Equipment Company Handbook

Denver Equipment Company Handbook

Copyriqht 1954 by Denver Equipment Company 1400 Seventeenth Street Denver 17, Colorado

Cable Address: DECO Denver Telephone: Denver,Colorado-CHerry 4466

PRINTED JX U. S. A. I 1 DECO Engineers Handbook No. 1 is dedi- cated to the world-wide profession of engineers whose responsibility it is to supply Denver Equipment Company .. . essential minerals to industry and to do it with the greatest possible profit from mill COLORADO. Denver 17 operation. Denver Equipment Company 1400 Seventeenth Street P.O. Box 5268 Equipment and accompanying specifi- NEW YORK, cations has been designed to give contin- New York City 1 uous "24 Hour Se~ce"because the age Denver Equipment Company old saying "one hour's delay means no 41 14 Empire State Bldg. profit today" is more important now with ILLINOIS, Chicago 1 increased operating costs than ever before. Denver Equipment Company 1123-24 Bell Building We have tried to supply in this hand- 307 No. Michigun Avenue book baaic enqineering fats and data on TEXAS, El Paso equipment as we11 as frequently used tablea Denver Equipment Company and conversion charta UTAH, Salt Lake City Denver Equipment Company This book is designed to help you. There P. 0.Box 705 may be other ways that we may help yo& MEXICO, Mexico, D.F. Denver Equipment Co., S.A. and if so, please let us know because it is 14 Avenida Juorez, Derpacho 615 our sincere desire to be of service. All we CANADA, Toronto 1 ask is the opportunity to make you "Hap Denver Equipment Co. (Canada) Ltd. pier. H,ealthier and Wealthier" and the 220 Boy Street opportunity to work with you in supplying any or all of your equipment needs. CANADA, Vancouver Denver Equipment Co. (Canada) Ltd. 305 Credit Foncier Bldq. ENGLAND, London, E C 2 Denver Equipment Co., Ltd. 15-17 Christopher Street Finsbury Square SOUTH AFRICA, Johannesburg Denver Equipment Co., S. A. (Pty) Ltd. 9th Ave. and Broadway. Ber. Valley INQUIRIES Your inquiries are solicited. Further de- Customer's name and address (for tails, specifications and bulletins on any mailing purposes). items listed in this handbook will be sup- Customer's name and address for plied promptly. We will be most happy to SHIPPING purposes. give you our recommendation on any prob- Name and address to which invoice lem without obligation. Our primary objec- and shipping papers are to be mailed. tive is to help you by supplying sound information and proven mill equipment that will Complete shipping instructions in- make more profit for you. cluding destination and special rout- GENERAL ing if preferred. The dimensions and weights of machines 5. Specify if this order should be consoli- listed in this catalog are approximately cor- dated with previous orders for ship rect and are for estimating purposes only. ment. Should the data be required for design lay- 6. Specify the number of copies of in- out or installation please write to our engi- voice, bills of lading and packing lists neering department for latest specifications. you require. Unless otherwise indicated, the diameter of a machine is listed first and then the length 7. Specify the number of sets of blue- or height. For example: A 20'x 10' Thick- prints and operating instructions you ener has a tank 20' dia. and 10' deep. require. ORDERS 8. Specify if partial shipments are per- Delivery is normally an important item mitted. (We urge partial shipments be in selecting equipment. Delivery estimates, allowed wherever possible.) based on conditions existing at the time 9. Be sure to list size and description of quotations are made, are subject to adjust- machines ordered. ment at the time your order is received. 10. Describe hand of machine. (Please Considerable time can be saved in proc- use sketches to indicate location of essing an order if all necessary information feed, discharge, source of power. etc., is furnished. Otherwise your order may be for each machine.) delayed as correspondence is carried on to obtain the essential information. 11. Indicate type of drive: whether belt or motor drive. If it is motor drive, please Please check this list to see that your order specify exact electrical characteristics contains the following information if appli- -phase, cycle and voltage. cable: 4 12. In case motor driven machines are AGITATOR, Denver Center and Side Air-lift ordered with the drive but without motor, the customer must furnish cer- tified motor prints. 13. Please illustrate with sketches any special features. 14. Specify name and address of final user. 15. Give shipping date required. Denver Side Air-Lift Agitator type, need on]y have the 16. Specify any special markings to be Side Air-lift pipes installed, shown on shipment. the angle of the rakes changed and the R.P.M. of the rakes increased, to use it as a Side Air-lift type. 18. Specify final use-Uranium-Gold- The totally enclosed, running-in-oil head motion, with integral rake lifting device, is sealed against entry of dirt Paper-Lead. etc. All export ship- and is equipped with hollow center shaft so that air can be added for the Center Air-lift. ments require end use certificates The rake lifting device is particularly advantageous when starting up after shutdown where it eliminates damage to signed by the purchaser and final shaIt and rakes. The rakes, after having been elevated out user before we can apply for export of the settled solids can then be lowered gradually. Handwheel is conveniently located on top 01 mechanism. licenses. If you prefer to apply for Rake arms may be adjusted to any angle from horizontal to 45 degrees. Rakes may be changed in angle to rake toward your own export license, then please the center or toward the periphery of the tank. Center Air- let us know when placing order to lift type operaies at a normal speed of 2 to 3 R.P.M. while avoid duplication of effort. Side Air-lift type operates at 4 to 6 R.P.M. Side Air-li 19. Please furnish government priority Pulley rating if available. 20. Furnish import license number if required. Only a few of the above items may be applicable to your order but much time will be saved if an order contains all necessary information and then deliveries can be made much more promptly.

DENVER EQUIPMENT COMPANY Box 5268, Denver 17, Colorado (Continued on next page) 7 1%-2 6200# 2-3 775O# 2-3 Machine Tank Capacity Overall... Apprax. Shlp. Wt.. Lbs Cubic Feet Dtmenrian3 Mato -Tank- -Mechanlrrn~ ~ 1 2-3 1 7800# 1 3-5 7900# 2-3 Size* I **Wood. Steel 1 011 Fit. I 1 Wood Steel Belt Motor 3-5 8OOOft 3-5 87508 2-3 3 x3' 11.1 21.2 3 4" 4'11" 1 190 190 1.~1' 38.1 so 3 4'4" 6'2'' I % 330 425 Air Requirements 5.~5' 78 8 98.1 5'5 7'3" 2 520 670 6'6" 8'3" 6.~6' 141.4 169.6 3 760 950 l'x7' 2306 269.4 7'6" 9'6 3 LO30 1360 Additional Av. ble Tpnk Capaclty Per 8'=8' 3511 402.2 8'6" 10'9" 5 1400 1790 C ~citvmn Foot Depth IO'xIO' 704 0 785.1 10'7'' 12'9'' 5 3300 3584 ic Feet in Cu. Feet - 12'=12 1241.0 1357.2 12'7" 16'0 7% 4700 6100 Dm Dcptt Stee *Woad l Steel I *Wool ---. I4'%14' 1996.0 2155.2 14:8" 18'6" 7% 6500 7800 5' 5' 77 16'xLb' 2906.0 3216.9 16'8" 20'8" LO 8570 14320 6' 6' 139 IB'xL8' 4233.0 4580.5 18'10'' 22'8" 10 LIZ43 17660 7' 7' 228 ZO'x20 5853.0 6283.2 20'10'' 25'0 IS 14245 23400 8' 8' 350 *Machmer 14 xl4' and larger built with am-lilts. 505 **Tanks 10'110' and larger with 3" staves. 682 ***For V-belt driven xitator with rtecl tanks. 12' 12' 1217 14' 14' 1950 AGITATOR, Denver Pachuca 15' 14' 2260 16' 11' 2560 DENVER Pachuca Agitators 18' 16' 3725 effect agitation and oxidation 19' 16' 4200 by means of air pressure. The 20' 16' 4625 tank is circular in shape, and 22' 16' 5615 equipped with a 60" conical 24' 16; 6700 false bottom and a central air 25' 20 9200 20.0 tube which is approximately 26' 20' 9880 20.0 1/10 of the diameter of tank. 28' 20' 11520 20.0 Compressed air is introduced 13280 8180 mtu the lower end of the tube - by either a rubber sleeve I1 WOO ankr up to and mcluding 14' and 3" staver on rxer v d ranks' valve, a ball cock, or a plain I. double air requlrementr in above table Pressure pipe line exlending from the Lop of the tank to the bottom AGITATOR AND CONDITIONER. of the tuhe. The lower end of Denver (Open Type 1 this pipe liue is turned up to DENVER (Open Type) Agi- introduce the jet of air into tator and Conditioner is simi- the lift tuhe. lar to the Denver (Patented) After the tank is filled with Super-Agitator and Condi- DU~D.the air valve is o~ened. c,oss-se~~~onof omw Pachvca not- ?hi's' permits the air to' enter tioner except that the hood tator Showing Coniral Bomm the tube under pressure, m&- and standpipe have been elim- ing an upward current, and inated. This unit can be suc- overflowing at the top while fresh pulp is taken in at the cessfully used where condi- bottom. A complete circulation of the pulp is produced by tlons require a moderate agi- this action, and it can be continued until all values have tation or mixing action on passed into solution. light pulps. Many industrial applications where continuous Air Approx. mixing is required utilize this ~~,".";~~l,~~D~o~~","lPP~~~~~~l~~~~sturdy but economical agitator. Wt.. Lb.. Further detailed data on dimensions and capacities and other valuable information can be obtained by writing any Denver Equipment Company office.

8 AGITATOR AND CONDITIONER. AMALGAMATION CLEAN-UP PAN, Denver Denver (Patented) Super- (Wheeler Type) -See CONDITIONER. r- 1 THE Clean-Up Pan has all - the advantages of the arrastra and Wheeler Pans, and is designed for batch or continuous amalgamation t r eatm e n t of AMALGAMATION BARREL, Denver high grade ore, flotation and tab l e concentrates. Greater DENVER Amalgamatron Bar- rel IS used for batch armdlna low a cuncentrate is shipped to the smelter. In cr,ntinunuc oneration. the

",, em-UP Pan the bottom where they are w~ttedand absorbed by the mercury. The mineral values are ground and polished by heavy shoes which are dragged over a stationary d~ering. Due to the design of this die ring the mercury is not actually ground with the pulp so there is little "flouring" and loss 01 Belt Drwe. Showtng clean-~utDoo1.r batch ground, either wet or mercury. The hcight of the shoes above the die ring is ad- dry. Special lifter bars can be supplied tor mixing purposes. justable and they are easily replaced. Rubber liners may be furnished to reduce abrasion losses. Shell is replaceable. p.fachine 'Cap-ciry Dlmenrions M~~~~ Shippmg Wt.. Lbs. Belt or motor drive can be supplied according to individual requirements. For amalgamation work a two speed motor I 2 I L , .1 I- +Belt ..I.. drive is recommended, the hlgh speed for the mitial grinding operation and the low speed when the mercury is added. The emptying and cleaning of this unit is greatly simplified by ~tsdistinctive design. Two clean-out doors are provided 'Capacity depends upon s~zeof feed. Iinenar of gnnd, and the applicat~on at opposite ends of the harrel, and an extra grate door When used pnmarlly as an amalgamator, the capacity is greater than arrangement allows the discharging of the unit while retain- when used for gr~nd~ngas well as amalgamation. mg the grmding medium. lIncluder tight and Loore pulleys. More complete information can be obtained by writing any Denver Equipment Company office. Denver Ore Tests are made on an "actual cost" basis. This brings the world's finest laboratory equipment Approx Shrppmg Motor Wt Lb.. and skilled technicians to your service H.P. *&It / Motor at a very low cost. AMALGAMATION DRUM. Denver

WHEREVER free gold occurs ir, a heavy concentrate, whether from placer or milling operations, the Denver Amal- gamation Drum is the ideal machine to remove the gold in

I I the form of amalgam, leaving a mlneral-free tailing. Ordinarily a single large hall is used and this grinds and -No Pullrya are ~ncludrd {Made in Canada only. amalgamates the mineral with the least possibility of flouring the mercury. A tilting devlce is arranged so that the slimes (Continued an next pmgc) AMALGAMATION UNIl-. Denver can be drained out while the i------H---i DENVER Amalgamation Unit drum iq rutating. The concen- has been developed to simplify trate is removed through a and speed up thc discharging drain outlet located on the and cleaning of concentrates arnalpnm groove. This groove after trealment in the Denver collt~tsthe mercury and holds Anmlgarn Barrel. The Unit the concentrate while the consists of steel supporting slimes arc being discharged. framework on which is This amalgamation drum is moontcd the amalgam barrel very inexpensive and easy to with trunnions and drive, operate. It should be used for splash pans and amalgam sep- the final clean up of gold con- arator. The complete Unit is centrates from larger amalga- used to regrind and amalga- niatim operations in place of mate concentrates, and the niortars and hand pans. usual practice consists of: (I) The first period, ranging from 6 to 12 hours, is for re- nimcncinns Shippln~Wt.. Lbs. grinding the concentrates to free the gold from the ore or - tl P - sulphides, as well as to thoroughly mix the pulp with any Gas Belt .Motor

~ chemicals. such as lime, soda ash, caustic soda, or nitrates. 235 5y 24., This operation, to be most efflclent, is conducted at a grind- +'4 +'4 435 460 Ing speed, and usually requires no attention. It can be con- 86 58" 38" I j; 1863 1630 1805 1 ducted on the amalgamator's off-shift. *AvalIrble recrionalimd !or rnulbd~kt;-oortakon (2) The second step, which usually lasts from one to two AMALGAMATION PLATE, Denver hours, consists of first addi~lpthe mercury needed to amalgamate the gold and then running the barrel at approxi- DENVER Amalgamation mately one-half the original grinding speed. The lower Plates are made from the fin- speed reduces the flouring of the mercury to n minimum. est cold rolled annealed cop- It is easily obtained by use of the two-speed motor supplied per plate, approximately %'' az standard. thick, with one, one and one- (3) A grate is placed on one of the dirchargc openings half or two ounces of silver and as the barrel is rotated the contents are drained out. plating per square foot. Heav- aided bv wash water introduced through the swivel water ier plating is apt to peel. and connection. 1s not recommended. (4) In the Denver Separator, the amalgam and mercury Standard sizes are shown in are removed from the gangue material. This separation the following table. These is accurately performed by a carefully controlled upward should be specified wherever flowing current of water, which the operator watches through possible as odd sizes necessitate the heavy glass tube of the separator. The amalgam and cxtr:~cutting arid a 1070 in- mercury drup into a container or lorked receptacle for crease in price. subsequent retorting and reduction to a gold and silver All plates are carefully bullion bar. wrapped in blankets and then boxed to prevent damage in Mole complete information ran be obtained by writing shipment. Shipping weight is approximately nhe pounds any Denver Equipment Company office. per square foot I

Approx Sh~ppmgWt , Lbs Appmx - -- Plate Sll? Plate I oz. 1'2 02 2 "1. Thickness Ag. per Ag. per Ag. per Sq. Ft Sq. Ft Sq Ft. 48" 48" 48 5L 48" 54'' 48" 60 an" 96 48" 144'' !lil 52" 96 5 96" tBuilt in Censde only. 6V 96" *Indudcn tight and 1m.c pullcv-. bU 144" ARRASTRA, Denver BALL MILL CAPACITIES

THE Arrastra is used in small 4sa; Shart Tons/24 Hrs Motor gold mills to treat high grade la11 Load Jutput (Lbs ) (HP) ~ravityconcentrates by batch -. ...~- amalgamation. Its capacity is 3.700 200 to 300 pounds of concen- 5.600 trates per day. The usual 10.500 practice I, to grind a small 11,000 charge 5 to 7 hours, or until 22.000 Iuw enuugh to add mercury, alter which grind~ngis con- 19.500 tinued lor several hours Every 26.000 day the linely ground charge 23.000 is flushed out to waste and 30.500 26,500 a new charge shoveled in. Periodtcally the accumulaled amalgam is cleaned out 01 35.500 the Arrastra 44,000 The Arrastra consists of two alloy iron shoes which are 35.000 dragged along the bottom of a 30 diameter circular bowl 47.000 by mearls of a rotating arm. The bowl and bevel gear 58.000 drlve are mountcd on cast iron legs. Power requ~red b about 3 horsepower. Shipping we~ghton the belt-driven 52.000 machme is approximately 750 pounds. 60.000 68.000 90.000 BALL MILL, A-C 66.500

A PULP level sufficienlly h~ghto interpose a bed of pulp, 81.000 partly to cushion the impact of the balls, permits a maximum 99.500 crushing effect with a minimum wear of steel. The pulp 82.000 level of the Alh-Chalmers Ball Mill can be vaned from 102.000 dischargmg at the periphery to discharging at a point about 123.000 half way between the trunnion and the periphery. Data bared an:-Wet grinding. smgle stage, closed circult operatroll feed:-(l," one way drmensmn): Class 111 ore. All mtlls:-free dmcharge, grated type, rapid pulp flow N. B -far overflow type mills: ~apacity 80%-power 83', Dimensions.-"dtameters" ~nsideshell wthout liners-"lengths" working length shell between end Liners

We have often been referred to as the All8l.Chalrners Ball MIII Showins chiried to gauge so that the Drum TY~Fwdar shells are int~rchangeable. "Diagnosticians of the ore dressing Various types of liners and industry." Perhaps we can help you drives are available and further information will be sup- with your mineral recovery problems. plied on request. Please let us try. BALL MILL, Denver ( Muleback Type) BALL MILL, Denver 30" r- I DENVER (Muleback Type) THIS Denver (Convertible) Ball M111 is unique in design and is particularly adapted to small milling plants. The shell is cast in one piece with a flange for bolting to th~head In converting the mill from a 30"xlB" to a 30"x36 unit with double the capacity, it is only necessary to secure a second ju'r3b" ocnrer ccot,,ertnble) cast shell (a duplicate of the sources of gold, silGer and B~II1.1811 first) and bolt it to the original st~mtrgic minerals are often found by the prospector, not close by our modern highways, but far back in the moun- section. tains and deserts all over the world The Den\.er Equip- Denver 30" Convertible Ball Mills are furnished with scoop feeders with replaceable lips. Standard mills are furnished ment Company has realized this fact, and therefore has with liners to avoid replacement of the shell; however, the designed a Denver Ball Mill that can be transported to these mill can be obtained less liners. This ball mill is often faraway and relatively inaccessible properties, either by driven by belts placed around the center, although gear the age old "muleback" transportation system. or by the drive units with cast years can be furnished. A Denver modern airplane. As a result these properties may now ob- Spiral Screen can be attached to the discharge. tam a well-designed ball mill with the heaviest individual More complete information can be obtained by writing piece weighing only 350 pounds. any Denver Equipment Company office. The prime factor considered in this design was to furnish equipment having a maximum strength with a minimum we~ght For this reason, these mdls are made of steel, giving a high tensile strength and light weight to the milk The "muleback design consists of the sturdy cast iron head 40 construction an the 30" slze and cast step1 head construction 1 Mrrh / / L ( W H / Belt Motor on the larger sizes. The flanges on the heads are arranged Lo bolt to the rolled steel shell provided with flanged rings. When required, the total length of the shell may colvist of several shell lengths flanged together to provide the desired mill length. Liners, bearings, gears and drives are similar to those standard on all Denver Ball Mills. Submission of your problem to the Engineering Department of the Denver Equipment Company will result in prompt and accurate analysis of the conditions involved, with a Sizes 30" x 26" and longer are also availn1)le recommended solution to the problem. in steel constixction. More complete information can be obtained by writing any Denver Equipment Company office. Denver Equipment Company publishes 1 1 Net Weight of Heaviest Pieces-Lbs. ---1 Motor DECO TREFOIL, an exchange of help- hunnxon I Shell Sectlo" ful engineering information designed to improve milling. DECO TREFOIL is published every other month. If you are connected with mining and do not receive DECO TREFOIL please write to us. BALL MILL, Denver Batch BALL MILL, Hardinge Conical

THIS mlll may be used for

oenverc~~ab-~~3 unit FIO~~~IO~ cell this type of ball mill is the Taking Conical Mill DI.icharw Strength due to the oanrar antoh ad MIII give long wearing life. Two conical steel ends. grate cleanout doors are pro- Sizes of conical mills are glven in diameter of the cylin- vided on opposite sides of the shell by means of which drical section in feet and the length of the cylindrical section the mill can be either gradually discharged and washed, in inches. Liners can be had of hard iron, manganese steel while running, or easily and rapidly emptied and flushed or Bclgian Silex. Forp~dsteel balls or Danish Flint Pebbles out wh~lcshut down Wash-water is introduced into the are used for the grinding media, depending upon Lhe mate- ~nteriorof thp mill through a tapped opening in the trun- rial being milled. nion. The mill may be lined with rubber, stlex (buhrstone) Various types of drives can be furnished to suit the indi- or wood if desired vidual requirements of particular installations. Let us make Drtvea av~ilablcare as follows: (1) Motor, V-belts and recommendations for most efficiently solving your grinding spur gears; (2) Flat-belt drive through tight and loose problem. pulleys and spur gears; (3) Flat-belt drive through tight and loose pulleys direct to trunnion shaft. APPROXIMATE CONICAL BALL MILL CAPACITIES MEDIUM HARD ORE Machmc I Capacity Size Lbs. Pcr * C *city. Tons ar24 Hours , Charcc Sirc of -- Mill 2" to lo I" to h5 ,^10201 MII~ Mcsh Mcsh 1 - 2 5 1x2 9 I2 I8 23 33 42 tB",lt in Canada only. 60 *Includcm ti~htand laav pullcY3. 77 90 100 115 150 185 11s 150 Mill design and Flowsheet design are 180 380 also services of Denver Equipment Co. 465 Write for details how these services might help you. *Tha capadtin shown in the fint columr. are bad upon tha mill operat- inp in open circuit, and those in the other three columns, in cloned circuit.

19 CONICAL BALL MILLS CONTINUED 1s due to th~,all steel cortstruction The trunn~onsare an - - integral part of the cast steel heads and arc machined with Appruxlrnate Welshl. Pounds the axis of thc mill. The mill heads are assured against ... dl Charge breakage due to the high tensile strength of cast steel 'a, - compared to that of thc cat iron head found on the ordi- 900 375 500 nary hall mill Denver Trunnion Bearings are made of high- 3.800 1.400 1.000 4.300 2.200 1.800 grade nickel babbitt. 5.000 3.000 2.500 Denver Steel Hrad Ball-Rod Mills ran h, converted II,!,, 7,700 4.800 4,000 larger capacity mi!ls by boltmg an additional shell length 8.100 5.400 5.000 11.000 7.800 7.500 onto the flange of the or~ginalshell. This is possible hecause 9.000 all Denver Steel Head Ball-Rod M~llshavc bearings su~tahl~. 11.000 15.000 lor mills with length twlce the diameter . 18.000 Head and shell I~nersfor Dcnvcr Stcel Head Ball-Rod 20,000 Mills are available in Decolloy (a chrome-nickel alloy), hard 24,000 28,000 Iron. electric steel, molychrome steel, and manganese steel. 24.u00 19.000 33.000 Urlve gears are furnished either In cast tooth spur gear and 27.0011 23 000 37,000 10,0110 26.000 42.000 pinion or sut tooth spur gear and pinion. The gears are 33.000 29.000 47,000 furnished as standard on the d~schargeend of the mill, out 41.000 ' 30.000 65,000 5L.000 75,000 of the way of the classifier return feed, but can be furnished i 35mo at the mill feed end by request. Drives may be obtained -Taken from Har ge Catalog according to the customer's s~ecifications. ~enve; Ball-Rod Mills have greater capacity than most mills because the diameters of Denver Ball-Rod Mills are measured inside the liners, while most mills measure inside BALL-ROD MILL, Denver Steel Head the shell Additional data gladly furnished upon request. THE Denver Stcel Head U;ill-Rod Mill give.; thr ore

dressing c n g i n e e r a wide Cap. Tons Slrc of Scoop chcict. in grinding design scl Pcr 24 hrs. Fcrdcr .- -- a H that he can easily securp ------Denver Ball-Rod Mill huited In his particular problem. 4'- LO' 4'-10. The succr~\sful operation of 4'-10: nny grinding unit is la~gely 4'- LO 4'-10' drx>endent on the method of '4-10' n=m<,ving the ground DUI~ 4' 10. -- -- Thr Denver Ball-Rod Mill is 6'-7' ~v.~tlablvwith five tvms.. of 6'-7' ill.charge trunnions, each type 6'-7' 6'-7' oht;tin;lhlc in small, medium 6'-7' car large diameters. The types 6' 7' - - (11 discharge trunnions are 7'4. (11 overflow. (2) perforated 7'-9' 7'-9' overflow, (3) return spiral, 7'+: (4) grate, and (5) peripheral. 7'-9 7'-9. Thus the engineer can fit any 7'-9' onr of liftpen methods of dis- -- - 1O'-4: charging a ball mill into 10'4 rl0' Denver Steel Heall Rod M!ll grinding pmblem. 10'4' 10' 4' rcth Lame Dl$cl~arge~runnm The superiority of the Dcn- 10' 4' ver Steel Head Ball-Rod Mill 10'4'

(C~ntinucdon next page)

2 1 (Continued from preceding page) APPROXIMATE MARCY BALL MILL CAPACITIES MEDIUM HARD ORE I Ball Rod 1 Approx. Ship Chsrgc I Chsrgc I Wt Lb3 Pounds I Pounds -+ - - - o ~unMom Mtll No 11," 1 " 1 ... . - 1 Di. / Lgth. to 8 to 48 to 65 Wcrh Wcrh Wcrh

-A - - - 22 12 9 33 i8 13 44 24 18 55 31 22 75 4 I 30 93 51 38 4'13' 4'x4' 138 79 55 4'~s' 207 118 83 4'r6' 4'ra' 220 122 86 4'rlU' 330 187 130 367 207 146 S'x3' 440 248 175 5'r4' 'r' 720 405 290 S'r6' 865 486 348 sr8' 1010 567 406 S'XIO' S'x12' 1100 620 450 1540 880 640 -2700 -1548 1125

Uwal Bell BALL MILLS, Marcy M~llNo. Zhargr Wt . To 'Matar Lbr. Run Rccom mcndcd - 32 1000 LO 33 1500 15 34 2000 20 43 2500 20 44 3300 25 45 4200 30 54 5000 40 56 7500 60 63 6000 60 100 . . - -.. .. . - 64 55 9000 charged at the other in a con- 65 10000 100 66 l2000 125 tinuous operat~on. The entire discharge end is fitted with a 75 l8000 grate or screen, back of which are radial lifters or blades 76 21600 which elevate and qurckly remove the ground material. 77 25200 This material rapidly sifts through the grates; the lifters pick 86 28000 it up at once and discharge it out the trunnion, through 97 46000 74000 which no balls or coarse pieces of material can escape. 109 - The Marcy Mill.wil1 take material as coarse as 252 inches *A low current, hlgh arting rque motor 1s recommended for less than 20 H.P.: above th. rlre i round rotor (slip ring) motor should and deliver an 8 mesh product without the use of screens or be used. classifiers. In conjunction with a screen or classifier it will deliver any mesh product. Mills Nos. 32, 43, and 54 can be sectionalized for muleback transportation when necessary. Information furnished upon request. BALLS, Denver Grinding

DENVER Grinding Balls are forged from the best high- carbon manganese steel and are non-breakable. These balls are of the wry highest quality that can he produced, and give long, satisfactory service. Prices on either small or car- lots are gladly furnished upon request Denver Cast Alloy Steel Balls are lower in price than the forged type and where freight and haulage are not factors, they are often more desirable

Approx. No. of Net Size oi Wei~ht Hall, Average Grindln~ Each in Per Weight Ball. Diam Pounds K~E Per Ker

~ --- - pp--. . - ~ -

BLOWER, Denver Rotary

DENVER Rotary Blower ior pressure and vacuum service is universally used wilh gas or oil burners, furnaces, DENVER Supercharger forges, ovens, etc. Blower IS an ideal unit for Two interengaging irnpellcrs, supplying low-pressure air rotating in opposite directions to the Denver'Sub-AnFlo- draw air inlo the pockets be- tation Machine. It is also tween the in~pellers and the used for supplying low- case, and iorce this air into the pressure air to oil and gas discharge pipe. The arrrount of fired furnaces, pneumatic air displaced by these irrrpel- conveyors and for agitation lers at each revolution is defi- of liquids and pulps. nitely known. so that an R.P.M. This is a centrifugal type may be selected to deliver any turbo - compressor deliver- rvuuired miount oi air. ing air at a uniforrrl pres- Denvc,r Rotary Blowers are simple in design, without sure. valves, sliding vanes, springs, or olher delicate parts to wear, Single-stage machines of- break, or become noisy. All the parts are made of the best fered for installation where grade of material obtainable to carry the stresses placed on low first cost is desired, will deliver reliable air service in each particular piece. Low bearing and gear tooth loads, and pressure from 4 to 16 ounces and in volumes from 110 to 2350 small clearances between operating parts, enable these blow- cubic feet per minute. Multi-stage machines are available ers to mainlain their original eificiency for many years. that furnish pressures irom 8 ounces to 2 pounds and in volumes up to 20,000 cubic feet per minute. DEN\ -- BUCKETS, Denver Ore lolurne pi)rox. M.rhi.c :u. Ft. Shtp. DENVER Ore Buckets are built er MI". t.. Lbs. Size Motor of heavy steel shaged on forms - -- .- - and soundly rivcted. The bot- 025 %~I 300 245 toms of these b u c k e t s are 025Sh~l 375 260 260 0251-1 concave, so that the ring to so0750 425 0251 52 1 465 which the dumping chain is 0252 1 1000 -- - .- ~- attached does riot prevent their 165 245 standing upright. 250 260 The superiority of thew ore 340 260 300 buckets is due to the~rheavy 500675 465 construction and careful as- 1000 --465 - ~ sembly. 110 245 These buckcts are designed 160 260 '240 260 to 1)c 1;rrge enough in diameter 150 300 and short enough in height to 450 335 760 465 k stable and easy lu handle 1165 710 D~,,~~~orc ~~~ket.for ~olrts 710 The center of gravity is low 1925 Lrlt Nos. 1-3: Rioht Nos. 4.14 ?nough SO that the bucketz 2000 765 - do not tip over easllv. Thus, 150 390 200 390 they can be conveniently used on or in conjunction with 275 425 either style of Denver Ore Bucket Cars. 400 465 600 465 Many sizes are kept in Denvor stock. I050 510 1600 710 2100 765 Clparlt~ Diarnetcr, lcclles Appror. Sizr -- - - Hright Ship. 225 425 No. Cubic Averagc 325 165 1 Fcn 1 L61 Ore 500 465 850 510 I300 710 1700 765 2650 845 - 37 260 475 24 400 475 28 750 710 19 1100 710 40 1500 765 48 2200 845 40 - - 42 64 710 28 950 710 1275 765 1900 845 2550 875 - AIR REQUIREMENTS FOR DENVER "SUB-A" SUPERCHARGED FLOTATION MACHINES We have often been referred to as the Machine Prcs.urc Air Rcqd. Sire PS Cell "Diagnosticians of the ore dressing industry." Perhaps we can heh you No. 8 (16'r16') 8 3 No. 12 (22.~22') 8 10 with your mineral recovery problems. No. 15 (24.~24') 8 12 No. 18 (28'128') 8 18 Please let us try. No. 18 Special (32.~32') 8 24 No. 11 (38.138') 10 40 No. 24 (43'1437 10 50 No. 30 (56'156') 12 100 CAGES, Denver Mine BUCKETS, Denver Windlass DENVER W~ndlassBuckets are DENVER Mine Cages are designed from experience ac- quired by building hundreds of cages In various sizes and of the lishtest posslble con- types. These cages are built with highest quality material struction consistent with the and precision workmanship. requlaite durability and stout- As shaft dimensions vary, Denver Mine Cages can only ness for the rough handling be bullt on order. When'asking for quotations or ordering they receive. The bails are cages or chairs, list the dimensions of your shaft as indicated made of the lightest and tough- bv the diaeram. For cages. eive all dimensions. A-A. B-B. est steel available and will not I&, all dimensions are also nee: flex under the heavlest loads essary. Specify: load to be ~nfl~ctedIn prospect hole ore carried; whether or not safe- Denw Wlndl?~00le Buckrli ty doors are required in ac- LPI~NO 9 and R iil,t N~ (I 110~5tlng01)eratl01= cordance with local mining laws; whether or not cages Approx. are to be equipped with Den- Shrp. Wclght ver Automatic Landing Chairs. Lb3 (see CHAIRS) ; whether cage is to be built with single or double deck. Types of cages listed in the accompanying table are the small sizes. The difference between the three cages listed BUCKETS, Denver Water under the heading "Types" ,is in the weight of the material DENVER Water Buckets are used in their construction to smooth on the outside to pre- D."V.F mine callawith Door, allow for greater weight loads. vent their- catching in the shaft. and Lnndong Cham Eoulrrad wlh Thp Standard Denver Cage They are made of the best Rollcrr for Use in lncllnsd Shall may be furnishPd without steel, with wrought iron bails, safety doors for use when and In the bottoms are auto- handling ore cars and car stops matic valves which are tight, are provided if specified. When durable, and infallible. safety doors are required they Denver Water Buckets or can be furnished of either solid Bailers are made with and or perforated steel plate. without strips. Safety catches are provided Auoroximatelv.. . M%. is added with spring operated cams. Denver water Buckets or Ba8lerr to, the price for bu( ets with The cage illustrated in the Lefl wlln Strlrs-Rlmt without Slnm lelnforclng strips. top photograph is equipped with rollers so that the cage Approx. Dlarneter Th~kncss Shtp. may be used in an inclined Length of Stccl Wclght shaft if desired. This unit is Mlddlc Ends Lb*. equipped w i t h perforated i -- - i - -. .- 12 Ga. 170 safety doors and also with 36:48 llGs 220 landing chairs. The lower 44" 10 Ga 275 48" LO Ga 325 photograph shows a two-deck 52" 8 Ga 425 Double ~eckD~~~~~ M~~~ cals Denver ?dine Cage. The Stand- 56" 8 Ga. 490 ~8thSatety DOWS 60" ?a" 590 ard Denver Cage is also avail- 64" A'' 625 66" +G " 770 69" ?& " 880 72" j'G'' 935 76" &* 1000 able with a self-dumping skip CAR, ORE, Denver (Rocker Dump) mounted beneath the cage. An illustration of a Den- ver Mine Cage equipped with Automatic Landing Chairs and Safety Doors is shown under the item CHAIRS. A well qualified engineering and fabricat~ngforce is at your A disposal for the design of cages to fulfill th? requirements of your special installation. Cus- tdmer should furnish data as --___I The body is clrried on heavy outlined above. Dun,o Ore Car cast steel rockers and rocker stands, which are covered by a plate to prevent spilled material lodging on the rockers. Singlc Deck Double Deck The body is made of heavy plate, propcrly braced and arc qyw . ..~ welded, making a tight container with no doors or openlngs through which material can leak out onto the trackway. Denver Rocker Dump Ore Cars are made on order to meet vpcrat~~rgconditions. These cars are popular in capacities ranging from 20 to 40 cu. ft. and for from 18" to 24" gauge mine track. Write for additional information. 'Special cages of any sire can be furnished. CAR, ORE, Denver (Standard)

CAR, Denver Ore Bucket DENVER Standard Ore Car DENVER Ore Bucket Cars are IS made of the verv best ma- built of the strongest welded terials and is designed for steel design and are built with the most severe service. Al- the expectation that continu- though it is regularly fur- ous service will be required of nished with plaiG bearing them. wheels, roller bearings can be As shown in the accompany- supplied whenever preferred. ing illustrations, these cars are Ordinarily this car is built made in two styles, both of for standard eighteen inch ' which are built as standard gauge track although special style I oe"rer ole Car units for eighteen gauae track. units can be quickly manu- However, these ore bucket factured to the customer's in- cars can be promptly manu- Slandard Denver ore car dividual specifications wher- factured to any individual ever this is necessary. specifications desired by the The Standard Denver Ore Car can be knocked down for customer. airplane or muleback transportation to facilitate shipping Sty I e No. 2, which is tn remote localities. equipped with bucket guard, IS approximately 20% higher In price than Style No. 1. Sizc of Box in Inches size Specifications are given in the No. 01nrcr Ore Bucket Car wrth Guard following table,

No. 16 250 1500 24 20 No. 14 375 No. 12 440 No.,lO 512 rZ 600 CAR, ORE, Denver (Standard Cage)

DENVER (Standard Cage) Ore Car body is of heavy plate

1 I CLASSIFIERS, Denver Spiral THE Denver Classher has been successfullv used for so many years that-most mill operators are familiar with its principle and operation. This classifier embodies the simplest ?.". (Standard Ore Car tionalized for airplane or muleback transportation. design, smallest number of wearing parts, and an absence

of suree- in the~ ~ overflow.- -~--. It separates coarse and fine solids, carried in liquids, with a high degree of accuracy and Denver Clarriner-Molor Drive with lowest possibk power and maintenance costs. Additional information on these classifiers will be sent upon request.

*Cap~cc~yTons Diminsions ShiDDmg Machine per 24 Hrr. H.P. Wt.. Lbs. Sire ------.. .- -- - Overflow Sands I. w. th. Belt Motor ------30" 50 60 15'10" 48" 35" 2 4500 4700 36" 80 95 17 19'' 54" 36" 2 . 6750 6925 CAR, ORE, Denver (Type Z) 45" 125 200 21 64" 49" 2 9000 9400

DENVER (Type Z) Ore Car will meet practically all con- *Sand raking capacities are in tons per 24 hours at 1 R.P.M. of spiral ditions where cars of this style on 2.8 gravity of ore. Overflow raDacmcr are approximate per 24 are required. The body is well hours when separating at 150 mr~hon 2.8 gravity ore and 25% solids braced and riveted and two In thc overnow. angles are used to reinforce tHri~htdoer not include lifting device. fhe bottom. Cars of twenty cubic foot capacity and larger CLASSIFIER. Allen Cone are furnished with one rein- ALLEN Sand Cones and Allen forcing strap or band in the Slime Cones have applica- center of the body. Bumpers, - used as handles when dump- tion in ore-dressing, chemical ing, are located at the strong- and industrial processes for est part of the body. The door classification, dewatering, de- Denver ITYOe 21 OTP car is well protected by a bracing sliming, leaching and washing. strap at the bottom where the If the pulp (solids and liq- cars come together. The turntable is of cast iron with a uid) contains more than 5% grease lubricated machined groove, which takes most of the of solids larger than 48 mesh, turning load off the king pin. The truck frame is in one the type 40 Allen Sand Cone piece without riveted corners to work loose or cause trouble. is almost always used, where- Brakes may be attached to any Denver (Type Z) Ore Car. as if the solids contain less than 5% coarser than 48 mesh Allen con= classifier it is generally advisable to install the type 50 Slime Cone. The feed enters the cone through an inner truncated cone, CLASSIFIER. Denver Cross-Flow settled solids gradually building up in the cone to a point restricting the out-flow of the inner truncated cone. This i-CLASSIFIERS having a heli- causes the water level in the truncated cone to rise lifting cal (often improperly called a @.oat which operates a series of levers to operate a ball "spiral") flight for removing valve to open a splgot in the bottom of the cone which cettled coarse material have discharges the settled material. This arrangement main- long been in successful use tains an even depth of sand regardless of increase or de- and most mill operators are crease in the feed rate. If a foreign object should obstruct (.~?r~liar " with their operation. the op.?ning retarding the flow the valve opens wider, thus The Denver Cross-Flow Class- all<>wingthe passage of the obstruction. ifier is of this general type but The opcralion of the Allen Slime Cone follows the same has nleny Improvements which general principle as described above except the float is result in improved metal:urgi- located near the bottom of the cone and IS operated by cal efficiency. longer life and the buoyancy of the settled slime. The float operates a less repair. Among theye im- hall valve and spigot same as for the sand cone. provements may bementioned: 1-The lower bearing has been moved up along the con- Overall Appro.. D~amcter Shipptng veyor shaft to a point above the puln level. thus eliminating Wt.,Lb3. the wear and repair which formerly resulted from sand -- getting into the bearing when it was rubmerged. 675 815 2-The location of the main overflow weir is along the I050 side of the classifier opposite the feed, resulting in free and 1600 unintarruoted straieht line surface flow from the feed en- trance to the overflow weir. The conveyor flight moves downward in front of the weir and the submerged portion CLASSIFIER, Denver Cone or Pyramid of the flight moves away from the weir. Thus there is a continual separation and movement of fines toward the CONE Classlfieri are built in weir while coarse material moves away from the weir. The two types, one operating on the settled material is continuany rabbled by the flight and density of the pulp in the cone, settled fines set free. This arrangement of feed, overflow and the other on the hydraulic and direction of rotation of the conveyor flight results in a or mechanical movement of the minimum of oversize in the overflow and a minimum of pulp The Denver Dewatering undersize in the sand discharge. This is improved metal- Cone 1s of the former type. lurgical efficiency. The weight of the pulp in the An auxiliary weir is provided at the end of the clnssrtler. cone actuates a lever with an Both the main and auxiliary weirs are provided with weir adlustlng weight, automatically blocks by which the depth of the pulp and pool area may controlling the discharge valve. be adjusted, thus controlling the size of se~aration. Denrrr Cons Clartaner This method gives a constant The Denver Cross-Flow Classifier is ruggedly constructed density discharge. The unit can and the tank is thoroughly reinforced. Bearlngs are large be used as elther a dewaterer or classifier, requires no power, and all gears are enclosed. The 6,9", and 12 sizes have and is ent~relyautomatic. replaceable hard cast iron flight sections on a square shaft. The body of the separator can be conical or pyramidal in The 18", 24", and 30" have replaceable hard cast iron fliqht shape, to suit best the phys~calrequlrernents of the location. sections. The 36, 42", 48", 54", and 60" sizes have replaceable The class~fiercan be used to advantage in dewatering and steel flights and replaceable hard iron wearing shoes. Sizes controllmg feed to a regrind ball or rod mill, or material from tables, jtps, or flotat~on. 30" and larger are provided with lifting device by which the lower end of the flight may be raised and the conveyor operated while it is slowly lowered, thus gradually removing the bed of solids which settles during a shutdown. Additional data gladly furnished upon request. CLASSIFIER. Denver Cross-Flow-Spiral CLASSIFIER, Denver Hydraulic Machine Sire Tank Lengths onveyor R.P.M. . .- - - DENVER Hydraulic Classifier 6 Simplex 5'.8" 14-39 is designed for use in gravity 9" Simplex 14-39 IT Simplex 14-26 concentration mills for pre- 10" Simplex paring a classified feed for 24" Simplex table concentration. 30 Simpler The classifier compartments 36 Simpler 42" Simpler are provided with glass sides 48" Simplex 5,- that the conditions existing 54 Simpler in each chamber can readily 60" Simplex be observed. Only enough 24" Duplex water 1s necessary to keep the 30 Duplex sol~ds in full teeter. As the 36 Duplex sands accumulate in the clas- 4Y Duplex I ' s~fler wcket5 the effective 49 Duplex . -- 54 Duple. F~~~.c~~D~~~~~~~4..r4.. D~~~~~ density of sand-water mixture ~ydrauhClawfmr increases and thumbscrews on the valve rod assemblies may be adjusted to discharge sand from each compartment as required. The finer the sand Ipprox. Domestic the less wate~is required. When the pressure regulating Machine Sire Hotor H.P. Overflow Sand Ship Wt.. Lbr. valves and the product valves are set, no further adjustment is necessary. 115 lbr./hr. 1670 lbs./hr % 350 The compartments are so arranged that the perforated 9' Simblex 835 Ibs./hr. 3330 lba./hr % 520 constriction plates for the coarser feed are nearer the feed 12" Simplex 670 Ibs./hr. 5830 Ibs./hr % 18" Simoler 46 I28 W-I end with each succeeding compartment arranged for a 24'' sim& 65 ZOO %-2 smaller mesh product. 30" S~mplex 94 275 2-3 The Denvcr Hydraulic Classifier is made in 2, 4, 6, and 8 36 Simplex 119 370 3-5 42" Simplex 168 470 4-6 compartments with two sizes of compartments, namely 40" Simplex 210 560 5.7% 4"xk and 8"x8". The standard units are of steel construction 54 Simplex 274 690 6-8 Capacity depends on specific gravity of the material and 60 Simpler 354 780 7%-10 range of size taken from each compartment. 24 Duplex 2-3 The 4"xC has a capacity from 5 to 10 tons per coml~art- 30" Duplex 3-5 ment in 24 hours. 36 Duplex 5%-7 The 8"x8" has a capacity from 20 to 50 tons per compart- 42" Duplex 5%-7 48" Duplex 7%-10 ment in 24 hours. 54 Duplex 7%-10 Additional data gladly furnished upon request. 60 Duplex 10.15 Machine 1 Number of 1 ynlyionk 1 Approx. *On sires larger than 12". capacity i. tons of dry solid per 24 hours. Size* Cornpart- Shipping Wt Lba. Domc=l!c Packcnrr based on 65 mesh separation. specific gravity of material 27, with mrntr 2046 solids tn overflow Sand raking capacity is ~n tons of dry solids per 24 hours at average conveyor

All we ask is a chance to help you and the opportunity to work with you on your equipment needs. *Odd number of compartments an be rupplzed such as 3. 5 or 7. Your comments and suggestions are always welcome. Please write to us. CLASSIFIER. Denver Cross-Flow-Spiral CLASSIFIER, Denver Hydraulic Machine Sire 1 Tank Lengths /Conveyor R.P.M. p~ DENVER Hydraul~cClassifier Simplex is designed for use in gravity Simplex concvntration mills for pre- Simplex Simplex paring a classified feed for Simplex table concentrailon. Simplex Thr classifier conlpartments Simplex Simplex are provided with glass sides Simplex sc. that the conditmns existing Simplex in each chamber can readily Smplex be observed. Only enough Duplex water is necebsary to keep the Duplex solids in full teeter. As the Duplex sands accumulate in the clas- Duplex Duplex I sifier pockets the effective Duplex ~~~~-~~~~~~t~~~t4-.4.. D.~~~~density of sand-water mixture Duplex HIIT~UIIE CIBS~~IOW increases and thumbscrews on the valve rod assemblies may be adjusted to discharge sand from each compartment as required. The finer the sand .pprox. Domestic the less water is required. When the pressure regulating Machine Size dotor H.P. Overflow Sand Ship. Wt.. Lbr. valves and the product valves are set, no further adjust- -- ment is necessary. 6 Simplex 115 lbr./hr. 1670 Ibs./hr The compartments are so arranged that the perforated 9" Simplex 335 lbs./hr. 3330 Iba./hr 12" Simpler 570 lbs./hr. 5830 Ibn./hr constrictmn plates for the coarser feed are nearer the feed 18" Simplex 46 128 end with each succeeding compartment arranged for a 24" Simplex 65 200 smaller mesh product. 30 S~mpler 94 275 The Denver Hydraulic Classifier is made in 2, 4, 6, and 8 36 Simolex 119 370 42" ~imblex 168 170 compartments with two sizes of compartments, namely 48" Simplex 210 560 4"xV and 8"xS". The standard units are of steel construction. 54" Simplex 274 690 Capacity depends on specific gravity of the material and 60 Simplex 351 780 range of size taken from each compartment. 24" Duplex The 4"x4" has a capacity irom 5 to 10 tons per com?art- 30 Dupler ment in 24 hours. 36" Duplex The 8"x8" has a capacity from 20 to 50 tons per compart- 42" Duplex 48" Duplex ment in 24 hours. 54" Duplex Additional data gladly furnished upon request. 60 Duplex D,rnrns*ons Appro. Shipping VJt Lbo. *On sire larger than 12". capaaty xr tons of dry solid per 24 houn. -1 W H Damcsr~cPacking bared on 65 mesh reparation. gravity of material 27, with I 20". solids in overflow. Sand raking capacity is ~n tons of dry solids per 24 hours at average conveyor speed.

All we ask is a chance to help you and the opportunity to work with you on your equipment needs. *Odd number oi compartments cln bc supphed such as 3. 5 or 7 Your comments and suggestions are always welcome. Please write to us. CLASSIFIER, Denver Hydro- tSire No. 'Capacity ~i~.Tons Solids In In Feet) Overflow Per H.P. id'h THE Dcnver Hydroclassifier 24 Hours i, dcsigned to make a separation according to size in the range from 100 mesh to that (,I colloidal particles. It is particularly suited to the removal of slimes prior to further treatment by flotation, cyanidation, or chemical processes. The separation in this ~enrerHydroclassifier fine size range requires a large. quiet, pool area, such as is provided by the Denver Hydroclassifier, combined with accurate control over the removal and washing of the settled material for maximum classification efficiency. In the Denver Hydroclassifier the feed enters a feed well in the center of a large settling tank and flows without agitation into the pool. The slimes and fine material move radially to the overflow weir at the rim of the tank and overflow into the overflow launder. As the slimes move to the weir, the coarse settle on the sloping tank bottom, where slowly moving spiral rakes continuously move these settled solids to a central discharge cone. In the discharge cone water is added below a perforated plate while tSize No. Approximate Shipping Weight Pounds the settled solids are rabbled above the plate, thoroughly (Approx. Di; In Feet) washing out slimes and fines from the coarse material, as Mechanism / Tank / Column. 1 Hand Rail it works through the openings in the plate. The coarse No. 6 material is usually removed in the form o[ a sludge by 7 means of a Denver Adjustable Stroke Diaphragm Pump. Accurate control is maintained by: 1. Control of the wash water added to discharge cone. 2. Control of the rate of removal of settled solids by means of the diaphragm pump. The tank is steel, thoroughly reinforced, and supported on steel columns thoroughly braced. The mechanism driving the rakes is an alloy steel gear and bronze worm, supported on anti-friction bearings enclosed and running in oil. The vertical shaft and rakes may be raised or lowered while the mechanism is in operation. Extra heavy construction is provided throughout, resulting in long life and a minimum of repair. Additional data gladly furnished upon request. (Continued on nexr page)

Please Give Us the Opportunity to quote prices and delivery on standard L equipment to meet your needs. +In addition to thrse standard machine. we can furaiah larger sixes where mechanism is placed in customer's concrets tanks. Mechanism sires 22 to 40 can be furniahd for concrete tanks. *These sizes can be furninhed in Denver Bolted Steel Tanks. *Capacity range depending on mah separation, specific gravity and Per cent solids in products. *'Hor?epower depends on the amount of solids settling and specific gravtry. I :ap. in Tons pa 24 CLASSIFIER. Denver Rake Light Duty "C" Hrs. at 100 Mesh. Appral. Ship. Wt. Lb.. I lilution 4 : 1 to 6: 1. H,P, Leng,k Motor F'--- THE Denver Rake Classifier / stroke 16-20 is designed for either open or --Width Design lvedlow Raking Belt Motor l . closed circuit operation. It is 1'6" Slmplex made in Lwo types, type "C" 2'0" Simplex for light duty and type "D" 2'3" Simplex 3'0" Simplex for heavy duty. The mechan- 4'0" Duplex ism and tank of both units are 4'6 Duplex of sturdiest construction to 5'0" Duplex 6'0" lDuplex meet the need for 24 hour a day. service. Both type "C" Medium and and type "D" Denver Rake Heavy Duty "D Classifiers have a tank made 3'0" Slmplea nf heavv steel late with the 4'0" Simplex TYPO D OUPIOI Denver Rake 5'0" Duplex c~nrr~rwr seams double electric welded 6'0" Duplex both ms~deand out. Tanks are 7'0" Duplex arranged so that feed may enter from either side Rakes are 8'0" Duplex made elther of heavy steel angles welded to channnel sup-

Ports which are carried bv the actuatine mechanism---- or. than- 1 ad or subtract for each 12" difference in length. ;el irons split lengthwise and weldd- to supports, whichever type of duty the classifier will be expected to perform. Raking movement is accomplished by a cam and roller drive. Cams are mounted on an oversize shaft and driven I by a semi-steel cast tooth gear and pinion on the light duty unlt or heavy molychrome steel cams operated by machine matcan we do to help you? cut gears are used on the heavy duty unit. Mechanism sup- I ports are of the strongest possible construction and have a large safety factor to withstand severe load conditions. Also, ' the babbitted pillow block drive bearings on the light duty 1 unit and the bronze bushed drive bearings on the heavy duty unit are of ample size to handle most any overload condition. A rake lifting device, utilizing worm gears, a hand crank, and steel cables, is provided on both units and this rake lifting device is so designed that one man can quickly and easily raise or lower the rake. Classifiers can be furnished either belt or motor driven. On the belt driven type a right angle drive can be supplied if desired. The standard motor drive is V to flat with 3-phase, 60 and 50 cycle, 220, 440 or 550 volt motor. ! The standard length of "C" type simplex classifier is 14'8, 1 with widths of 1'6, 2'0, 2'3", 3'0. Type "C" duplex standard lengths are 12'0, 14'8", 16'4" and 18'0", with widths 1 of 4'0, 4'6, 5'0" and 6'0". Model "D" simplex has tank lengths of 18'4", 20'0", 21'8", 23'4", 25'0", or 26'8, with All we ask is a chance to help you and width of 3'0" and 4'0. Heavy duty model "D" duplex comes with tank lengths the same as model "D" simplex, the opportunity to work with you on and widths of SO", 6'0", 7'0" and 8'0". your equipment needs. (Continued on next page) Complete Milling Equipment From Testing . . . To Feeder . . . To Dryer. CONCENTRATOR, Denver-Buckman Tilting crank case breather. The drive is by V-belts irom an electric motor rr a gasoline engine. Either base-plate or DENVER-BUCKMAN Tilting ~ece~ver-mountedun~ts can be obtained. Automatic start- Concentrator was developed ,ILK-stopcontrol is ~ncludedon motor-driven compressors. by a .large mining company in The Typ 40 Ingersoll-Rand Compressor is a stationary, Western Canada for concen- vertical, single-acting, two-stage machine with air-cooled trating very fine high-specific cylinders and intercooler. Construction is with tapered gravlty minerals. It 1s used for roller beal-mgs on the mam shalt, "conbtant-level" oiling cas-iter~te,wollramite, schee- system which ~n-urcsun~iorm lubrication regardless of the lite, and free milling gold ores crankcase 011 level, sta~nless steel valve channels and in the 150-1000 mesh range. sprmgs, replaceable intercooler .section<, propeller type fan Denver - Buckman Tilting mounled on crankihafi, automatic -loader, and combined Concentrator is a continuous aw-intake filter and silencer. Any type ol motor, gasoline engme, or diesel engine can be used to drive the com- Ired distribution system syn- chronized In operation with pressor at rated speed by means of V-belts employing the proper pulley ratio. Compresqors can be obtained with me or more concentrator the motor direct-connected to the compressor by a flexible units. A mechanically con- couplmg. 'Ihe most compact dr~veis the "Motorrompresso~ D~nwr-Buekmnn~mlrlng con~ltrator trdled cycle of operations lor m which the motor rotor is mounted directly on the com- each unit develops a contin- pressor crankshaft, and the motor frame is bolted to the uous performance in the concentrator. Automatically fhe compressor crankcase, eliminating a flexible coupling and feed to each unlt is cut off, the unit tilted, washed by hign a common sub-base under the motor and compressor. When pressure water sprays, and then returned to its original position. ax is needed only at intervals, or an entirely automatic Five to ten units can be operated from one distributor. Cleaner circuits may be operated in unison with unit is desired, automatic "start-and-stop" control is recom- rougher circuits. mended. The table below lists the various sizes of Type 40 The Denver-Buckman Tilting Concentrator fills a definite Compressors with motor-V-belt drives. need for a unit to increase efficiency of slime sections of 1NGEKSOL.L-RAND TYPE 30 AIR-COOLED COMPRESSORS gravity plants. An extremely small operating crew, combined ipprox. with low maintenance costs and high ratio of concentration Mar. Dlmenslons have been reported by many enthusiastic users. Inches Sh~p. Wt.. Additional data gladly furnished upon request. Lbs. LWH Motor- 250 260 330 360 490 570 1180 1260 290 310 340 470 CONDITIONER AND AGITATOR, 540 905 Denver (Open Type) 980 5" & 5" & 4"x4" -1200 -See AGITATORS INGERSOLL-RAND ioxs Approx. Piston Mar, Model Dimensions Ship. DL;P;;~- Discharge Inches Wt.. Cu,Ft, Pressure H.P. - Lbs. Per M," Lbs. L W H Motor -- --- 15.~ 79 100 15 90 51 76 1805 Reliable Denver Ore Tests insure your 25-B 142 loo 25 62 28% 52 2565 mining investment. 40-B 194 loo 40 66 34 58% 3310 50-B 284 LOO 50 76?/r39 59 4130 75.B 387 100 75 79 45 58 5650 75-BH 445 LOO 75 87 47% 67% 5700 90-B 515 100 100 87 48 69% 6000 *Sea-level ratings. CONDITIONER AND SUPER-ACITATOR, Denver ( Patented I A Denver Mineral Jig or Denver DENVER t Patrnkd) Conditioner and Super-Agitator is es- "Sub-A Unit Flotation Cell In Your pec~allydesigned lor interlie agitation and aeration. It has a wrdr applicatron ah a cond~tioner,an agitator, a mixer, or Grinding Circuit Will Recover Mineral an aerator. It w11l handle any pulp or slurry, or liquid-solid As Soon As Free. combination that wdl flow through a ten mesh screen. The Denver (Patented) Cond~tionerand Super-Ag~tator is a heavy duty machine. The mechanism is sup~~rtedon a beam type superstructure which may be mounted on an open or closed tank of wood, steel, concrete, or other suitable material. The enclosed antifriction bearing assembly Recover Your Mineral As Soon And As carries the heavy duty shaft and ship type 'three- blade Coarse As Possible. propeller, wh~chmay be furnished of cast iron, rubber, or special alloys as required. Recirculation of pulp is con- CONVEYOR. Denver Belt Ore trolled by an adjustable collar on the standpipe, and by recirculation holes in the standpipe itself. In large tanks auxiliary airlift pipes are supplied to increase circulation and aid aeration. The Denver (Patented)

Conditioner-.~-~ - and SUWX-AW- tator Can be easilG starced DP""<. ,P.tE"t~d) CO,,d,l,.neT and super-~~~t~tar after a shutdown, and ac- cordingly is valuable for Dower BDI~ore conve~~ taken into consideration when batch work. Short circuiting of when used continu- figuring such installations. Us- ously is prevented by the positive feed to the propeller. ually the belt is supported at regular intervals by troughing More complete information can be obtained by writing rollers on the carrying side, while a number of flat rollers any Denver Equipment Company office. are needed for the return side.- -- Conveyor belting designed for the particular service is usually rubber covered, the upper or wearing side in many instances being further reinforced by an extra thickness of Tank Capacnry "tread" rubber which may or may not extend to the outside Cubtc Feet edge of the belt, while the under or pulley side has only a **Woad Sree thin coat to protect the duck. Duck for conveyor belting or- -- -- dinarily weighs 28 to 42 ounces and the plys from 3 to 8 depending on the factors of Iength of conveyor, width of belt, size of head and tail pulleys and the weight and character of material to be handled. Supports for conveyors are usually wood or steel longi- tudinal members properly supported on bents and braced laterally to properly keep in alignment both the troughing rollers and the return idlers. Coaveyors are a cheap. quick and continuous method of transporting the material and when properly designed give i long service. 'Machrnes l4'nlV and larger built with air-lilts **Tanks LO'nlO' and larger wth 9" staves. Additional data gladly furnished upon request. ***For V-belt dr~enagitator wth steel tanks.

46 CAPACITIES FIGURED AT 100 FEET PER MINUTE BELT SPEED The pitman is made of cast steel and water jacketed. Un- der the water jacket, a cap is so arranged that a small amount of water flowing through the chamber will effec- tually dissipate excess heat generated by the bearing. The swing jaw is made of open hearth annealed steel and it is heavily ribbed in the back, also is provided with a recess for the toggle seat. Crusher jaws are of standard manganese steel 5" thick and accurately ground on the back and sides. Crusher is fitted with hard iron false plates. The cheek plates are of manganese steel 1Vd" thick. The two toggle plates are made of gray cat iron and fit in toggle seats made of manganese steel. The tension rod is made of forged round iron connected to the swing jaws by means of an eye bolt.

*Max~mumPIZC ma~cnalnot to cr~ccd10' ; of load. tFor horsepower on lncllncd add I H. P. for each 10 feet of clcva- tlon of dlschargc end. NOTE:4 inched conveyors the marxrnurn angle should ncvcr crcccd 23' or a rlsc of 39 feet m 100 feet of conveyor length and rt is advrnablc to kee~the angle under 21°.

'Size 01 fced .penins when jaw In open 2 mchca at discharge opening. We have often been referred to as the "Diagnosticians of the ore dressing industry." Perhaps we can help you with your mineral recovery problems. Our desire is to make you "Happier, Please let us try. Healthier and Wealthier."

CRUSHER, Denver (Blake Type) Jaw CRUSHERS, Denver (Forced Feed Type) Jaw DENVER (Blake Type) Jaw THE Denver (Forced Feed Type) Jaw Crusher is ideal for Crusher is an exceedingly small propertics. A high ratio of reduction is obtamed by the strong, serviceable machine, forced feed mcthod of operation. The pitman moves on an widely used in milling opera- eccentric shaft and rotates so that the material is constantly tions, also for general crush- forccd downward through the opening. An outstanding feature of this type of crusher, is that the jaws can be set at a ing work. It is especially certam openlng and maintain th~ssetting assuring a uniform adapted to handling blocky product slze. This is accomplished by the single toggle bottom ore requiring large jaw open- pivot adjustment, which wlll not slip, but may be adjusted ings 3", 4", or 5" in size. with ease whcndesired. The massive ~roportio" of oonver (o~arerme) jaw crusher For limited tonnages these crushers will give a product the frame. cast in one piece fine enough for ball or rod mill fced, eliminating the need for of highest quality cast iron, absorbs theseverest strains in- secondary crushing. This forced feed crusher is made in three cident to crushmg. The babbitted bearings for the pitman difTerent types ns described in detail in the information on shaft arc cast integral with the frame and are water cooled. each type, which follows. The capacities of all types are the Swing jaw shaft bearings also cast integral with frame. same and are shown in the table on the following page. Denver Forced Feed law Crusher Denver Forced Feed Jaw Crusher %mze Hearing Cast Steel Frame and Bumper, Bronze Side and Eccentric Bearings. THIS type of crusher is similar in design to the Type H listed above except for having a frame and bumper made of cast steel. This steel construction makes the unit light- er per unit of size, and adds considerable strength. The bearings are all of special Iv to give maxlrnurn strength design; they are bronze and with rni~~imumweight. Thr bUrnperis ruggedly coi~structed L will stand continuous service to withstand trenwndous shock loads. Steel bumper can be w~thuutany danger of failure. The law and cheek plates are furnished if desired. The s~debearings are bronze; the manganese steel; and are completely revers~ble,thus add- bumpel. bearings are of thp antifriction typ.. This bearing ing to their wearing life. The jaw opening is controlled by arrangement adds both strength and ease of movement. The the position of an adjustable wedge block. The crushers are law plates and cheek plates are reversib!e and are of the usually driven by V-to-V but can be arranged for V-to-flat brst grade manganese .terl. The jaw opening is controlled and belt drive. The 5"xG" size and the 8"xlO" size can be by the position of an adjuslab!~wrdge block. The crusher made with sectionalized frame for muleback transportation. is usually driven by a V-to-V helt drive. but it can be ar- This crusher is ideal lor strenunus renditions. r.anged lor either V-to-flat or flat bell drive. The 8"xIO" - size utilizes a split frame and may be packed for muleback Bronze Bcarmg-Cast Stel Framc and Bumpcr, Bronze Sadc and transportation, Cast steel frames can be furnished to obtain Eccentrw Brarlngs maxrrnum durabilitv. -- Dimcnriions Anprax. TYPE "k"-~nti.F~i~ti~~Bumper Bearlngs-Bronze Slde Bearinea Crusher H.P. Flywhrel Shim Wt. .______- Sizc Required R.P.M. Dia. & Face W L H Lbs. SPECIFICATIONS ~

VI g 2" r, iz 46 i ;fL-A r,imcnsions. 1". ra z Z Irk H

CAPACITIES* (Tons pcr hour) __ - . - . -- Rmg Size (Inches) Crusher Size 3 -% % 1 I % 2% , ..-p_. __ ~ -- - -~- 2~~3y;50-150 lbs 3iix4% 500 1b5. Denver Ore Tests are made on an 5x6 75 IS 2 5 5 "actual cost" basis. This brings the 8x10 1.3 4 7 10 I2 10x16 3 9 I7 33 (0 world's finest laboratory equipment 10x20 6 16 28 44 52 and skilled technicians to your service -11x30** 8 20 36 61 80 *Lnborarorv size crusher: alloy iron frame at a very low cost. **11.,~30', ha. antl.fricrion beanngr as well as anrl-friction bumper bearings. Denver Forced Feed Jaw Crusher CRUSHER, Dixie (Standard Mogul) Hammermill

THE Dixie (Standard Mogul) Hamrnermill is very similar to the Mogul Nan-Clog in construction, but is equipped with a stationary breaker plate. Simply but sturdily constructed throughout, to withstand severe use and heavv Hammermill loads, the Dixie standard Mogul is without question the most practical hammermill in general use today. This hammermill can be operated either as a primary strength. It is ideal fo; hard or secondary crusher, and with its great tonnage per horse- crushing problems where continu~lyand ease of motion are Dower reduces materials of laree ~rowrtionto any given essential. Thc jaw and cheek plates are manganer steel, size in a single operation. and are easily replaceable. The u~liti:, adjustable by means of a wedge and screw adjustment. This unit is generally 'Capacity arranged for V-to-V drive, but V-to-flat and belt drive Sire Hopper Horae- Mlll Opening Tons power are wed w~thcaual . - success. Per Hour TYPE "J"-Antr-Friction Side and Bumper Bearings**

P ;; zi .: .: i r, cC' Dlmensionr. In. :,; :,; "2 " .,, agg - urn $2 ZB e: aa ~ -p . - ~ -~ ~~ ~~ 10x24 25-35 40 225-275 36x101.< 9300 47 72% 50% 10x36 40-50 50 225-275 36xll'j 130CO 48% 88% 51 15x24 40-50 50 225-275 42~11% 14300 59 7211 71 18x24 40-45 50 225-275 42x1I1A 14300 59 72'A 71 0verz.u ~nprox. Size Speed 1 200.250 50~13% 20200 Dimensions Shipping 15x36 50-60 60 60 89% 75 Mill R.P.M. Wenght. 18x36 50-60 60 200-250 50~13% 20200 60 89% 75 21x36 60-75 75 200-225 50~13% 24950 66 89% 86'.: 25x40 70-80 100 200-225 56x13!/, 36500 82 94% 102 32x40 80-90 100 200-225 56~13% 47000 84 96'1: 113%

CAPACITIES* (Tons per hour) C, - - -- 2 Y Ring Smcs (Inches) Urn % 1 1% 2% 3 4 6

- -- *CapacNy depmdo an krnd of rnaterml to be reduced, ratlo of reductlon, rnalsture concent, and fnnenesn

Your comments and suggestions are

'Capacities are based on material wetghcn~ LOO Ibs per cubic foot of always welcome. Please write to us. average stone with jaws set to produce 15.20% overri~eabove rms. size. **A!I antiXr~ctionbearmg crushers have atecl platr. electric welded frame. CRUSHER, Jeffrey Miracle Hammer MIRACLE HAMMER CRUSHERS (Continu&) THE Jeffrey Miracle Hammer Sire of Maximum Approximate Capacity Crusher Size Tons pel- hour Crusher is designed for the Inches of Feed reduction of large pieces and 1" and under 4" and under large capacities of limestone, 36x24 lq 69. X 8" thick 36x36 14Sq, x 8" thick shale, slag, and cement rock. 96x48 14"sq. x 8" thick Thc larger sizes are built to 42x24 16"sq. x 1u"rhick take steam shovel size lime- 42x36 16" sq. r 10" thick 42x48 16" sq. r 10thick stone, crushing it into pieces 42x66 16"sq x 10thtck I", 2", 3", or 4'' and under, in 54x30 20" Cubes one operation, the one unit 54x48 Steam Shovel doing the work ordinarily 54x70 Stcam Shovel done by two or more of other types of crushers. This enables larg- reduction of limestone HEAVY DUTY REVERSIBLE CRUSHERS and ot!ler materials to a uniform size with minimum initial and production costs. All parts are extra heavy to withstand heavy, continuous service. The Miracle Hammer Crushers arc supplied with either heavy cast iron frames or with armorplate steel frames I I I I with manganese steel liners. These crushers are provided with a hinged breaker plate easily adjustable to compensate Sire of Maximum Approximate Capacity for wear, as well as giving easy access to working parts. Crusher Inch- The large, heavy duty crushers are frequently used in 1 85% -%" Product such industries as carbide, chemical and cement as a pri- 42"r82" ( 12" to 16" 300 T. P. H. Bituminous Coal mary machine where large capacities and cubical products are desired. The Jeffrey Heavy Duty Reversible Hammer Crusher is designed especially fot reducing bituminous coal down to a product of 85? minus !A", at large capacities, for coking DECO Equipment is Designed for "24 purposes. These machines are also adaptable to the reduction of abrasive materials since they are symmetrical Hour Service." This is important be- about the vertical center line and when one corner of the cause "one hour's delay means no hammers becom- worn, it is only necessary to reverse the profit today" and with today's high direction of the rotor in order to use the opposite unused faces of the hammers. The frame is made of heavy welded operating costs continuous service is plate steel equipped with removable manganese liners and more important than ever before. provided with vertical hinged breaker plates to compensate for the wear on breaker liners.

MIRACLE HAMMER CRUSHERS

Silo of Approx. Speed Feed Aoo;ox. Crusher / Openrng Ship. H.P. R.P.M Inches Inches Wr., Lbr.

36x14 60 to 75 700 to900 18x24 9600 36x36 75 to 100 700 to 900 18x36 11800 36x48 100 to 125 700 to 900 18x48 14600 42x24 75 to 100 600 to 800 24x24 L3000 42x36 100 to 125 600 to 800 24x36 17200 42x48 15010 175 600 co 800 24x48 25000 Please Give Us the Opportunity to 200 to 250 600 to 800 24x66 36000 100 to ZOO 500 to 700 30x4154 37500 quote prices and delivery on standard 200 to 350 500 to 700 48x48 48000 300 to 400 500 to 700 48x70 66000 equipment to meet your needs.

(Continued on next page)

54 CRUSHER, Symons Cone STANDARD CONE CRUSHERS

SYMONS Cone Crushers have been used cxtenslvely ;or set- ondary crushing in metallic, -- --- 98%" nun-metallic, rock products 20 In, 5 4'2%" 4'10%'' 20 to 25 650 7,700 and industrial operations. The 2 Ft 7'2%'' 4'5%'' 5'>%;, 25 to 30 575 10,000 Symons Cone was developed 3 Ft 9'1%'' b:Z%" 6 6% 50 to 60 580 21,000 4 Ft 10'4%'' 7 6"" a::%'' 75 to 100 485 35.000 to give large capacity, fine 4% Ft IVY ,, 7'61J" crushing. The combination of 5%Ft. 12'6r: 10::iEfi: :tz ii::g hlgh speed and wide travel 7 Ft. 13'10,'t" 10'5%'' 13'1%'' 250 to 3M) 435 140,000 of the cone results in a series 7 Ft. 1 :3'10;a" 10'5%" 13'3" 25Oto 300 435 145,000 of rapid, hammer-like blows I I I on the material as it passes SHORT HEAD CONE CRUSHERS L.. .. .- -' -1 through the crushing cavity srmons Cor~Crusher and permits free flow of ma- Dimensions terial through the cavity. Size Reduct~onin size of any particle, with each impact of the head, is regulated hy the opening between the head --- and bowl at that point. A threaded arrangement of the bowl affords a quick and easy method for changing the size of product or. to compensate for wear. This adjustment can be made while crusher is operating. A parallel 150,000 zone between the lower portion of the crushing members assures uniform sizing. Frame adjustment ring and cone are made of cast steel; STANDARD CONES gears arb made of special treated steel and have cut teeth; -- all bearings are bronze; mantle and bowl Liners are man- Sire Recommended Feed ganese steel. The head and shaft can be removed as a of Mmimum Opening Crusher Discharge Sitting B unit, and other parts such as the eccentric and thrust bear- A ings can eastly be lifted out after the head is removed. - T~Pcounter shaft assembly can also be removed as a com- 20 Inch Fine plete unit. Corrae The circle of heavy coil springs, which holds the bowl and adjustment ring down firmly onto the frame, provides 2 Ft. Fine automatic protection against damage due to tramp iron. Caarse These s~rines. - comDress. . . allowine the bowl to rise the full 3 Ft. Fine movement of the head until no;-crushable material passes Coarae throuch. The springs. - then automatically return to their normal position. 4 Ft. Fine Symons Cone Crushers are made in Standard and Short Coarse Head types. They are of the same general construction 4% Ft Fine but differ in shape of the crushing cavity. The Standard Med~um cone is used for intermediate crushing. The Short Head Coarac cone is used for finer crushing. It has a steeper angle of the head, a shorter crushing cavity and greater movement 5% Ft Fine of the head at the top of the crushing cavity Medzurn Coarse (Continued on next page) 7 Ff. Fine Medium Coarse Use Denver Equipment-Standard the World Over. "No Yearly Models But (Continued on next pagp) Constant Improvement." Use Denver Ore Tests to verify or improve your present flowsheet. CAPACITIES. - STANDARD- - CONE- CRUSHERS 'Capacities in Tons (2000 Lbs.) Per Hour at Indicated Sisa Discharge Setting A with Material Weighing Denver Ore Tests are made on an of 100 Pounds Per Cubic Foot Crusher "actual cost" basis. This brings the

P world's finest laboratory equipment 20 Inch and skilled technicians to your service 2 Ft. at a very low cost.

3 Ft.

4 Ft.

CAPACITIES SHORT HEAD CONE RUSHERS

'Capacitle. in Tons (2000 Lbs.) Par Hour at In- dicated Discharge Setting C u.ith Material Wdzhine 100 Pounbs Pcr Cubic Foot 3" * S" Y," ye" M" H"

.Capacities given are neither rmnirnum nor maximum, but are a can. servahve estrmate bared on results secured in actual practice. 3 Ft.

SHORT HEAD CONES

Recc menc Feed Opening D Sire Minin of Bowl Dlrcharge 5% Ft. Crusher Setting Mimmum Maximum - 2 Ft Fine 7 Ft. Coarse

3 Ft. Fine Med~um I Coarse *Capacitm given are neither minimum nor maximum but are a con- aervative mtlmate bared on results secured in actual practice. 4 Ft. Fine Med~vm Coarre

5% Ft FI"~ Med~vm Coarre Mill design and Flowsheet design are

7 Ft Fxne also services of Denver Equipment Co. Medzum Write for details how these services coarse - might help you. (Contlnued on next page) What can we do to help you?

58 CRUSHER, Allis-Chalmers (Type R) Reduction CRUSHER, Traylor (Type TY) Reduction THE Allis-Chalmers (Type R) TRAYLOR (Type TY) Re- Heduct~on Crusher is of the duction Crusher is compact gyratory type, designed for and of simple design, which large capacity, fine crushing provides maximum strength and incorporates many im- and high efficiency. It occupies provements over other gyra- mmimum floor space, requires tory type crushers previously llttle head room and is easily manufactured by this company. and economically maintained. The most distinctive feature It is a machine of many exclu- of the Type R Crusher is the sive features, among which bullt-in, oil filled hydraulic may be mentioned: an all cast jack used for fast, positive steel frame, wlth upper shells change of crusher setting rrarlor erne TY, R~~ucI,.~crusher and spider made in one piece; while crusher is operating. a ball and socket type spring The hydraulic step support suspension; non-chokable, self-tight~r~ingbell head and also provides a convenient ... . ~nzansof unloadine the crush- curved concave, made of mangane.se steel; a patented dust - - seal, an efficient device for exc1udir.g dust and grit from in^: chamber in case of power failure or other emergency. Protection against damage the gyratory crusher lubrication chamber; a positive auto- from tramp iron is automatically provided by a relief valve matic forced feed lubrication system with water cooled oil which opens under a predetermined pressure, lowering reservoir; machlned cut steel gearing; a self contained coun- the crdshing head and allowing foreign material to pass ter shaft fitted w~throller bearings aud automatically lubri- through without stopping the machine. The crusher dis- cated; an all-around bottom d~scharge,without diaphragm. charge opening can then be promptly restored by cutt~ng For irtd~vidual requirements and rect~mrnendations you the feed, to clear the crushing chamber, and raising the should specify the kind of rock to be crushed, the size of the head by means of the hydraulic jack. The pressure at feed, size of the largest rock in the reed, size of product which the automatic release operates can be regulated by requlred the Largest and smallest product for which adjust- a convenient valve. ment is ;o be provided, whether the material is hard, me- A flexible support between the crusher and its foundation dium or soft, brittle, tough or spongy, dry, damp, sticky or eliminates destructive vibration, facilitates feeding by the wet, and capacity desired in tons per hour. gyratory motion at top of crusher, and eliminates need of Add~tionaldata gladly furnished upon request. a masbive foundation. Positive lubrication is assured, oil being pumped from a fully enclosed combination storage, cooling and screening tank by means of an electric motor - driven unit. The Type R Crusher is built with cast steel main frame Ton. Per and top shell; heavy forged steel main shaft; extra large

Hour- -. bearinas: steel eears wlth machine cut teeth: effective dust seals; and its wearing parts are of heat-treated manganew 8 steel. It has a large self-feeding hopper type three-arm 15 spider; one-piece ground-to-fit head mantle; self-tightening 53 and self-locking concave ring. Top shell and spider are 5 5 cast integral and readily removed to replace the one-piece 81 concave ring. Lower flange is taper turned to accurately 79 fit the main frame and to facilitate removal for replace- 150 ment of wearing parts. 141 - (Continued on next page) *These capacities are average ..lor ~nn... lbs .oer cubic foot ro~k.medlum hard-- Ddlerent- settlnes_ lor feed and dmcharge can be made for each sire head and concave On crusherr larger than the 1'3" dtamerer, sev-

eral rl>ffprmt. -- ~ of head and cancavn are available to ubtaln mart!- mum capaclry range Recover Your Mineral As Soon And As Coarse As Possible. (Continued from preceding page) The roll spacing mechanism may be easily and qu~ckly changed while rolls are in operation, the size of the product 'CAPACITIES IN TONS PER IiO!lR changing correspondingly, to permit positive control of Close Side product size at all times. Setting and 1 1, , g'' % G" 1 1%'' The roll cores are so desizncd as to provide a continuous --Ecc Throw bearing surface, accurately tnpered on tAe outside for mount- No. 322 9.75 14 I6 22 36 ing roll shells, assuring a positive grip-. that will not slip No. 530 1 20 5 27.5 35 51 66 when shells are worn thin: No. 636 I6-~ -5 44 64 83 InR 124 NO. 848 1 58.5 82.5 10s 13s 168 192 237 Roll shells are made ofmanganese or chrome alloy steel, depending upon the type of material to be crushed. The 'Capacities given above are based or. a feed of graded mater~al with outside faces are ground or machined true and smouth for a one-way dimension not to exceed 66 per cent of the feed opening. The table is in net tons of ZOO0 Ibs, per hour of material weighing 100 Ibs. fine grinding and rough ground for coarse grtnding The per cubic foot. Or- welgnlng more or less than 100 Ibs. will correspond- inside surfaces are accurately tapered to fit the draw-type rngly increase or decrease the capacity. All the above capactties are cores. based on crushing fairly dry, clean stone or ore with fin- removed. Proper lubrication facilities are provided and rolls are furnished with heavy steel plate housing with hopper plates *Dimensions Approx. Crusher H.P. Total attached, and doors are provided for inspection. The hous- Sire L W H Wt.. Lbs. ing can be readily removed. -- -- No 322 4'8" 3'4" 8'1%" 25-30 6,000 All types of drives are available. flat belt, "V to V", or No. 530 7'2" 4'10" 10'83%" 30-40 12.000 others, depending upon the crushing plant requirements. No636 8'7" 5'9%" IZ'll%'' 60-75 20.500 No 848 6" 7'0" 17'0%" 75-125 48.000 'Capacity: Tons per Hr. 'D~mensrons are for preliminary use only. H is overall height plus Size minxmum headroom for removrng eccentric. Machrne Slze Size Feed Product Tons LWH

CRUSHING ROLLS, Denver (Sample) DENVER (Sample) Crushing Rolls usually follow a primary crusher in the crushing section of an ore concentrating mill, and the primary crusher should be operated in closed circuit with a vibrating screen or other sizlng mechanism to Approx. Shrpping supply a correctly sized feed for the crushing rolls. The Size H P. Wt. Lbr acl~onof the rolls in crushing Machine 1 Domestic Export r-/ IS continuous and the rate at -. ~ - I I wh~chthey will crush depends ul ,)I. the I~IIUCII<1. ritth , 1 q,,,d <,f rdls 'sl,J ulllf~~rmlty .,nJ typ. of fctd Tht. c~ ah- ~n+:re11 IS ~(lt~~llysu.t~ib:<~ f~ (~u..h~tll:hit~lt, or frl,~l~lerlw I, ll<,l ,,lid pl

opnVrr(soaeud 7rpc) clllrhlnn RONIS spring pressure is so applied that nonc 1s transmitted to the ih,a.inns. Tcnsion rods kcc~thc rolls ..urowrlv -. svaced fur thr. setting required and the straln on the rod\ is all tension. The >pacing of (he roll 4~lls15 acc

Numbcr of Capsc\ty. Cu. Ft. Approx Shipping SXZC Compartrncntn of Pulp per 14 hro. Wt., Lbs.

2 toto8 LO ~~lFp,-~p40.000 510

DENVER (TWO BEARING TYPE) PULP DISTRIBUTOR*

Dimensions Approx Shipping Weight. Lbr. S1.e

Our desire is to make you "Happier, Healthier and Wealthier." May We Please Work With You On All Your Equipment Needs? DRIVES, Transmission

A~~~~~~~~~ In-molion rypa cast iron standard sheaves Vati-oiteh Drive w~thAdrunabla provide Up to 50% speed range ~otor61%~ by a simple micrometer arrangement, and will transmit the flat helt drivc on manv up to 4 horsepower. On 1- to 300-horsepower drives, vari- transmisii

,)I. flat-helt drlve The initial 101. supplying the gears wilh a r,,st I, s,~nwwhathigher than cvntlnucus bath of lubricant. the belt dnve. but this is off- Sped reducers are usrd on s~tby greater efficiency, non- many D e n v c r Equipment slip, and ohtammg a uniform Cmioanv. -. nroducts such-~. a< tu~ntnl:movement. Thcy hi.ve ~aarorlres side and centcr air-lift agitat- parttcui,rt. appltcatlon un slaw-speed drtves, espec~ailywhen ors, rt.pulpers and scrubbers. motorized speed rcducers are used. Murc romplcte information can be obtained by writing Mure ccnnplete infor~nation can be obtained by writing any Denvcr Equipment Cornpanv office. anv Denver Eauioment. . Comvanv. - office. SILENT Cham Drlve are usrd for high sp~cdpower' trans- INFOIIMATION Ilequ~red Our Eng~neering Ccpartment nilssiori up to 2000 horsepower. They have ken used suc- will gladly assist you. Send in the following information: cersfully Crn thousands of installations, and many of them 1 Iforsepowcr and type of motor, or other power source. have operated efficiently for 10, 20, and even 30 years. 2 What is the name of machinery driven? Due to posltlve tooth-to-tooth action they transmit lull 3. Ilunning H.P., startlng H.P., pvak H.P. speed and FoWer of the prtnie mover. There is no dippage 4. Describe load condit~ons; uniforniity, shock, reversal. as wlth belts. Their long wearing life with low upkeep 5. Service cunditioni temporary, interniittrnt, contmuous. expense nuke them dcslrable for many drive installations. 6 Atn~osphere:dan~pness, water, acid, oil, dust, temperature. GEA1: Drives are important 7 Shaft ;;peed> and diameters. elements of rnachlnes for 8. D~rectionaf rotation of shafts. transnutting power positively 9. Which shaft is the driver? from one shaft to another 10. Horizorital d~stancebetween ,hafts. shaft w~ththe minimum of 11. Vertical distance of shafts above floor. shaft crnters. Spur, helical, i2 Distance to walls, ceilings, bearings, ctc.. which limit and herringbone gears oper- plley, sheave, sprocket, or gear diameters, or belt widths. ate with parallel shafts; miter, l? Pulley d~ameterand width of face on equipment in use. bevel, worm and helical gears 14. Is belt to be endless or to have fasteners? operate with their shafts at 15. Desired pul!ey, sheave, sprocket or gear centers. right englc; to each other; and bevel and spiral gears Arrangrnlslit or Soil Cc,lr and Clutch may operate with their axis "..", -.nllLs DRYER. Denver Rotary at an angle other than W0. Fur transmitting moderate DENVER Rotary Dryer is a 111ads with low-rim veloc~ties cast-tooth gears are satis- simple, inexpensive unit for factory; however, with hlgh loads to be transmitted and r~,ducingthe moisture content hlgh rlnl velocities, cut-tooth gears are recommended. of flotation concentrates, as Helical, spral, and herringbone gears are always made well as chemical and industrial wlth cut teeth. Spur gears are usually cut w~th14'l'" products Frequently the sav- pressure angle. Gears w~thteeth cut with 20" pressure ing of shipping weight so ef- angle are stronger and are used especially where plnions fected will pay for thc dryer with a small number of teeth are required. The usual in a few months. Difficulties spccd ratios range from 1.1 to approximately the fol- from freezing while in transit are al~oeliminated. Many in- Iowlng for various types of gears: Spur, 10:l: helical, Drmw ~atarynryer 10.1; herringbone, 10: 1; miter, 1: 1; bevel, 6.1; wort11 160: 1. dustrial projeek are now using Where noise is objectionable, it 1s advisable to use rawhide, Denver Dryers for control and production purposes on man Y materials. bakclitr. or rome approved type of non-metallic gear in conjunction with mating gear made of metal (Conrlnued on next page) (Continued from preceding page) ELEVATOR, Denver Belt Bucket lhree main types ot Denver Dryers can be supplied. The direct heat unit is used when it is permissible for the dry- DENVER BELT Bucket Ele- ing gases to come in direct contact with the material being vators are of standard design dried. Partition plates increase the heating surface. Dry- and are well suited to handle ing may be by hot air or exhaust gases from other opera- practically all types of loose tions. If this drying gas has a deleterious effect on the materials. The frame housing product, then an indirect type of dryer can be supplied. A of the elevator can be made of further derivation is the Dcnve-Tedrow Steam Dryer. either wood or steel. The type Additional data gladly furnished upon request. and size depends upon the operating conditions as well as - - -- the material to be handled. DENVER STANDARD DIRECT HEAT TYPE IN TONS PER The sclcction of an elevator of 24 HOURS WET FEED standard dimensions (as listed ------W~thMmature an Feed Barcd on Net Wcl~ht below) saves special design Size oi Cvlrnder ------and engineering cost. Our engi- Dryer WPM 5'. 10% I 20% 30% 40% B,,cxet necring department will gladjy ~f~rta~,~rl,,I D~~IVD~ M~II cooperate with you In solving your clevator problems.

WCLOre Buckets ,Full / ";a"".. Size of Tunsbrr Hour Bu, kcts Fllll Buckets

Heat rcqucred in BTU's per 322.000 582.000 872.000 1,198,000 1.992.000 3.052.000 ton oi Wet Feed'

*Heat rcqulred ~n BTU'F for drying at 50% thcrrnal elficienry per ron or wet ired, bared on final motrture ai dried groduct of 1%. feed tem- Pcramrc 60 dcgrcer F.. discharge temperature at 212 dcgrees F. and sper~fxcheat of matcr~al0.21. I I I NOTE: Above data based on belt speed oi 300 ieet per minute and AVERAGE CALORIFIC VALUE OF FUELS IN B T U S crushed ore at 20 cubic fert equal to 1 tou. MOISTURE FREE BASIS ------Fuel Color~f~cValuc Anthractrc Coal 10 600 14,000 per pound Semr Antkraclw Coal 13.700 per pound Sem~B>tumtuous Coal I3 000 14.700 pcr pound Bltumtnoua Coal 11 000 11300 per pound Sub Bltummoua Coal 9 200 lo 600 per pound L~znlte 5 800 13,000 per pound Peat 8 700 10 300 per pound Cake 14 000 per pound Wood 8 509 9 200 per pound Fuel Oil I8 600 20 000 per pound Fucl 011 152 000 134 000 per gallon Gasolmc or Kcroxne 20 000 per pound Mlnlmum Rated 1 R P M. of Head Pulley to Give Belt Speed of Ga%alme or Kcroaenc 133.000 per allo on Srre Wecght oi 710 1 loo per cub~iloat Inches Elevator Natural Gas Belt Coke Oven Gas 400 550 per cubic foot Producer Gar 160 170 cuh~efoot 8"- 5 Ply Coal Gas 500 per cublc foot 10"- b Ply 12" 6 Ply Watcr Gas 350 per cubw foot 14'- 7 Ply 16"- 8 Ply 18"-10 Ply Recover Your Mineral As Soon And As Coarse As Possible. EMULSIFIER, Denver (Disc Type) Caterpillar Diesel Electric Sets make it possible to use he efficiency of electrically powered equipment in areas THE Denver (Disc Type) Re- ihere e!ectric power is othsrwise not available. These dies21 agent Emulsifier is used to lectric sets are self-regulated and externally-regulated. emulsify flotation reagents 'he generators are direct connected to the diesel engines with water before introducing nd are 3-phase alternating current generators. them into the rrlls. By using Additional data on the diesel engines and the diesel this unit greater efficiency is lectric sets will be gladly furnished upon request. attained from reagents, de- ~a&dRPM is the RPM'at which the maximum load in creasing the amount necessary BHP that the engine is capeble of carrying for a period of to produce the best flotation 12 hours from each cold start. results. The unit consists of a stur- 3 Phase, 60 Cycle 3 Phase. 50 Cycle -- -- .-- .- .- Set Conunuous output 12 hr. output Continuous output I2 hr. output dily conztructed tank and ------impeller. together with the lumber KW PF KW PF KW PF KW PF -.- De~ra~.(Disc Typal Emulrifler driving motor, on a strong I311 19 .8 20 .8 20 .75 23 .8 mounting bracket. The im- 1315 39 .8 40 .8 30 75 34 .8 peller shaft has a series of disc shaped vanes which rotate 1318 58 .8 60 .8 40 .75 45 .8 1364 138 .75 156 .8 118 .75 133 .8 between stationary beaters welded to the sides of the emul- 1375 174 .75 197 .8 150 .75 163 .8 sifier tank. The violent stirring action thus produced com- 1386 209 .75 236 .8 179 .75 204 .8 1397 261 .75 296 .8 228 .75 259 .8 pletely emulsifies the reagents before discharging them. I8800 50 75 55 .8 50 .75 55 .8 I13000 75 .75 83 .8 75 .75 83 .8 117000 96 .8 105 .8 110 .8

-- Brakc Approximate Full Load No. I I 1800 22 I 23" I00 195 Number HP at Dimensions Speed Approx. I I I 1 :nginc of Rated Rated In Inches Range Ship. lumber Cylinders RPM* RPM L W H RPM Wt. Lbr. *Emulsifiers for various conditions availnb!e. -- -- . --

ENGINE, DIESEL, Caterpillar CATERPILLAR Diesel Engine brings to the users of small power units all of the advantages of the larger diesel I engines. The units are available in RGed RPM is the RPM at which the maximum load in BHP that the sizes from 48 horsepower to ngme ir capable of carrying far a period of 12 hours from each cold start. ; 4s0 horsepower and are all 1 ok rugged design with com- Denver Equipment Company ' phctnG and &essibility of Caterpillar Dicsel Enaine parts built into all units. Denver Chicago El Paso New York These un~tsare available in 4, 6, 8, and 12 cylinders. The Toronto Vancouver Mexico. D. F. 8 and 12 cylinder units are 60" V-type engines. Full load speeds range from 650 to 2000 RPM. The units are complete London Johannesburg with either totally enclosed or open clutches or without clutch Mailing address: Each unit is equipped with an independent starting system consisting of a gasoline engine on, the smeller horse- , Denver Equipment Company power units and either an electric motor or an air motor an 1400 Seventeenth Street the larger horsepower units, an air cleaner and a built-in, flyball, spring balanced type governor which acts through P. 0.Box 5268 the entire range of speed. Denver 17, Colorado ENGINE, GASOLINE. Denver (Water Cooled) FEEDER, ORE, Denver Adjustable-Stroke Belt DENVER Gasoline En g i n e THE: D r n v c r Adjustable- / (Water Cooled) b constructed Stroke Belt Ore Feeder is preferred for feeding the grinding mill because of its smooth- ness of operation, uniformity of discharge, and regulation of feed. It is so arranged that it can be installed to draw the iced from the bottom or the iront of the ore bin. Various lengths are ava~lable to fit I neto, noned cylinder, and a the various requirements. _ hopper cooler. Cylinder, hop- The tonnage of feed can be , " ol,,r,r ,Wa,rr uul,.d ] per and crankcase are all cast rcgu!ated by a wide range t.rsu:,

'Fuel capx~ty,dmcns'ons. :nd chlpplng welghcs (less clutch) de~ ].end on wlxrhcr t~nkor rsdrilur coul~d Figures are for radiator rui,led unit wrthout c!utci~ on engines where either tank or radlatu: re available-lor tank cooled add approxlrnately 90 1bs.-for clutcb add approx!rnnlely 75 !bb **Deduct 3"" fol each 1000 feet in altitude for interrntttent load. Deduct 30n lor each 1000 feel tn altrrude over 3000 feet (or continuous load. FEEDER, ORE, Denver Apron (Type A) FEEDER. ORE, Denver Apron (Type J)

THE Denver Apron Ore THE Denver Type "J" Feeder is especially suited for 1- Apron Ore Feeder is espe- feeding a unilorm flow of cially suited for feeding a lumpy~andabrasive ores which uniform flow of lumpy and v ould ordinar~lydamage less abrasive ores which would durable equipment. It 1s built ordinarily damage less dur- to rc>i\t damage resulting able equipment. It is built Irom suddcn Impact and from to resist damage resulting \harp edges of large lumps, from sudden impact and and to w~thstandscvere load- from sharp edges of large lrlg condltlons. It 1s an Ideal lumps, and to withstand unit for installing under a severe loading conditions. It cuarse ore bin to leed a jaw is an ideal unit for install- crusher or a gyratory crusher, ing under a coarse ore bln D, n.l.r A,,~~,,o,, FLC~,, and due to 11s slow speed it Denver Apron ore reeder to feed a jaw crusher or a mav tn-. used ;I, .>i,~rklna bclt lor rcnwvlng tramp iron and gyratory crusher, and due driil b~tstn-.forc~ the ,,re is fed tr, the cruihing unit to its slow speed it may be used as a picking belt for remov- The Denvcr Aprun Ore Fcc,drr i~ constructed with a s:cei ing tramp iron and drill bits before the ore is fed to the frame, two strands of roller chain which supp~,rtduuble crushing unit. beaded ster,l pans, sprockets rind chain take-ups Pans can The Denver Type "J" Apron Ore Feeder is constructed tn-. furnishcd Ja" or thick ~31thor without 2" hlgh \ides with a heavy welded "I" beam frame, steel bar links connect- Stcel sklrt bo;ards can be furn~rhedif desired. Two types ing the flight roller shafts forming a continuous chain type uf feeders cnn tn-. wpplied: with or without roller-supported linkage, bronze bushed chilled face cast iron flight rollers cha~n.Uw:ji drive c<,n5i*ts nt rr Bear motor, spr

*Minlrnum capacltra ba%ed on apron speed oi 10 leer per rn~nute. ore wr~ehing 100 pounds per cuhlc foot, wlthoot skirt haaida Mcwnum cauaunea based on feeder wlrh skhrt boards fed wlth drnth of 17"

'Mimmum length, actually 8' on pans or 6' pulley centers. **M>nlmurn horsepower without skzrt boards. Use Denver Ore Tests to verify or im- ***Capacity based on matcrnl weighing 100#/ft.; minimum without skirt prove your present flowsheet. boards. Recover Your Mineral As Soon As Free. FEEDER, ORE, Denver Challenge FEEDER, ORE. Denver Plunger THE Denver Challenee Ore r - -'s; THE Denver Plunger Ore Feeder is bullt for low and Feeder mcludcs a strong cast moderately sized tonnages. iron frame supporting a small Positive feeding of the ore is welded steel hopper, and the as5urcd. as there are no gears plunger bearlng. The unit is or levers in the mechanism built so that a feed chute can which :tcrount for lost motion be easily attached to the dis- and rwulting irregular feed. charge opening. The stroke is The clutch mcehanisrn is on adjustable and ean be regu- the same shaft a< the feed lated easily. These ore feeders disk, and the hopper and disk are low priced and reeom- Yrs" Denver Plungrr Ore Feadrr are made of heavy steel plak. mended for small tonnage. Slwcify eorrrct hand when oldering. Drive is to a tight and lmw pulley from the cus- tmnc.r.'< Ilne shaft, c,r for :I nl'otor driven fe~dcra gear-motor cdn be rnountcd on a bracke,t in front of the ore bin. I Ill1 0 i *lncludrr light and loose pulleys Thc ideal drive is by means of a motor rpecd reducer with a belt drive to the eccentric shalt pulley

-- - *lncludcs t~ght.and loosc pullcvn

FEEDER. ORE. Denver Middling

THE Denver Middling Type Ore Feeder is an economical. simple unit for such operations as returning jig tailings or classifier sands to ball mill. The unit consists of a trough in which a helix turns, forcing the ore out the end of the bed Complete Milling Equipment From troueh. Sim~le construction, Testing To Feeder. To Dryer. minimum floor space, and . . . . . case cleaning make the Denver Ore Feeder an ideal Iinlt lor ;I great numbr of feeding problems. The rate of feed can be varied by simply chang~ngeither the motor. or the reducer sheave. The length of the trough can br arrahged to feed even dilute pulps or middling products. The helix is so constructed as to all<,w very rapid replacement, it being only necessary to remove two small bolts.

Please Give Us the Opportunity to quote prices and delivery on standard Reliable Denver Ore Tests ikure your equipment to meet your needs. mining investment. FEEDER, ORE, Denver Variable Speed Belt FEEDER, ORE, Hardinge "Feedometer"

~nyvariation in weight oil-the belt will tilt the frame, thereby m o vi n g the feed gate through appropriate linkcge. As the feed on the belt increases, the frame tilts down slightly and the feed gate opening is decreased If the Denver cept that a standard variabi Ore Feeder weight on the belt becomes less, the frame tends to rise and swed mechankm with reduc ~ - the gate opens wider. A constant weight is thus maintained tion gears and constant-speed motor are used to drive th regardless of conditions. A variable speed drive for the head shaft of the feeder. Any belt speed can be obtainel belt, is used to vary the rate of feed. Once set this feeder within a 2 to 1 speed variation by turning a handwhee will maintain a constant rate of discharge by weight, irre- mounted on the side of the variable speed transmission. <;pective of changes in character of the material being fed. The photo shows a constant-speed belt ore feeder em ploying a constant-speed motor, direct coupled to a worn One or all of the following featues may be incorporated: gear speed reducer which in turn drives the head shaf 1. A visual feed rate indicating meter that reads direct in through a sprocket and roller chain drive. This type o pounds, tons, kilograms per hour or other units. feeder may also be used as a picking belt. Dimensions ani 2. A totalizer that records cumulative weight fed and a shipping weight are the same as for the Denver Adjustabll reset recorder that totalizes batch or partial runs. Stroke Belt Ore Feeder. 3. A printing attachment that prints on a card the cumu- Additional data gladly furnished upon request. Jstive weiqht delwered in numerals. also a reset device for recordhg the batch weight and corresponding trans- action or serial number. The card or paper slip on which the weiohts are recorded is locked in position during the run. 4. A recording chart for the control room located at a distance from the feeder. Thi- chart indicates the rate of feed and changes in rate fed. Each chart roll will make a record covering a month's operation and is divided into hou~sand fractions thereof. 5. Remote control of the Ieed rate and direct tonnage Complete Milling Equipment From indicator of the feed rate in an infinite number of Testing . . . To Feeder . . . To Dryer. steps, through push button control and dial indicator 6. Interlocking system for two or more feeders when used as proportioning devices to maintain a constant Please Give Us the Opportunity to ratio of feed rates, with means to incorporate feed rate quote prices and delivery on standard records of two or more feeders on the same chart. 7. No-load cut-off attachment and signal to stop the equipment to meet your needs. feeder and prevent a false record being made when the feed bin becomes empty or the feed bridges over in the bin. When material again enters the feed hopper the feeder will start up automaticdly. (Continued on next page)

Recover Your Mineral As Soon As Free.

83 (Continued from preceding page)-- FEEDER, ORE AND REAGENT, Syntron Electric I Fccdcr Length Wtdth Hctght Vibratin~ THE Syntron Electric Vibrat- Slrc "B" 4'5' 2'1. 19%' sllc "C" ,$:!, %I.z ing Feeder is built on the S~zc"D" ) I $A: 1 harm simple and strong principles as the Syntron Electric V i bra to r. The vibrating Mamrnum Ca~acxty Fccdcr 85 Lbn. per Cu. Fr H P. Motors Method of Rcgulatlom of tio~~gh15 carr~ed011 two leaf SXZC ISCC No~c) Rcqutrcd Capaclty spriilgs and vibrated through ------B 12 tons per hour Up to 'i H. P. By varleblc rpccd belt drive the pulsating current oi an electro-magnet. The speed of thlr magnet is conlrolled by ;i -- -- 2--- separate electrlc contl.oller, C 150 tons pcr hour Up to 11 H. P. By varxablc%pccdbelt drive only which is Iurnished with cach Above. rombincd Wth 1 feeder. This controller is a spccd motor -- _ __ - --. - - totally enclosed unit arranged D 500 ton, per hour (2 H. P. below By varlablc rpccd bclt drive lor mounting on a wall, either 15 Tons mr hour only close to or quite a distance end 1 H. P. to 100 Ton3 per hour from the feedrr. A manually oaerated d~alrheostat controls 2 H. P. Above, comblncd with 2 SYnfron Elrclrlr Vobratong Ore and LOO Tons per hour spccd motor Reagent Frrdrr Installed the speed of the pulsating mag- I net and the flow of the feed. By a simple turn of the rhqostat in the controller the feed can be changed from a thick, fast flow to a slow, minute one. These feeders can handle practically every kind of dry feed, give accurate reagenl control; even Iced to a screen, crusher or conveyor. They can be supplied lor suspcnsion- mounting in thr larger sizes. as well a the standard floor- mounting on a heavy base. Due to construction there is no wearing of n~echanicalparts, or abrasion of trough. A varlety ot d~lierentslzes is available from the small reagent feeders, up to the "Heavy Tonnage" model, which will handle up to 1200 tons per hour of heavy ore and rock. NOTE: The mlnmum capaclty may be as low as desired (1 pound per These are also available as special "Heat Resiitant" fur- hour 11 neces,aryi but the msrtmum wll then be only the multnplc of the nace feeders, or equipped with a grizzly discharge, especially mmzmum md~ated m the "Capacity Vanation RangeM column. For a suited to separate fines from the flow of coarse material capaaty range greater then shorn, consult our eng~neerlngdeparlmenf feeding into a crusher or other machine.

D~mens~onswith I Max. Capacrty Std S~rcTrough Baecd or, Sand (Other sxzeTrouglir Approx. Powcr Denver Equipment Company publishes rrnugh Flowing arc Avarlablel iShip.Wr. con^ DECO TREFOIL, an exchange of help- Hor~ztlly- , Lbs wnPtLon ful engineering information designed to improve milling. DECO TREFOIL is I ton per hr. 60 Iz0 wattn published every other month. If you are 4 ton per hr. 120 '65 watts connected with mining and do not re- 10 ton pcr hr. 320 300wet~r ceive DECO TREFOIL please write Without F 225 25 ton per hr. 500 350watts to us. F-350 SO ton per hr. 1400 750wetts 100 ton per hr. 2650 1000 wfs. iOO ton per hr. 5800 2600 wtr.

F-0 end F-I avarfable for 110 or 220 Volt AC. F-210. F-215. F-350 avallablc for 110 or 220 or 440 Volt AC. P-4100 and F~5500available for 220 or 440 Volt AC. 8 5 Three adjustments are provided for varying ratr of feed--- FEEDER, REACENT, DRY, Denver (Belt Type) rl step-cone pullry drive permits adjustment by speed change, an adjustable collar on the hopper bottom allows for DENVER (Belt Type) Dry lull range of f-cd rate at earh drive speed, and the scraper Reagent Feeder is particularly may be set to cut any desired width of reagent from the well suited to feeding re- rotating disk. This allow.: very accurate feedlng through agents, such as lime or soda a wide range of Ieed rates as all adjustments are positive. ash, which become lumpy or stlcky and tend to clog hop- A coarse screen acrms the per typc feeders In any but a top ot the hopper prevents

Denver (F,c,, Dry very dry climate. Also, any lumps entering whe!~ filling. ~~~4.~drv<. reaeents used in very and a st~rringrod attached to small quantities, such as zinc the rotaling disk insures a dust in cyan id^ precipitation, are most conveniently and ac- rmoolh gravity Row onto the curately fed by th~sbelt type feeder. disk. A rib or scraper on the Continuous test laboratories require ore fed at the rate underside of the rotatlng disk of 100 to 200 Ibs. per hour while reagents must be fed in moves ihe reagcnt falling into very small quantities. This unit is ideal for both operations, the pan under the disk out to providing accuracy essential for uniform results in labora- the spout ;or discharge. tory test work. A step-cone pulley drive controlling speed of belt, skirt The Denver (Cone Type) boardi sdiustable from center to edge of belt to control Dry Rragent Feeder is of all width of feed, and depth of reagent on belt. provide three metal construction r i g i d l y adiuslments for accurately controlling quantity of material mounted on a steel base. Ho- fed. Drives for hiqher belt s~eedscan he provided to in- tafing disk I,: mounted on a crease capacity. Preswd-steel head and hil pulleys, and totally enclosed vertical speed habbitted bearings ensure re!iab!e, continuous operation. reducer which is driven by a On motor driven feeder the fractional horsepower sleeve- Denver (Cone Tme) Dry Reagent motor and step-cone pulley bearing motor and speqd reducer may be mounted on the Feeder drive. Standard mntor driven ton. side or bottom of the unlt. unit is equipped with a % H.P. single phase, GO cycle, 110 or 120 volt. 18Di) r.p.m. sleeve Approximate bearing mv:or. Thii durable construction assures depend- Shippin. Wcighf able, troubie free operation with a rnrnimun~ of attention Pounds by the oFerator. I---

Shipmng M~:,"d"mj Dimensions H.P. Wr., Lbs. Lbs. prr - ~ Hour /

*Capacity ieedln~2" dew with skm boards at mamrnum width. **Belt hven unlt furwahcd with speed reducer btlt wzthaui drive pulley. NOTE: Data rquxred to determtnc size and type feeder includes: mill tonnage per ZI hours name of reagent. reagent feed in Ibs. Per 'Belt driven "nil furnished with speed reducer bur w,rhout drive pulley. ton mdl lecd or rolutmn, an> type of drive ~ithelectrical characteristics NOTE: Data r~quiredto determine sire and type feeder inrlildes. mill tonmge per 24 hours, name of reagent. reagent feed in lbr ran mill feed ar so'ulmn, 2nd type of drive with electrical charar:er~sucsper FEEDER, REACENT, DRY, Denver (Cone Type) DENVER (Cone Type) Dry Reagent Feeder is the most A Denver Mineral Jig or Denver commonly uied feeder for dry reagents except for those that ab;orb moisture readily and tend to hecome lumpy "Sub-A" Unit Flotation Cell In Your or sticky. This feeder is lower in cost than the belt type Grinding Circuit Will Recover Mineral and is compact and easy to install ahead of ba'l mill, over a conditioner or in anv other part of the circuit. As Soon As Free. (Conrmued on next page) FEEDER, REAGENT, DRY, Denver (Zeigler Type) FEEDER, REAGENT, WET, Denver

DENVER (Zcigler Type) Dr I -"1 TODAY mill men are contin- Reagent Feeder is a cam-acl uated shaker feeder whic consists of a pyrainid-sha~ welded steel hopper support^ on a welded steel fritmewor The cam-actuated shakir pan stroke can be varied 1 means of a screw. Motor ar speed reducer on the mot(

driven type are mour~tedon ~ -~-.-.. .-. . .-..-... welded steel base that ly placed near the grinding or'flotation cirkit as required. bolted to the feeder fram The Denver Wet Reagent Feeder is eaui~wdwith a This unit iq easily regulate revolving disc, carrying a variable number 'of'&s around for accurately feeding dl its outer rim. M~crometeradiustment is easilv and auicklv Denver (Zcinlrr TYDe) Dry Reagcnt reagents and is a simple, ine: made with a convenient handwheel which moves the Feeder pensive feeder. drip trough in or out to increase or decrease the amount of reagent caught in the trough, giving accurate control of reagent fced. The speed of the disc may be varied if desired and a float valve is provided to maintain constant level of reagent in the tank. Adjustments have been reduced to a minimum to simplify control. A tank cover is furnished on the No. 12 size to keep reagent clean. The Denver Duplex Wet IBCI~driven unit folniihed wth speed reducer but without diive pulle NOTE: Da:a required to detetmine size and type fceder includes: rn tannage per 74 hours, name 01 rcagent, reagent Iced in Ibs. per tc mill feed or po:ution, and type of driuc with electrtcal characteristi< feeders on a single base and , driven by a motor through a

' vantages of two simplex feed- 12" OuPler Denver Wqt Rsawnt ers are thus secured at only a Feedw with Cover8 Removed Mill design and Flowsheet design are slight increase in cost. also services of Denver Equipment Co. The No. 12 Denver Wet ~ea&ntFeeder is ideal for use in laboratory continuous test plants and mills up to 150 Write for details how these services tons and larger, depending on reagent feed rate required. might help you.

I I I~ 'All feeders are furnished as standard for operatan at this speed unless Use Denver Ore Tests to verify or im- othcwise specified. prove your present flowsheet. '*Number of cups furnished as standard. No. 12 Simplex, Denver Wet Reagent Ferders can be furnishrd for feeding up to 2000 c.r. per minute. Acid feeders arc also availablr. Complete Milling Equipment From Testing . . . To Feeder . . . To Dryer. Overall Appro. No. 01 Overall Marhmc Cumpar! Dimensions Sire nicntr .. LWH Belt Metar No. I2 3 b2 ' 20'' 16'' 82" 20" 16" 5 b NO.24 I 4 5 b No. 36 3 4 FEEDER, REACENT. WET. Denver Multi-Cornp'tm't

I/ wh<,ri, n wntral ~rointof re- FEEDER, REACENT, WET, Denver Special

c I ,111 ~LXIjllke' FILTER, Denver Clarifying Use Denver Ore Tests to verify or im- THE Denver Clar~fyingF~lter IS used to relnove lurb~d~ty prove your present flowsheet. from practically any liquid It can Lu. used 11, wmc,ve either suspended solids or colloi&l and dissolved sollds. w~ththr appropriate valve assembly to a vacuum system, causing the aid of an adsorbing agent. In proper segments to be under suction at the right time. The certain cases a filter bed of exclusive gravity drainage feature of this filter gives the porous material is used having driest possible product. All filtrate drains by gravity down decoloruing proprties. the grooves in the disc segment to the dramage pipe and In the majority of cases in out the valve, before di'scharge of the filter cake. metallurgicrd plants the filter The capacity of a filter depends largely on the nature bed is conlwsed of a sand of the material to be filtered, particularly the amount of which i; one of the interme- fine material and slimes and the percent solids. The follow- diate milling products. i.e , ing capacities are average: classifier return sands In the Copper flotation concentrates: gr~ndingcircuit. 150 to 300 lbs. per sq. ft. per 24 hrs. ~h~ clarifying filter is of Lead and zinc flotation concentrates: ocnrer c~~~~r~~~~rmsr simple cunstruction, consisting 300 to 630 Ibs. per sq. ft. per 24 hrs. WOI~Sand 8ed of a tank of suitable material Cyanide tails: of relatively shallow depth 30 to 600 Ibs. per sq. ft. per 24 hrs. equipped with suitable superstructure supporting a central Coal flotation concentrates: shaft and spiral scraper to scrape the film of removed solids 1500 Ibs. per sq. ft. per 24 hrs. from the surface of the filter bed. Th~sscraper can be Barite: lowered a fraction of an inch at a time by an adjustable 3000 Ibs. per sq. It. per 24 hrs. handwheel lifting device. The liquid is removed by a wet vacuum pump connected The foregoing figures indicate the large variation in filter to the area below the filter bed. capacity, depending upon the material. Laboratory leaf In special cases a supporting crushed rock bottom may be testSshould always be made to determine the filtering rate used to carry the filter medium where acid solutions are of a particular m3teria1, the size filter required for a given king handled and the ent~remechanism is made acid proof. tonnage, the o~tinlunlsgeed, amount of moisture to be ex- The mechanism and superstructure can be adapted to any pected in cake, and the size vacuum equipment required. In certain instance; tanks have been suitable sized tank. Additional data gladly furnished upon request. employed using static head mstead of a vacuum pump. Additional data gladly furnished upon request. DENVER DISC FILTERS Eliertivc Tank Average Depth of Sze Fllter Area S4. Ft. Sand Bed- 11" 1'4' 1.8- 2'7 ' 3'5" 4'10 4'9" 4'6"

FILTER. Denver Disc

Use Denver Equipment-Standard the World Over. "No Yearly Models But Constant Improvement." rwo D,.O r, oonrerolrc F,I~ w~tha &itable filter medium and are connected through an 92 FILTER, Denver Drum DENVER DRUM FILTERS FILTER (Contnued from previous page) DENVER Drum Filter will 'Machine +cap, Approx. successfully dewater finely Size T~~~ ~il~~~Dimensions W%$R,-t ship pin^ ground materials such as flota- per 24 ~rea ------Vac. Wt. Lbs. Dia. Lgrh. Hours Sq. Ft. L W H Equ~p. Belt Motor tion concentrates and cyanide -- :: ;: I 9 4'3" 4'9" 3'10" 'A tailings, so as to secure the 2-3 I8 5'3" 4'9" 3'10" best washing and drying of ..the ' 23 19 4'5 6'0" 4'10" % filter cake. The capacity, 3-5 25 4'11" 6'0" 4'10" 1 moisture content, and the na- 4' 4' 7-8 4' 5' 8-11 62% 7'11" 6'0" 4'10" 1 ture of the cake depend upon 4' 6' 10-13 75 8'11" 6'0.. 4'10" 1% the physical characteristics of :: 54; ;Wi; 75 8'4%'' 8'9" 6'10" 2 95 9'6%" 8'9" 6'10'' 3 the material handled. T'nese 6' 6' 20-30 113 10'83K 8'9" 6'10.. 3 Denver Drum Filter with O~rillntln~ factorS can best be determined A(ilator 'Filters of 8'. 10'. 12'. and 14' diameters are available by laboratory testing. tBased on 300 Ibr. per rg, ft. of filter area. Capacity may be increased 75-100% when thickening is used ahead of filter. Denver Drum Filter is of all metal construction with cast iron filter segments bolted to heavy steel ends so that the leakage and warping, so common in wooden types, ij elm- FILTER. Denver Pan inated. The segments have the drains so sloped that the filtrate flow: rapidly to the pipe connections at the end. !- - 1 THE Denver Fan F~llt~rhas An oscillating agitator in the bottom of the tank keeps the ( been designed primarily for pulp in suspension, and a repulper can be furnished for the 1 1 application to filtering prob- discharged cake. lems requlrlnx capacities be- The valve can be arranged for drawing off two solutions tween tho

Dimensions ~~~~a~.Shipping Wt., Lbs. Machine / Size Domestic Export FLOTATION CELL, Denver "Sub-A" Unit No. - Motor tBelt Motor tBelt Mot +Belt THE Cenver "Sub-* Unit 25 2'1" 1'8" Flotation Cell, w h e n in- 50 7' 2'2" 100 2'10" 2'6" stalled in the grinding circu~t 250 3'6" 3'0" between the ball mill and 500 3'1 !," 3"'6 750 4'3 classifier, makes possible the 1500 quick rccovery of coarze free I mineral, which is a vital fac- *Initial feed to grmdmg circuit. tor in economic mill operation. tNo. 750 and No. 1500 sires not avatlable far belt dr~ve. Slime losses from overgrinding are reduced to a mlnlmum FLOTATION MACHINE, Denver "Sub-A" with the use of the Denver "Sub-A" Unit Flotation Cell, resulting In increased metallurgical ~fficiency.inill costs me is proven by its world are lowered due to the fact wide acceptance and applica- that this machine provides ,an llun smce 1927. During the oenrrr -sub-n unit Flolatlon Cell efkient means of reducing the intervening years impove- load on the mill circuit. When rnents in des~gnhave been in- mill heads are a var~ablefactor, as they usudly are, this corporated to b~tter metal- unit provides for a satisfactory method of ironing out thex lurgical results and, at the variations, r?sul:ing in better mill control. This machine is 5arne time, structural and adaptable to practically any mill circuit and is universally wearing qualities have been used In the treatment of such ores as cooper. lead, zinc, iro.7. improved. These changes can be applied to earlier machines go'd' and silv (Continued on next page) at low cost, without difficulty. (Continued from preceding page) Pulp level control is by means of conveniently located extra-wide weirs which are adjustable with either hand- The design of the Denver "Sub-A" Flotation Machine in- wheel gate, gear gate or wood weir blocks. These easily ad- corporates all of thc basic principles and requirements of justed weirs control' the pulp level, and froth removal is flotation. With its distinctive design, the Denver "Sub-A" facilitated by froth paddles. Flotation Machine is the only machine that will succe~sfully handle all types of flotation prob!ems. Its wide acceptance Lknver "Sub-A" Flotation Machines are furnished with either V to V heavy duty drives from veytically mounted ball in all branches of metallic, mn-metallic and industrial bearing motors, or with the belt drive type in the smaller flotation is evidence of its basica:ly sound qualities. size machines. Standard belt drives are quarter twist V belt Denver "Sub-A" Flotation Cell has many distinctive fea- to grooved pulley lineshaft for multi-cell installations. tures which make it the univers:rl flotation unit. These Recent improvements can be adapted to the earlier Den- distinctive features are: ver "Sub-A" Flotation Machines and, if required, the hand 1. Handles Coarse Material--The patented gravity flow of the machine can be reversed in the field. principle assures positive circulation of all pulp frac- Denver'Sub-AnFlotation Machines are moderately priced, tions. There 1s no bedding or sanding. due to standardization and quantity production. Svecifica- 2. Aeration Can Be Controlled--For slugg~sh pulps the tions are varied to suit particular conditions and spxial supercharging principle can be adapted to any Denver features are added to the machine at sli~htadditional cost. "Sub-A" Flotation Machine to increase the degree of Every machine is factory assembled and carefully labeled, intensity of aeratmn. Likew~se,with this feature the to facilitate quick and accurate re-assembly in the field. amount of aeration can he decreased when required. Assembly details are furnished with every order. With standard operation alr is drawn down the stand- Additional data gladly furnished upon request. .- pipe and partition. 3. No Short Circuiting-Machine design allows pulp to Cu. Pt. pass through each and every impeller or a portion to bypass through partition openings. This flexibility gives the operator a unit cell machine, or the "open tank" machine, by a quick adjustment while in operation. 920 45 4. Middling Return by Gravity-The exclusive Denver "Sub-A" design allows rougher, cleaner, and recleaner products to be returned from one cell to another by gravity, hence no pumps or elevators are required. 5. Positive Cell Control--A minimum of operating attention is required as the quick pulp level adjustment keeps the machine in balance for any feed variation. The stationary hood and air standpipe with wearing No. 21 D; 38.~38. 1 50 / . . 1 3.8 / . . . . 1 2750 / plate, protect the impeller from sanding and eliminate No. 24 ) 43'143. 1 50 1 . 4 5 / . . . . 1 3200 / 185 the necessity for drainlng machine after shutdown. 6. Selectivity-Selective flotation is a noted feature of the Denver "Sub-A" Flotation Machine and is a result of 'Belt drive not furnished on size No. 21 machine or large the combination of machine features. The high selec- *Tons/24-hrs. *Tons/ZI-hrs. *Tonsmelting. No. 12 25 45 35 70 45 95 Standard Denver "Sub-A" Flo:ation Machines are built No. 15 / 35 65 / 50 95 1 65 125 with heavy steel tanks and rigid su~erstructures The superstructure supports the heavy duty shaft assemblies in their individual, totally enclosed, bearing housings. The cells are protec'ed against wear by cast iron side liners and rub- No. 21 105 215 160 420 215 425 ber bonded to steel bottom liners. The wearing parts can be either alloy iron or pressure molded rubber. The pres- No. 21 D 125 250 190, 380 250 500 sure molded rubber wearing parts are a distinct feature No. 24 125 250 190 380 250 500 of Denver "Sub-A Flotation Machines. This type of construction has been applied to Denver "Sub-A" Flotation No 30 270 535 400 800 535 1070 Machines since 19'32 and is used for impellers, wearing *tapacity figures in dry tons of ore per 24 hours, base for bath slow (PO minute treatment time) and medi plates, and replaceable sand relief bushings. The impeller treatment rime) floating ores. SpccSic gravity of dry shafts are protected by means of rubber shaft sleeves. (Continued from preceding page) mechanism in a free-flow, straight side, double overflow tank with adjustable froth discharge height. Size Z-C~II Parts for the Super Rougher are interchangeable with those of the standard Denver "Sub-A." Except for tank design, froth paddles and weir assem- No.15 5'10'' blies, the details of the Denver "Sub-A" Super Rougher No. 18 6'4'' No. 18 Sp. 7'1%" Flotation Machine are identical to those of the standard No. 21 8'4%" Denver "Sub-A," One adjustable weir partition is furnished No.21D 6'4%'' 17'8" No. 24 9'4" 17'8" on the end cell and one is normally furnished for each four No, 30 11'11%" 22'9" cells in the machine. Weir assemblies are interchangeable with those of the standard Denver "Sub-A." Multibladed - Length Width impellers and diffusers are standard for this machine. Machine B~I~or Motor Height Sire 6-cell 8-cell *Belt Motor - The Denver "Sub-A" Super Scavenger No.8 102 3'5' 4'7%" 1%' 2'11% 4" 4'7111'' This special machine, built to order, has a double impeller No. 12 14'4" ISl0'' 5'8%" 4'7&" No. 15 15'10" 20'10" 5'10'' 4.5%" mechanism. The mechanisms can be supplied with or with- 6's' 4.1 1 h:' 5'1%,: No. 18 17'4'' 22'1~" out tank. The tank is an adjustable double overflow, No. 18 Sp. 19'7%" 25'10" 6'7" 5'0% 5'7& No. 21 23'2% 30'7" .... 5'5%" 6'8%" straight side tank without weir assemblies except on the No. 21 D 7.6'0" 30'7" .. 5'5%" 7'8%'' 2V0" 34'4" 5'9%'' 6'1 I Y.'' last cell. No. 24 7'1 I %" No. 30 33'6%" 44'4'. '7%'' This double-impeller assembly is designed for maximum aeration and agitation. Frequently it is advisable to install Length these scavenger mechanisms in the last two cells of a Machine Bclt or Motor Width Height rougher circuit to obtain maximum recovery. These mechanisms use standard wearing parts and the parts and assembly are interchangeable with the standard Denver "Sub-A" Mechanism. DIMENSIONS AND SPECIFICATIONS Denver "Sub-A" Super Rougher and Denver "Sub-A" Super Scavenger Flotation Machines

I *Belt drive not furnished on size No. 21 or larger. Denver "Sub-A Super Rougher Flotation Machine

No. 18SpR (32x32) 15.6 1-1800 5 7% 2'-8" 4'-1V 6'-1" 11'.6" 16'-11" No. 21-R -(38x38) 30.0 1-1800 7% 10 3'.2" 5'.11" 7'-0" 13'.V' 19'.9" Nn 24-R

Approximate Shipping Weights per 2-cell machines. with motors: No. 18 Sp-R (32x32) 2900 Ibr.. domestic rhip.. 3300 Ibr.. cxport ship No. 21-R (38x38) 3850 Ibs.. domestic ship., 4400 lbs.. cxport rhip. Denver "Sub-A" Super Rougher Flotation Machine Xo. 24-R (45x43) 4900 Ibr.. domestic ship.. 5600 Ibr.. cxport rhip. Large tonnage rougher.flotation installations use the No. 30-R (56x56) 11400 Ibr.. domestic ship., 12600 Ibs, export ship. Denver "Sub-A" Super Rougher Flotation Machine. This machine, specially designed for coarse flotation and high capacities, uses the standard Denver "Sub-A" impeller FLOTATION, Coal, Denver "Sub-A" (Lasseter Type) Standard Denver "Sub-A" Flotation Machines with double overflow are recommended for -28 mesh coal fines. THE Denver "Sub-A" prin- If the coal feed contains an appreciabie percentage of ci~leof flotation, when ao- coal +ZB mesh up to '/a'' in size, the Denver "Sub-A" plied to the cleanin* of coal (Lasseter Type) Flotation Machine is recommended. fines, effectively separates clean coal particles from Denver "Sub-A" Flotation is standard in practically all high ash mater~als.In many commercial coal flotation plants throu~houtthe world. applications the standard Denver "Sub-A" Flotation Machine is adequate. How- FLOTATION, Denver Supercharger ever, in certain cases the physical characteristics of the coal froth is such that special provisio.ns must be Denver "Sub-A" (Lasreter Type) made for removing the heavy matte of coal from Coal flotation Machine the surface of the machine.

This has~ been~ accom~lished the Lasseter tv~eof froth removal rakes speciali'y designed for coarse coal frotation. Denver "Sub-A (Laseter Type) Coal Flotation Cells have stainless steel ounched plate rakes attached to chain drags. These rakes pull the heavy matte of coarse coal from the surface of the machine to special spitzkasten overflow. Drainage through the punched date rakes permits a lower moisture in the clean coal fmes. Denver "Sub-A" (Lasseter Type) Coal Flotation Machines are constructed as 2-cell units onlv. Each cell has its own motor drive. Any number of 2-cell units may fered for installation where be bolted together to meet flotaiion objectives. low first cost is desired, will deliver reliable air service in Denver Equipment Company has pioneered in the flotation pressure from 4 to 16 ounces and in volumes from 110 to 2350 recovery of coal fines and we have many publications on cubic feet per minute. Multi-stage machines are available recovery of coal fines bv flotation. Please let us know your that furnish pressures from 8 ounces to 2 pounds and in interest so we may send these helpful engineering bulletins volumes up to 20,000 cubic feet per minute. to you. Mechanisms of Lasseter Flotation Machines are standard Denver "Sub-A" Flotation Machine mechanisms. Neoorene AIR REQUIREMENTS FOR DENVER "SUB-A" SUPERCHARGED PWTATION MACHINES wear in^. parts are standard to withstand coal flotation reagents. (Continued from previous page) ~aboy&or~tests can quickly determine the esonomic advantage of recovering coal fines. Complete information will be Machine Air Regd sept an request. Sire Per Ccll Denver "Sub-A" (Larsetrr Type) Coal flotarion Machine No. 8 (16.~16') 3 No. 17 (22k21') 10 Machine Motor HP Aooroximatc No. 15 (14.~24') 12 Size Conrtruct%an Per Cell* Cell Volume No. 18 (28'118') 18 -~ ~ ~ i No. I8 Special I No. 30 2-cell units 7 % 100 cu. It. (31.x31') 24 (56x56) No. 21 138'=38') 40 No. 14 (43543') No. 30 (56'156') , i! 10050 Shippinp Weight 1 Per 2-Cell Unit L W H - 12,200 Ibr. (Domestic) 11 '6" 1 1 '3" 7'11" !3.400 Ibr. (Export) Reliable Denver Ore Tests insure your

*In additton. one only X HP motor per cell is used to oowcr froth mining investment. removal raker. Use Denver Ore Tests to verify or improve your present flowsheet. FURNACE, Denver Melting FRAMER, Denver Timber DENVER Melting Furnaces efzciently DENVER Timber Framer is a necessary piece of equipment meit brass, bronze, copper, aluminum, gray iron, terro- for any mine usine considerable mine timbers. manganese, gold and silver precipitates, and can also bc The Denver Timber Fkamer consists of a head frame rom- used for smelting and refining grindings, horings, wash prlsed ot a rlgld horizontal ~netals, and various ores. No crucibles are used. These cross arm at the top of a ver- furnaces are similar in construction, having chambers split t~calextra heavy steel rol- 1ong:tudinally and hinged on one side so that they may be umn mounted on a heavy cast easily opened to replace linings. Charging and pouring Iron base The r~g~dhor~zontal openings have hinged lids and vents. A low pressure burner cross arm at the top of the is provided for each unit or at opposing ends on each column supports the dl~vlng chamber of the double chamber type. Either gas or oil motor and shaft for the rlp burners can be supplied and fuel can be oil, natural gas, saws for hor~zontalcuts Two city gas, or producer gas. Air pressure and volunle required separate cast Iron arms on the will vary according to the duty of the furnace. These units colunm support the ~ndlv~dual are of durable construction and simple to operate. Initial dr~vlngmotors and the cross installation and operating expense is com~arativelvlow and cut saws whlch make the I range of capacities are available to meet thi need of vertlcal cuts Arms are ad- practically every size plant. ]ustable vertically by means Additional data gladly furnished upon request. of handwheels A structural steel guagc stand and a tun- THE Smgle Chamber Melting her carrlage w~tha steel ball Furnace is so constructed that supported turntable mounted the metal is melted directly on a truck runnlng on ralls IS on the lining. The shape of also supplied. Denver Timber Framer the furnace lends itself par- The machine is equipped ticularly to the refining of with saws, belts, counter- precious metals as there are shaft. etc. The Denver Timber Framer will handle lop as no corners in the lining in large as 30 inches in diameter. and 10 feet long. The unit which the metal can collect. requires a space 12 feet long by 12 feet wide and 10 feet This low capacity furnace, high. The shipping weight is 7,WO pounds and total re- UP to 250 Ibs. per heat, is quired horsepower is 30. ideal for small cyanide or Additional data gladly furnished upon request. other plants where a larger furnace is not needed. This unit consists of an egg shaped, lined, metal shell or I I chamber mounted horizontally Use Denver Equipment-Standard the S8wle Chamber hlellilll~Furnace on' two undercut stands World Over. "No Yearly Models But which set on a cast iron base as a unit. The chamber revolves freely on rollers actuated Constant Improvement." 3~ a worm gear and handwheel. A 5-inch thick lining of "arbofrax No. 3 (Silica) is supplied as standard. The iiametcr of the chamber is 17 inches and the diameter of he charging opening is 9 inches.

I'HE Double Chamber Melting Furnace is really two of the Standard Single Chamber Furnaces in one. It is two :hambers with each chamber consisting of an egg shaped, ,mcd, metal shell. The chambers are mounted horizontally In line on a scruclural steel base as a unit. Each chamber (Conttmied on next page) (Continued from preceding page) SINGLE CHAMBER MELTING FURNACE is revolved independently by . .I ! msans of a woim eear- and

OZ. - 1% - 2 'Data shown on fuel oil consumption and air required is based on melting 100 pounds of ordinary brass mixture. DOUBLE CHAMBER MELTING FURNACE Capaclry *Fuel -Air Required Dimensions p~z~,Export Pounds Consumption Cu. Ft. Pres- - - Volume 1 1 .,y I .1 Cu Ft, ocubla Cilrrnber nsltinn Furnace the second chamber for melt- Ing while the refining pro- *Data shown on fuel oil consumption and air reguired is bared on melting ceedc in the first chamber Thus. owrating ~rocedurescan 100 pounds of ordinary brass mixture. be alternated, providing additional "se of 'the hot gases in pre-heating and alternale charges. The economy of this method &self-evident as melting is practically cbntinuous. Dimensions As this un~tconsists of two Single Chamber Furnaces incorporated into a single unit, general specifications are the LW H same as for Lhe Single Chamber Melting Furnace.

THE Simolex Meltine Fur- ~ ~--~ nace ranges in capacity from 500 Ibq. to 6,000 Ibs. This clpacity makes it suitable for 'Data on fuel consumption is on the basis of o~lfuel required to melt the larger cyanide or precious 100 Ibr. of brass mixture: oil to be supplied at 2.5 Ibr. pressure, using metal recovery plants. The air at a pressure of 12 ounces ~rovided by a blower at a rate to rne!ting process in this fur- maintain uniform pressure. nace is accomolished by radiatzd heat with no flame slriking the metal directly. The Simplex Melting Fur- nace is m?de of steel plate

with cast iron heads~~~~~~~ and with~ a cast steel collar around the Sim~IexM4lina Furnsca pouring opening. It is equipped with a lined cast iron door which clamps down tight on the steel collar when the furnace is in operation. and is easily manipulated by means of a lever located at the rear of the furnace. The chamber rests on undercut cast iron slands which are bolted to a heavy bed plate. The furnace revolves easily on steel rollers, actuated by means of a handwheel driven worm and gear. A Carbofrax No. 3 (Silica) lining, varying in thickness eccording to the size and capacity of furnace, is furnished All we ask is a chance to help you and as standard. Other lining materials may be used, however, the opportunity to work with you on and lining the furnace is a very simple operation. If de- sued, a lining of fire clay tile can be used. Full instructions your equipment needs. for lining are furnished with each furnace. If manual oscillation is impractical, such as on the larger capacity furnaces, a motor driven oscillating device may be furnished. Also, furnaces are available with power drive controlled by push button or automatic controls. FURNACE, Denver (Tilting Type, Oil) Melting THE Denver Retort Conden- ser is made of iron with a I I D E N V E R Meltine- Furnaces water jacket. The inner tube have been designed for melting is threaded to the retort out- gold and silvcr bullion. cya- let. This unit is very useful in nide precipitates, brass, copper, mercury retorting and mini- and other nun-ferrous metals. mizes the danger of mercury The patented linings are made poironing. Tube diameters are d the most refractory fire clay, l?;", 1'2") Z", and 2%"; give n~aximurnsupport to the weights 10 Ibs.. 11% lbs.. 13 crucible In all posit~ons. and insure unilorm distribution of heat. These fur n a ce s are Press, shown in the illustration, is used for pressing excess mercury out of amalgam. spillage Details on this accessory are given under, "Amalgam Press. The standard furnace is supplied with a Denver low pres- Denver." sure oil burner and motor blower, but it can be furnished Capsctty with a high pressure burner or a gas burner. If no electric- Model Sh~pping ity is available, a belt driven blower can be supplied. The complete furnace includes a low pressure burner, a black lead crucible, a 30 gallon oil tank, air and oil pipes, anJ fittings.

Fur Approx. GATE, Denver (Rack ~d Pinion) Bin I /_ , . _- DENVER (Rack and Pinion) Bin Gate consists of a steel plate door, steel shaft, cast iron guides, hand wheel, pawl, lack, and pinion. These parts are all built of the best ma- FURNACE. Denver (Gasoline, Oil) terials, carefully m3chined Retort or Melting and as.;embled. This type of gatts meets the need for a DENVER Retort or Melting simple means of control of Furnace is made in two stan- flow of dry materials from a dard sizes and can be supplied bin. Rugged construction of for burn~nggasoline or fuel rack and pinion assurei long 011. The retort furnace includes Denvcr (Rack and Pmoon) Bin Ga operating life. all furnace parts shown in the illustrations except retort. condenser, and am n l g n rn pre*. The oil-fired furnace includes a burner, motor I hlowrr nil tank niw fittines.

includes a burner, blow-pipe tank, pipe fitting, and one length of clay-lined stack. These Denver Retort or Meltlng Furnaces are also furnished a? either oil or gasoline fueled melting furnaces Our desire is to make you "Happier, Healthier and Wealthier." GATE. Denver (Radial, Duplex and Undercut) Bin TYPE "A" DENVER RADIAL BIN GATES TYPE "A Radial Bin Gate is Throat Flange Approx. Shipping Wt. Opnq Dimension. designed for attaching to the Pound. horizontal bottoms of bins. The 8. 1 8' 13' r 13' quadrant swings freely and is 10'. 10' 16' x 16' 140 self-closing. me quadrant cuts through the stream of ma- 12' r 12' 18' x 18. 175 terial to stop tne rlow with 14' x 14' ?Oh' x 20%- 275 no chance lor large lumps to 16' x 16' x foul the closing action of the 22. 22. 260 gate. 'l'he throat I, a heavy 16' x 20' 22' r 26' 330 casting and lever may bc turnlsned cast integral witn TYPE "8" DENVER DUPLEX BIN GATES the side plates or as a separate swet Dar on most slzes. Thrmat Flsnge Type "ij" Duplex Gate is -%xning---- ~- Dimmsiona opened by a downward movement oi the lever and closed 12.x 12. 17!C'x 17%' oy gr.avity when released. The 16.r 16' 23' r23'

Trla "A" Dtnrer R2dlll 11011 Gale two gate plates are opened IS' Dmm. 23 58. Dtern. 1x1 unlson by the gear segments attached to tne throat 26' Dlam. 3t W' D~am. cas~rng.Most sizes of this type gate above the 12x12" size NOTE: Other s~rcearc avmlable. may be furnished with either a circular cross section for conical shaped bottom bins or a square cross section for flat bottom bins. When provided with a circular cross section, the collar is cast at a 45 degree angle as standard. The Iarg- sizes of this type gate are furn~shedwith steel gate plates. Distance between mounting collar and pivot point of gate plates may be varied to meet specific requirements. Type "D" Undercut Gate has ~tschute attached to a vertical surface (the front or Use Denver Equipment-Standard the side of bin). This type gate ooens with a downward ro- World Over. "No Yearly Models But tary motion and is closed by Constant Improvement." a downward pull on the dc- tuating arm. This causes the Complete Milling Equipment From A pate to cut under the stream TyIe "D" Denver Undercvl Ern Glte &om below so that lumps Testing . . . To Feeder. . . To Dryer. cannot interfere with closing. The 30"x24" size gate plate is of steel with cast iron gate sides and, in addition to the 24" by 24" size. can be made any width from a 24" minimum to a 42" maximum. (Continued on next page) GRIZZLY, Denver Shaking GRIZZLY BARS, Denver

DENVER Shaking Grizzly has been developed as a distinc GRIZZLY Bars are a widely improvement over the fixed grizzly now in such wide use used means of reducing the It combines the functions of screening and feeding the or6 work of primary or secondary to the primary crusher, and, by eliminating the undersin crushers. As the ore is fed to product in the ore feed to the crusher, materially increase: the crusher, it passes over the the crusher capacity. grizzly bars, and the finer In addition, due to the pulsating action of the unit, th~ pieces drop through into the ore is fed positively to the crusher, at a controlled rate ant mill ore bin. The grizzly is the manual labor usually required is eliminated. made of wear resisting wedge The unit consists of a strong, frame mounted, standarc shaped bars easily replaced if grizzly which receives a positive eccentric motion in a lab necessary. era1 r'nw "lrruqh connectinq links attached to the heat Denver Grizzly Bars are motion of the jaw crusher. Due to this positive action th~ punched and held in place by angle of slope of the grizzly may he much less than tha. steel rods passing through the required in fixed type grizzlies; and head room or fall ma! holes. Cast iron spacers, of the be reduced. proper shape and width are The Denver Shaking Grizzly is constructed in sev. placed between the bars. $ari- era1 sizes to fit standard Denver Jaw Crushers. ous types of bars and spacers can he supplied, depending Shaking Grizzly upon the application. sire Dimensions Inches Denver Shaking Grizzlies can be Inches Bar Spacings (Weight Lbs. per Sq. Ft.) supplied on three standard WL Member Sections ------sires of Denver (Fo~ced %" M" 1" I>r''lh" l?L" 2" 2%" 3. Feed Type) Jaw Cruzhers. 5,. , 60 12" x 36" ------8" x 10" 18'' x 48" Bar .Ffi"xl%. 30 26 22 1 7 14 13 Rod Dism.: %". 1 1 1 1 1 1 9" x 16" 24" x 60" -- 1 ------. -- Bar: h"xW"x1 K". 31 27 23 20 18 17 16 15 14 Rod Dism.: %". ------Ber: ?/sXx34"x2" 40 36 29 27 24 22 18 16 14 Rod Diam.: !a". ------Bar: y2"r?i"x3" 63 55 49 43 40 . . 36 Rod Diam.: %". A Denver Mineral Jig or Denver "Sub-A" Unit Flotation Cell In Your Grinding Circuit Will Recover Mineral As Soon As Free. Denver Equipment Company publishes DECO TREFOIL. an exchange of helpful engineering information designed to improve milling. DECO TREFOIL is published every other month. If you are connected with mining and do not receive DECO TREFOIL please write to us. HOIST, Beebe Hand GASOLINE OR ELECTRIC MOTOR DRIVEN I- I- Motor H P 'Rope Drum Hotst THIS unit easily handles a Rope and Cnparlty D~menrionsDimensions Appror. multitude of hoisting prob- Pull Rope Speed ------Shlp. lems. It is easily portable and Lbr. Ft. Per Mln. - Drum Wexght I Size Cap. Pounds the large gear reduction H.P. R.S Inches Feet Dia. OFace makes minimum effort re- -pp-pp quired to lift large loads. An 2000 10 140 'A'' 900' 14" 1.5" 6'4" 3.8'' 2100 ideal unit for trucks, hand I5 210 derricks, gin poles, jib cranes 20 280 and similar applications. Pow- 3000 ;:; %" 1400' 21" 24" 2.8" 4'9" moo er may be applied to any size !! babe n.nd nomt unit when desired 4000 210 %" 1800' 24'' 24" 8'4" 4'9" 4100 280 DRUM CAPACITY Drum Sire 350 Hoist Site Pet of flexible steel cable Inchn 5000 40 225 %" 2000' 28" 27'' 9 2" 5'1" 6400 . ~p- 50 280 I-- - - 335 %" ~>;Yl~%;~!-A" "." %" mans based on 6 layers of rope

5 Ton Spec ELECTRIC~ ~ MOTOR DRIVEN 5 Ton Spec 15 Ton S~ec I750 R.P.M. 1150 R.P M 1750 R P.M. No, 11'/, - 3HP I - 3HP / - 5H.P. / Rope Rope Rope Drum Capacity Fnt of %" Rope HOIST, Denver Mine Rope Rope sped 1 Rope Sped Rope SP~ Layer Pull Ft. Per Pull Pt. Per Pull Ft. Per Lbs. Lba. Min. Lbs Min ONE of the main problema in - - --. -- 1st 1100 1700 60 1800 90 the operation of a mine is the 4th 850 1300 75 1400 120 hoisting of ores speedily and 8 th 650 I SO loso 100 1100 150 12th 530 800 125 900 190 without excessive labor costs. I I Denver Mine Hoists are of NOTE: Dimensions of No. I 1 % sir-38" Length by 29" Width. rugged construction and time proven design and success- GASOLINE ENGINE DRIVEN HOIST fully solve this problem. They keep tonnage moving, without No. I % 1 2200 R.P.Y. 2800 R.P.M. Drum shutdowns or delays which re- --. -.. .- Capmty Fee: duces overall operating ex- Rope Rope Rope Spccd Rope Rope Spccd of %" Rope pense. Frames are sectional- Layer Pull Lbs Ft. Per Min Pull Lbs. Ft Per Min ized and of heavy steel con- I 2100 40 2000 struction. Drums and gears 4th 1500 54 1400 8th 1200 70 1175 85 800 Denver smrlo Drum uin. HDISI are of Meehanite and pinions of foreed steel. Heavy duty NOTE: Dimensions of No 11% slrt3.5" Length by 29" Width. ball bearings, removable and adlustable, are used on the Data on larger hmitr are available. sizes shown. Post brakes are constructed of heavy cast steel and designed with a large safety factor. Larger slzes of hoists than those listed can be furnished, as well as hoists with different specifications such as drum friction clutches, band brakes, or double drum. Add~tionaldata gladly furnished upon request.

(Continued on next page)

May We Please Work With You On All Your Equipment Needs? HOIST, Utility and Tugger DOUBLE DRUM "TUGGER" ELECTRIC HOIST r P THE hoists illustrated are two Length of a large variety available for u n d e r g r o u n d duties. The *Overall single drum air hoist is ex- Length tremely useful for such pur- Ft. Per lnchc~ poses as operating a skip in a winze or for pulling cars on an incline. This hoist can be equipped with column mounting and chn be readily installed for the service required. It operates under Ihs. AX Motor Driven Slnll~ 30 Drum "ULilitl" nobat per square inch air pressure. THE double drum electrrc hoist is most suitable, where power is available, for use in c onn e c t i o n with scraper mucking and loading, or I 8, I 1, "slushing" bperations. It is *With intermittent rated A.C. Motor. also furnished in single and tri~ledrum tnxs and can be DOU~I~ run ~~eetricnoia driven with - electric motor, air motor, gasoline engine or oil engine drive. Capacities range from 754 Ihs. to 10,000 Ihs. with ,-ope speeds varying from 75 feet to 450 feet per minute on various sizes available. SINGLE-DRUM "UTILITY" AIR HOISTS Denver Ore Tests are made: on an "actual cost" basis. This brings the *Rated Average Ft. Maximum Amount ol world's finest laboratory equipment Size at Rated Load and skilled technicians to your service Pressure at a very low cost.

Net Slre Pipe Hose Recom- Wt . connec- Lbs tion mended Inchel Inchen - - -- 850 1 !4 We have often been referred to as the 940 1% "Diagnosticians of the ore dressing I I I Capxlty can be increased many tlrnes by the use of aheave or block industry." Perhaps we can help you and tackle. with your mineral recovery problems. Please let us try.

Your comments and suggestions are always welcome. Please write to us. INDICATOR, pH, Denver INDICATOR, pH, Denver Alkacid

I 1 THE control of pH 15 lecog 7 nized as an important factor DENVER Alkacid Indicator in successful and profitable provides a quick, simple flotation milling treatment. method of measuring pH of Colorimetric pH control is liquids within a range of pH widely used because of its 2 to pH 10 with an accuracy simplicity which allows its use of 51 pH. The indicator con- wlthout technical training. The sists of a spool of inch test only requirement is that the paper enclosed in a transpar- operator be able to match col- ent plastic cover 2% inches in ors, making it possible for the diameter. Mounted on the - average worker to obtain ac- cover is a color chart showmg I the five distinct color changes curate results. NO 605-H Denver DH Indlcalar that the paper undergoes at the variou pH ranges. The The No. 605-H pH Indicator Showing Color Wheel unit is supplied, filled with one 15 ft. roll of test paper. is enclosed in a durable, cor- rosion-resistant housing. Compartments for all parts; color INDICATOR, pH, Denver Electric disc, two square tubes, a plpette, and a bottle of indicator reagent, are provided. Glass color plates are standard and THE Electrlc (Hydrogen Ion) are non-fading. 6 pH Indicator with glas elec- The Block-L, Utility-L, and trodes, ~rovidcsa quick and !;>( / Roulette-L pH Indicators are accurate method of determin- 1 *% / -,mole comoact unlts for a ing and controlling acidity or alkalinity. Accurate pH deter- mination can be made with ease on practically all sub- ' or nigh; &ration. stances. - regardless of color, suswnded solids. colloids. oxi- Block-L Denver rH lndirator For as to , . Or equipment for a specific prob- Model R Electric pH Indlcalor dizing reduc'ng agents' lem, give range of pH values to be determined and nature The pH readings by these and characteristics of material. Let us.recommend the unit units are positive and extremely accurate due to their best suited to your particular problem. being true readings of the hydrogen ion content of the solutions being tested. Readings are more accurate than by color comparison. Units are equipped with reference electrodes of the saturated potassium chloride-calomel type, and rugged factory sealed glass electrodes. The accuracy of these indicators is unaffected by vibration or electro-static ___ p- --- - 0 2-13 6 0 20pH Daylrght 8" 2" 5%. di&urbances and a built-in temperature compensator auto- g%kcL 0 2-13 6 0 10pH / 1- Mazda / 26" 26" 16" matically adjusts for a wide range of temperature variations. UtAtv-L I 0 2-13 6 0 25pH Inc. Marda 13" 13" 8" Indicators consist of the electrode system and a compact case which houses the registering devices and instruments.

Definite recommendations can /ij be made as to the equipment ( required for your specific problem of circuit alkalinity control. Not only is it possible to make pH measurements on laboratory samples, but models Recover Your Mineral As Soon And As 7 are also ava~lablefor continu- OUS Madel G Eleatrm pH Indicator pH measurement and re- Coarse As Possible. cording.

119 ' pH 1 A ppror. Modell Use Rangc i Accuracy Sh~ppms Ship. Wu.. I Size No. of Cam 9". Capac. Screen Motor Lbs. Wood partmats n Tons per Area H.P. or Steel 24 Hours n Sq. Ft. Motor Drivrn )0mestic Export

10 80 120 160 ZOO JIG, Denver (Improved Harz Type) 240 60 W. - .~~.- I Denver (Imoroved~ ~~ Harz .-lrl ~~ .~ - 2 120 Type) Jig is essentially a 24"x36" 180 210 coarse - mineral concentrator 5 300 ., embodying improvements on 6 360 the Harz Jie and the Ellis Jie. f: 1 75 It will handle successfully all 2 150 k4 1 types of orLs whici~ can 30"r36" 225 t1,eated bv eravitv concentra- 300 I 11 .- . 5 375 I (Imprlrrd Tyla) tion with feed size ranging 6 150 from Y4" to 152". These jigs are made in three sizes and with on? to six *Averace capacity ir aned on 10 tons of ore per square foot of screen compartments sub-divided by a shallow partition into a surface per 24 hour screen compartment and a plunger compartment. Hecipro- cation of the plunger causes flow of water through the J IC, Denver (Selective) Mineral screen. The coarse and heaviest particles settle onto the screen and are removed by a side drawoff. The heavy fine particles pass through openings in screen into hopper-shaped hutch, from which they are discharged intermittently or continuously. The light particles pass into next compartment where currents are of lower velncitv. Standard construction is welded steel tanks and frames with laminated wood plungers. Iron work consists of necessary tie rods, eccentrics, plunger rods, screens, concentrate drawoffs, shafting and bearings. Jigs may have belt or motor drive. Wood construction is available if desired. Additional data gladly furnished upon request.

*Dimensions of 1 and 2 Compartment Units 9i.. 1 Inches Steel Construction Wood Construction concentrated in this jig. 3.,yz., ye.. e,,.. The Denver Mineral Jig is usually installed in the grind- j 6'9" 3'3%'' 6'2" 6,41~- 5,6,, a,,,, ing circuit between the ball mill and classifier, or at any other point in the circuit where free mineral is present. It is ideal for use in cyanide, flotation, and gravity-concentration mills; base-metal and non-metallic mills; tungsten- gold mills; and placer operation; to save minerals as coarse and as soon as possible, thus reducing grinding cost. *Dimenrmnr for 1 to 6 compartment units will be gladly furnished on renuept. (Continued on next page) NOTE: Water requtrements vary from approximately 3 to LO tons per ton ore treated Stroke variatton is from 0"-1" on the 18"rW' sire to 0"-1%'' on the 21"r36" and 30"x36" sizes. (Continued from preceding page) obtained. This size jig is most desirable for trial installa- This jig is simple to regulate and control, requiring only tion in large tonnage mills to determine the desirability of periodic discharging of concentrates from the hutch, which a jig in the circuit, as it can operate on small quantities of can be locked to prevent theft of high-grade mineral, or material of the same size as that handled bv the lareer can be arranged for continuous discharge by using a Denver- size jigs. Dowsett Density Control Valve. The Denver Mineral Jig The 4"x6 jig has a single hutch compartment and a requires a minimum of attendance; dilution is easily con- reversible screen compartment cunstructed of cast iron so trolled, as it IS always necessary to add water to the jig that cyanide solution? can be fed to the unit instead of tailing for subsequent classification. It requires minimum water if desired. The rotating water valve is timed to admit floor space-be~ng less than that for any other concentration water only on the plunger up-stroke and is located on the unit; and has a low initral cost. No pumps or elevators are end of the eccentric shaft. The.eccentric shaft is mounted needed in the ball-clas~iier circuit. as the iie acts as a in a ball-bearing double-pillow-block type bearing. An . .> lau~der.It treats an unscreened, unclassified feed-yielding adjustable eccentric is used for varying the movement of the a clean, high-grade concentrate. The distinctive upper trash rubber diaphragm. The upper trash screen consists of a screen preients foreign tramp matter from interfchg with four mesh woven-wire cloth. Two lower wedge-bar screen? normal jig operation, and the lower wedge-bar screen mini- are furnished with each jig; one with 2-millimeter openings mizes the blinding so common in other jigs. and the other with 5-millimeter openings. The rugged design of the jig with its few wearing parts When the jig is used on continuous tests, a steel stand is insures continuous "24 Hour Service." recommended for mounting the jig. The steel stand is Additional data gladly furnished upon request. arranged with a shelf for holding a glass jar which accumu- lates the jig concentrate as it discharges from the hutch and which facilitates the inspection of the type of jig product while the test is being conducted.

Machine I Capacity Steel Dimcnsions iwotor wt.Shipping ~b~. Size Pound. Stend - H.P. -- -- Per Hr. - -- -Belt __ Motor 4"=6" 150-500 with t: ;$: ;;: 4"r6" 1 150-200 Without 18'' 1 23" 1 24" 1YxlE"~i~plcx25-75 26.. 42" 66" % 1165 LO15 1130 1 1 1 200 1YxlE"Duplcx 50-150 48" 42' 66" 1 1650 1375 I800 16"x24" Simpler 75.200 3Y I 66" 1 1500 1225 1450 l6"x24"Duplex 150-400 60" 5' 66" 1% ZOO0 1790 2280 2Vx36 Simplex 200-400 4V 69" 67" 2 2900 2500 2750 24"x36" Duplex 400-800 86 69" 67" 2 3975 3575 3910 J6"x4E"Simolcx 405-800 53':'' 74%'' 73%" 3 3900 3400 3800

'Capacity should be decreased 50% when $%%ing"on-mctallics. **HP of garalcne engine is 134 up to and includin~16x24" Simplcx. 2 H.P. for 16"xZV Duplex and 3 H.P. lor 24"r36" Simplcx and Duplex. tHclght wthout motor 1 IC, Denver (Selective, Mineral 4"x6 1 DENVER Mineral Jie. size 4

~- -~ -r- ~WXW' s,mp~rx en^ (so~.~tirs) cuit work in the laboratory LA 1 16' DENVER DlllillX ACID RESISIIWO NINERRL 1IC Mlneral llll (Lor Dilution) especially where a large quantity of con~ntratemust be 122 MAGNET, (Suspended Type MAGNETIC PULLEY SOME type of magnetic unit is THE high intensity Magnetic always advisable and should Pulley is one of the most sat- be a standard piece of equip- isfactory and economical mag- ment in every mill. When one nets in use today. It is a sure (Suspended Type) Magnet is way of getting a practically located just ahead of the pri- iron-free product. The low mary jaw crusher, and an- cost of current consumption, other is placed before the in- positive operation, low main- termediate crusher, all danger tenance, and moderate initial of damage to the crushers cost, all have a definite place from tramp iron is eliminated. in planning or improving The tramp iron usually con- everv efficient milline.-, mo-. sists of stray bits from drills, Intcn.,ty Pull.y cessing, or industrial plant. (Suwnded Type) Magnet Remwlng hammerheads, and other took Shoving ~ethod or Seoaratins The greatest asset of the Foreign Masnatic Matsrlal which can seriously damage Forelnn Magnetic Matertalr from Magnetic pulley is the ability Feed to Crulhlng Rolls crushing equipment. of this compact, efficient unit The suspended type of magnet has its place where space. to attract and hold the tramp is not the deciding factor. The suspension of the magnet material to the surface of the drum until it is away irom above the ore conveyor preceding the jaw crusher allows it the material being conveyed. The weight of the iron brings to be swung aside when replacing conveyor belt or working it to the bottom of the conveyed material and it 1s thus in an on the conveyor pulley; and also for periodical removal of ideal position to be attracted to the Magnetic Pulley mole adhering tramp iron to maintain maximum efficiency. The quickly. The tramp material is then disposed of when the suspension principle makes this a low cost unit. revolving drum or cylinder reaches the "demagnetized field Care should be used in Lhe selection of this type of mag- or dead spot" on the under side of the drum and the iron is net as the width of the conveyor belt, the proper depth of allowed to drop into a bin provided for this purpose. the ore being conveyed, and the average percentage of No one type of Magnetic Pulley will be adaptable to every foreign material to be eliminated, determine the size of need, although there is a Magnetic Pulley for every specific magnet used. The magnets are made in circular or rec- application. The design used for collecting tramp iron is tangular types and may be suspended on either a trolley or entirely different from that used for purification or con- crane, or on the stationary suspension principle. centration purposes. The construction of the Magnetic Pulley flux Let us make recommendations for the correct size and type is such as to allow the maximum densitv to be- oh-~ of this low cost maenet best suited to your needs. tained. Each section is a separate magnet (ha;ing a separate casting) with its own coil, core and north and south MAGNET. Denver Alnico Horseshoe poles. The Magnetic Pulley is cool operating which prolongs THE Denver Alnico Horseshoe Magnet is a small, ex- thc. life of the pulley and is necessary in order that the unit tremely powerful, hand magnet. It is an alloy of alumi- maintain its most efficient operation. num, nickel, and cobalt, very high in retentivity, and many The Magnetic Pulley is used as a head pulley of a con- times stronger than the ordinarv horseshoe maenet. It is veyor and very often the shaft of the Magnetic Pulley can be extremelv resistant to demag- made to correspond with the shaft of the original pulley. It is necessary then only to place the Magnetic Pulley shaft into the existing bearings. The collector ring housing is attached to any suitable bracket. The contact rings are in place on the shaft. The switch cabinet is completely wired, and the connection between it and the contact brushes is accomplished quickly. Magnetic Pulleys operate on direct current only. They are wound for either 110 or 220 volts, although higher voltage can be used when specified. Alternating current is not suitable, and when direct current is not available, a generator, osnrer AMO ~~~~~.h~mnat small and light enough to motor-generator set, or a rectifier is installed to convert carry about in your pocket. the alternating current to direct current. However, these generator sets are of small size because of the nominal cur- Dimensions A~~~~xlmate rent requirements of the pulley. Shivvlnr Sire Heiaht Width Th~ckness Weiaht Pounds A large range of sizes, both in diameter and width is available and there is a capacity to suit every individual Small 1 A" 1 %" %" % requirement. Pulley width required is determined by the L~~~~ 2%'' 1%" 74'' % width of the conveyor belt used and the diameter of a Mag- netic Pulley determines its strength; the larger the diameter the greater the strength. Data necessary for recommendations is kind of material to be treated, size of material, amount to be handled per hour, whether wet or dry, purpose of separation, and characteristics of available current supply.

Approx. W Shippmg Length Wclght 1nrhca I Current Pounds

*The Magnetlc Pulley may also be obtained in diameter sizes bf 24" 30". and 48" with a belt width varying from 18" up to and including 60" in wcdth. We suggest that our engineers be consulted with regard to the larger sizes

MAGNETIC SEPARATOR, Dings-Crockett (Wet Type)

THE Dings-Crockett High Intensity (Wet Type) Submerged Belt Magnetic Separator is designed ior wet separations. It has found wide application in the concentration of magnetite, ilmenite, and other materials of similar magnetic suscepti- bility where it gives an amazingly clean-cut separation of tailings, middlings, and concentrates Its maenetic efficiency is well above 99%. The separator will efficiently handle large capacities oi unsized ore from minus 1:4" down to the finest dust. Con- trol of the separator 1s simple, steady, and not crit~cal Feed rates may be varied over a wide range and practically the same results obtainGd. DlnwCrocketi High lntenritr (Wet The unit consists a sta- T~mlMagnmc Scparilor tionary curved bank oi twenty magnets, partly submerged in water, under which pas:es a thin conveyor belt. Magnet pole pieces are therefore kept in close contact with belt.

I I 1 I I I D~~~~~~~~~ M~~~~~ Belt / *CPPPCI~YWater Watts Motor Width Width Ore Rcq'd - - D C. H P. Per Hour C P.M L - - - - 12" IS' 4 to I8 15 to 45 166.. 53" 104" 1200 2 & 3 4' 30" 9 to 38 30 to 75 166.. 65" 104" 2400 3 3' 42" I4 to 55 45 td 110 166.. 77" 104" 3600 5 8' 54" 20 to 80 60 to 150 166" 89 104'' 4800 5 & 7% (Continued on next page) I I I 1 I1 'Capaclty figures valy greatly wlth rlre of materral bang handled and Concentration rauo. MAGNETIC SEPARATOR (Continued tram previous pace) MAGNETIC SEPARATOR, Dings Rowand- Wetherill (Cross Belt Type) 1 Approximate Machine Total Motor Approx. Sire Dimensions Shipping Watts I -~ H.P. No. Wt., Lbs. THE Dings Rowand-Wetherill L W H Magnetic Separator handles E No. 1X many materials which cannot E No. IE be handled satisfactorily by E No, tF any other type of magnetic E No. 1G E No. 2E separator. Even the finest ma- E No. 2F terial can be readily separated E No. 2G with highest efficiency. E No. 3A The material to be treated E No. IA E No 1B oingr owa and-wethcri~~ icrors Belt (which must be absolutely E No. IC TIOII Mawelle scmator dry) flows frnnl the hopper E No. 2A onto the feed roller which E No. 2B E No. 2C spreads it in a thin, uniform layer over the whole width of E No. 3C the conveyor belt as it travels toward the poles of the E No. 4C magnet system. As the material passes between the poles of the first magnet the magnetic particles are strongly attracted toward the upper pole and jump toward it. They are intercepted by the cross belt which removes them MAGNETIC SEPARATOR, Stearns (Ring Type) quickly from the influence of the magnets and allows them - - -~ ~ to drop into a receptac!e provided at one side. The use of a rc.:= <..,, THE S t e a r n s (Ring Type) series of magnets of different strengths permits the separation - Magnet~cSeparator dflers ma- from one another of materials having different magnclic terially from the cros belt permeabilities, as well as the separation of magnetic mate- tvw- - nlachlne A steel take- rials. The separate removal of the strongest as well as the off ring is employed in place weakest magnetic mineral is possible. of a cross belt to intercept The capzclty of any magnetic separator depends on :so and carry the magnetic ma- many variab!es that it is impossible to estimate the exact tonnqge until a test has been made and all necessary &:a terial beyond the conveyor received. Let us engineer your proposed installation. belt to final delivery. It has been found in certain applica- -- - ".. -- tions that the steel take-off Ampere Turns Per Magnet -- -- .-- ring actually improves the sep- Ooeratian or Steam (Ring TrPc) Fmr Second Thmd Foulth Magnetic Smnrator aration, The ring has a broad Marnet Mannet Maenet Maener flat surface adjacent to the magnetic pole to receive and carry the flux built up by the magnet. The sides are shaped to form a ~araboliccurve endine in a defined wak where the concentiated field is produced. The magnetic material is attracted from the feed belt to the inductively magnetized moving ring, which forms a part of the magnet pole, while in the field. In moving away from the field the ring carries the magnetic particles beyond the conveyor belt, effecting an automatic discLarge as it approaches the zero point between the plus and minus poles. The magnetic gap on this unit can be opened or closed within fixed limits by a simple and very convenient adjustment. Adjustments are usually made while the machine is operating. Thii applies not only to the magnetic air gap, but also to the flux densitv of the magnetic field. as the Dower (Continued on next page) or attractive force of ;he magnet is replated hy a rheostat which controls the amount of current used. Such adjustments will accommodate a wide range of sizings and variable magnetic permeability of materials. (Continued from preceding page) MATTING. Denver Rubber and Corduroy Capacities of magnetic separator unlts vary widely as their most efficient operation depends upon a large number of fac- DENVER Rubber Mattmg, as tors. It is therefore impossible to estimate the exact ton- shown In lllustratlon at left, nage that can be handled without complete data and pre- f 1s used In ~lacerand mlll OD- liminary tests. Let us engineer your mstallation. erations, replacing blankets for recovering coarse and fine gold. Ampere Turns Per Magnet The innumerable small re- 1 - --.- Sire cesses catch and retain the 7: s... Th... .our. values, particularly in the fine Magnet. Magnet". Magnet Magnet sizes. Denver Rubber Matting D No. 0 I 2 is very easily washed, a fact which simplifies its clean-up. It is so tough that its life is many times that of ordinary blankets. Full rolls are. 24 inches wide bv 50 feet lone: weight of full Galls is only 1;0 lbs., for ease in handling, but any length is available. This Denver Rubber Matting can be furnished on a continuous belt concentrator similar to a vanner, with water sprays for the removal of the concentrates. This unit is built two feet wide and can be furnished in any length required to meet specifications for a particular operation. - DENVER Corduroy Matting is made up of strongly ribbed fabric material. It is widely used by the mining industry for gold recovery in sluices, launders, and on tables. Both a wide Sire watts No. L W rlb, best suited for placer under-currents and a narrow rib, -- - designed for ground ore treatment, can' be obtained in a D No. 0 width of 36 and in any lengths desired. The weight is ap- D No LB proximately one pound per yard of length. D No. IAB D No. 2B D No. 2D D No. ZAB D No 2AD Denver Ore Tests are made on an D No 2BD D No ZABC "actual cost" basis. This brings the D No D No. world's finest laboratory equipment D No. 3D D No and skilled technicians to your service D No D No. at a very low cost. D No. Your comments and suggestions are always welcome. Please write to us. A Denver Mineral Jig or Denver "Sub-A Unit Flotation Cell In Your We have often been referred to as the Grinding Circuit Will Recover Mineral "Diagnosticians of the ore dressing As Soon As Free. industry." Perhaps we can help you with your mineral recovery problems. Complete Milling Equipment From Please let us try. Testing . . . To Feeder . . . To Dryer. MERCURY, Denver MILLS, Denver Cyanide

MERCURY for use w~thamal- DENVER Cyanide Mills are gam-. plates and barrels, ball designed to treat a particular mills, clean-up pans, etc., can ore deposit to give the highest be furnished at the prevailing economic return; due consid- market price. Specially de- eration being given to loca- 1 siened metal containers can be tion, tonnage involved, and supplied in a number of con- capital available. Each ore venient sizes. These metal con- body to be treated presents talneis avo~dspillage and an individual problem due to breakage and can be easily these variable factors. transportcd. Large flasks con- Various combinations ol tain 75 pounds and smaller Denrsr Cmnida Mmll Installation treatment methods are utiL sizes, 5. iO, or 25 ~oundsof ized to best advantage. FI&.~ ~c,~rerMercury Flasks mercury. tion, and amalgamatioil provide valuable auxiliary treatment. Frequently flotation is used to provide a snrall high- grade concentrate that is cyanided in a compact concentrate treatment plant. MILLS, Denver Amalgamation and Concentration Denvcr Equipment Company is well known for its ability FREE milling gold and silver ores arc efficiently and eco- to furnish the right machine for the lob, irrrspective of the nomically treated in Denvcr Amalgamation Mills. Thcse flowsheet. Our testing laboratory will be glad to cooperate mills arc often used in the early stages of development of with you either on your present mill problems or on your proposed new mill. free milling gold properties to recover thr main portion of ' the gold with a simple, ineipensive flowsheet. Later a more More conlplcte information can be obtained by wr~tuig cnm~rehensiveinstallation can recover the remaining min- any Denvcr Equipment Conipany office.

having erratic mineral occur- rences and exploit properties MILLS, Denver Engineering Service with limited orr reserves at greatest possible profit and DENVER Equipment Com- with a minimum of risk. pany's complete engineering The basic machine in Den- service begins with ar accu- ver Amalgamation and Con- rate and comprehensive ore centration Mills is the Den- test, a report oi which is sent to you with estimate oi profits ver~ Spkctive~ Mineral Jie... , used in conjunction with the you may expect from treat- Denver Amalgamation Unit. ment of the ore. Aftcr proper The balance of the equipment m~thod~- ~~~ of-- handling~~~~~~~--,~ vour ore~- includes a jaw crusher, ball Surccrsiull~Omratins Larse Tunrstrn has hendetermined, our en- Mlll Englnccred and Built by Denver gineers design a mill adapted mill, rotary classifier, and cor- Equimonl C~mwny duroy blankets or a concentrating table. Mills can bc oper- to your problem, giving com- ated by diesel-electric generator sets using individually plete detailed plans and gc,n- driven units, giving greatest possible flcxihihty, or trans- era1 arrangement to mable construction of the mill econom- mission equipment can be supplied for driving from a s~ngle ically and in the shortest possible time. We also can furnish a source of power. competent construction superintendent and a crew skilled More complete information can be obtained by writing in mill building. Their familiarity with our equipment and any Denver Equipment Company office. methods insures speed in installation and lowest costs. Many factors enter into the arrangemenk for designing and building a mill; and close, coope1,ative effort is essential to obtain the maximum value at lowest cost. In addition to Mill design and Flowsheet design are information obtained by complete orc tests, certain other also services of Denver Equipment Co. basic facts must be knbwn before we can carry out an orderly procedure or plan of design and construction. Write for details how these services More complete information can be obtained by wr~ting might help you. any Denver Equipment Company office. MILLS, Denver Flotation gravity concentration can be supplied without the expense of engineering design. When a larger tonnage plant is war- ranted, the equipment of these smaller mills can be used in the flowsheet. Only machines which have proved successful In plant operation have been included in these mills. They are built in sizes ranging from 5 to 100 tons per day and can be supplied without steel framework if desired. - - More complete information can be obtained by writing any Denver Equipment Company office. A" Flotdion Maehinef ies and lowest costs. A FEW EXAMPLES OF DENVER The machines used in the general arrangement of these flotation mills lnclude a jaw crusher, ore feeder, ball mill with spiral screen, classifier, unit flotation cell, conditioner, flotation machine, wet and dry reagent feeders, concentrating table, sand pump, and concentrate filter with vacuum equipment. More complete information can be obtained by writing any Denver Equipment Company office.

MILLS. Denver Portable A Denver Portable Mill is a complete plant, including motor or belt driven units and complete steel framework for mounting the machines. It is inexpensive because it can be assembled quickly at small labor cost; the mill having been completely erected and the parts labeled before shipment. Standardized design and St4 WOrCb-nwr Portable Mill mass production of these milling plants make them very economical . . . this is particularly true of plants up to 50 tons per day capacity. Many Denver Portable Mills are being used as pilot plants as they can be quickly erected and if the ore body does not warrant a large tonnage plant the mill can be easily disman- Denver Portable Mill ir completely orsembled prior to shipment from tled and moved to another lo- factory. Pieces are match-marked to simplily erection of mill at destina- Denver Portabk MiiI-Motor Orirs cation. Standard flowsheets for tion. This mill wor supplied, complete with structural ~teelmembers, flotation. amalgamation and flooring, roofing, electrical wiring; piping, motors, drives and equipment. One source of supply eliminated endless delays at destinolion. (Contmued on next page)

134 Grinding circuit of Denver Portable Mill. Denver Unit Flotation Cell ond Denver Mineral Jig are in closed circuit with Denver Ball Mill and Small Denver Portable Flotation and Gravity Mill. Mills similar to Denver Classifier. This compact unit is mounted on steel frame work, these Denver Portable Mills can be supplied with or without structural can be dir-assembled and shipped ta other locations thus giving greater steel framework. value to equipment investment.

Small Denver Portable Mill is assembled and tested at factory. Power Portable Denver Labaralary and Continuaus Pilot Test Plant. This plant is at left, ore bin, crusher and ball mill are at right. Compact unit completely equipped laboratory war installed in trailer-type building. is ideal far explaratian or for working limited deposits. Portable mills and laboratories can be designed ta your specificatianr. MILLS, Denver Portable Truck What can we do to help you? THE Denver Portable Truck Mill has a capacity of approximately five to nine tons per day, and cons1st.s of the following Denver Machinrs: plunger ore MINERALIGHT feeder, jaw crusher, belt conveyor, ball mill, spiral screen. I MINERALIGHT was d e v e 1- selective mineral jig, amalga- oped to fill the need for a matron cleari-up pan with simple method of identifying rlffled launder. flotation cells, lhosc substances which re- pdot table. and middling re- spond or "fluoresce" when torn pu~iip. A die5el-electric subjected to ultraviolet light. generator unit for individu- In the field of mineralogy, some 290 nunerals are known ally driven machines or neces- to have this property of fluo- sary transmission equipment resence. Early day pros- and engine for lineshaft drive pectors, while searching for is also provided. gold, discarded valuable niin- The Dcnver Portable Truck erals, such as scheelite; being Mill is ideal for concentrating unable to recognize them by gold and many other ores. Any ordinary field methods. The part of the flowsheet can be moderrr prospeclor does not used or omitted, according to pass by these opportunities, the treatment desired, due to since he uses the easily port- the ninchines bemg arranged able, compacl hlirreraliglit. on the truck to give maximum Besides the application in flexibility. The use of only mining, this lamp is also used standard equipment in the extensively in ore dres~ingand flr~wsheetallow? the operator mincralog~callaborator~cs: ore to try a number of different sorting; the "fluorochcmistryn inethods to obiain the best field; investigating various pe- resulL?. These units can be Model V-42 M~ncrallghf Lamu trolcum, organic. and inorganic addcd to if increa:icd tonnage chemical products; b~olo&al is desired. materiak; the dye industry; and in criminological work. The entire unit is sell-con- The M~neralightis available in nineteen different niodeli. tained with all ~nachines as- (Continued on next page) sembled on a heavy steel frame. Due to being mounted on a tra~ler or semi-trailer Recover Your Mineral As Soon As Free. truck, as illustrated at the left, this purtable mill can be moved quickly from one loca- Recover Your Mineral As Soon And As tion to another. The mill can ;ilso be removed from the Coarse As Possible. Drnvrr Porfablo Truck Mlll Mollntrd tr;iiler or truck and mounted on Sm-Tra~lwTruck Shawns Gan- on a fixed foundation. Denver Equipment Company publishes ma1 Arrangement of Unlts-Varlou9 Arrangements are used According to Additional data gladly fur- DECO TREFOIL. an exchange of help- Trealmcnt Mtlhods LO be llleor~orated nished upon request. ful engineering information designed to improve milling. DECO TREFOIL is or im- published every other month. If you are Use Denver Ore Tests to verify connected with mining and do not re- prove your present flowsheet. ceive DECO TREFOIL please write to us. MOTORS, Fractional H.P. and General Purpose IN ttlc modt>rn dcctric motor ~nstallarion the individual nn,tor dr~vc ha5 pract~cally replaced ell orher types. It id comparnt~r~dyt.&sy to obtain tht. rquired speed through tht. uzt. of motors d~rtmlycon- modal m.13 Minaralwhl L,VM and operating instructions. Aux- nw1t.d to thc drivtm ~t~:~ct~~nc. Com~act-Ideal for closa Exarnmstm iliary equipment such as wil- 01 Known OaOalltr and Prorrecllnl through sptvd rcduct.rs, or tt~,, lemite screens for mercury de- now niort. tvwnomicnl gc;ntd tection, standardized scheelite ni~ltors.or t.vt.n through analyzer card, carrying case, battery, etc., is also available. V-bclt or cha~nor sprwkvt Please consult us for further information and recommen- hvt. Tht, use of dr~vt.riof tlu dations. Iylw had r~dult~dIn grtvt- 89 85 1 *Voltnge Lamp Quartz Radiat~m A. C. / Extmwm Tub: Angstrom Power ~yp.1-- Umto 1 Source the case with the formerly widely used lineshaft drive and its associated inconven~ence. Motors have continued to be reduced in size and overall dimensions, while horsepower output has increased over 2-Bar 2540 ~lo CombinedUnlt 2% the past few years until the individual electric motor drive has practically replaced all flat belt drives in new installa-, ?-Bar 2540 110 52 ' 3 % tions. Its use has proved of great value to mill operators due

~ ~ &Bar 2540 110 48 ' 8 to the flexibilitv of circuit?~ usine- machines that are self- 1 contained unitsd 9-Ft. 2540 , 110 As Ordered 21 The individual motor drive has also found rapid acceptance Tubme -I due to its adaptability to almost every type of drivlng prob- *Other models of units shown available for 6 to 12 volt wet cerl or dlY lem. Electric motors have been developed to withstand the cell battery operation-also transformers supplted so unit may use most severe operating conditions and meet exacting re- ather 110 volt alternating current or battery power. **Indu~tnalunit ideal for are sorting on picking belt. quirements. Let us make recommendations for motor type, size, and drive for most economical and efficient service and best suited to your particular problem. FRACTIONAL HORSEPOWER MOTORS A.C OR D.C.

H.p,/+EdI AC A.C. Direct 1A.C. Spht Phax 1 Capacitor Current / 3 Phase Denver Equipment Company publishes 40°C Load -- DECO TREFOIL. an exchange of help- Rim R.P.M. Framc/Wt. bzlWt.=IF =IT ful engineering information designed to improve milling. DECO TREFOIL is published every other month. If you are connected with mining and do not re- I I I I Ill11 *On 50 cycle frame becomes No. 49 and weight rs 35 Ib,. ceive DECO TREFOIL please write tAU A.C. motor meeds in R.P.M. under full load are for 60 cvcle,. Theae 'motors are not f&us.; on 50 cycle without mod!fication. to us. tTbcae motor* arc dual 60/50 cycle and 50 cycle sperd. become 5/6 of tho.= ahown. Our desire is to make you "Happier, (Continued on next page) Healthier and Wealthier." What can we do to help you? GENERAL PURPOSE MOTORS MOTORS, Synchronous Constant SI i-Two and Three Phase 60 Cycle Squlrrr :age Rotors) SYNCHRONOUS Electrlc - - - Motors are available in many Approx. sizes from 20 horsepower to 7.P.M. Shippins: Framt IPM Full V0ll. Weight several thousand horsepower No. sync. Load Pound. and in speeds from 80 R.P.M. - - to 3600 R.P.M. 203 I200 67 The characteristics are usu- 224 900 92 ally built into them as re- 225 720 105 quired for the specific appli- 203 I800 67 204 I200 74 cation and can he constant, 225 900 105 - synchronous, starting, pull-in. 254 720 141 a"d pull-out torques" - 204 1800 74 Solash-Prod Synchronous Motor 224 1200 92 The applications usually 224 900 92 consist of: power factor cor- 254 720 I41 rection, or irnproving power factor, and for constant-sped 224 1800 92 225 1200 105 as well as low-speed direct drives on heavy equipment such 254 900 I41 as ball mills, large crushers, and similar machines requiring 284 720 192 high horsepower and low R.P.M. 225 1800 105 254 1100 I41 They should he carefully applied to the load when used 284 900 192 as prlme movers as difficult starting may result if not spe- 324 720 256 254 1800 141 cifically designed to start under heavy loads. Let us make 284 1100 192 recommendations for your proposed installation. 324 900 256 326 720 288 284 1800 192 324 1200 256 Two and Three Phase--00 Cycle 326 900 288 364 720 435 H.P. .pprox. 324 1800 R.P.M. Pulley hipping 256 Frame cont. ' Diameter No. 40- C Wt.. 326 1200 288 and Face Lbs. 364 900 Rlre sync. Full Lox - 435 -- I- 863 365 720 450 20 1200 1160 326 1800 20 906 288 20 1299 361 1200 20 1622 435 25 906 365 900 450 25 1165 404 720 575 2 5 1622 364 I800 25 1766 435 30 365 1200 450 1165 575 404 900 30 405 720 640 1299 401 1200 575 640 30 1766 405 900 1850 444 720 765 30 445 600 860 40 1299 405 1200 640 40 1299 444 900 765 40 445 720 860 1622 5041 600 1285 40 444 I200 I850 765 40 445 900 860 1850 1285 5041 710 50 505 600 1235 1622 145 1200 860 1285 50 504I 900 1766 505 720 1235 50 I850 *All open type 40° C. general purpose polyphaw motors may ! operated 50 on 50 ~yclesat listed ~oltage~,although they wlll nut llecm ~il~meet 2105 thc standards established for 60 cvcle. owration,. and the mperature 60 rlse will not exceed SO0 C 1766 tSynchronous speeds on 50 are 5/6 of those at 60 cyc!es. (Continued on next page,

142 143 PAN, Denver Batea Hand'Cold

' THE Denver Batea Hand Gold I Pan, patterned after the Latin America Batea, is so simple to operate that anyone can easily use it to recover gold without prevlous experience.

-. ' The Denver Batea Gold Pan is both a gravel washing and "la Pan concentrating device. It is shallow, disk shaped, and has a turned up rim which catches and holds the gold and black sands, making it very difficult to lose the values while washing. The small depression in the center is useful in finally separating the gold and black sands, and gold concentrates can be easily removed through the hole in the rim. Operating instructions are furnished with each Denver Batea Hand Gold Pan. The diameter of this pan is 19'/2",weight 4 lbs.

PAN, Denver Hand Cold THE Denver Hand Gold Pan 1s used in testing gold deposits and can be furnished In either the all steel Standard Denver Hand Gold Pan or the Copper- Bottomed Denver Hand Gold Pan. The latter 1s made of sl.n6.rd Denwar H.nd Pan steel with a copper bottom and, whenever such use is desirable, forms an excellent amalga- mating unit when properly coated with mercury. These pans are made in a standard diameter of 16" and weigh 2 pounds. However, various diameters can be supplied on special orders.

PAN, Denver Mechanical Concentrating DENVER Mechanical Concen- trating Pan, although primarily developed for the recovery of placer gold, is proving equally successful for treat- ing mine dumps, old mill bil- ings, and values from low grade sluice operations. The Denver Mechanical Concen- trating Pan has also proved valuable as an amalgamator in free milling gold plants. The phenomenal success of this unit is based upon the fact that it duplicates the hand (Continued I next page) panning motion in a smooth Experience has roved that the Denver Mechanical Con- r--ibut ~ositiveoscillation which centrating Pan operates successfully under mast conditions. However, operators have requested a machine with a trom- me1 washing screen for gravels containing clay and sticky material. Trommel screen attachments can be supplied for both simplex and duplex units. An outstanding recommendation for the Denver Mechan- ical Concentrating Pan is that this unit has more than six hundred users all over the world. Many of these installations are repeat orders. More complete information can be obtained by writing any Denver Equipment Company office. the hopper on the upper screen simplex ~cnwr~aehannaal (a punched steel plate) which Capacrty Dimensions H.P.Gas. Apprar. cancentratin.2 pan allows '/4" material to pass Machiic Sire Bank Run through. On the second screen -- yards per Hon]z13-l~~-- -- -En'in' -- %%:. the feed is again sized, until only the fine material and the 1 1 water pass to the concentrating stages below. There are 24 Slmplrr 1 %-2 24 Simpler usually three concentrating pans placed one on top of the 24 Duplex 1 !4-23-4 other. The top pan contains a plate of heavy copper coated 24 Duplex 34 with mercury to amalgamate free gold. From this first pan 24 Simpler Trammel 2-3 the overflow enters the second concentrating pan, which is 24 Ihplcx made of steel, with Denver Rubber Matting in the bottom, Trammrl 46 over which is placed a 1" screen to hold the matting in I \Ill I place. This screen also acts as 'Above 7,200 feet altitude, this higher horsepower cngme should he used. a riffle to whirl the material NOTE: Denver Mechanical Concentrating Pans equipped with electric and settle the gold. matar drives available far use wherever applicable. The third or bottom pan is assembled the same as the sec- PAN, Denver Vanning Plaque ond and is used to ensure complete recovery of the remaining values or any floured THE Denver Vanning Plaque mercury. All pans are cun- Pan was originally designed siructcd so that either the by Professor Richards and copper amalgam plate or rub- has found wide acceptance ber matting can be installed to throughout the mining indus- su~tconditions. The Denver try for panning small amounts Mechanical Concentrating of fine material. The surface slmoler Dsnrrr Msehanleal Coneen- pan is a self-contained ma- is white, with baked enamel tratlnqPU wlth ~rornrneisc,een chine, being equipped with a finish. This pan is an ex- msolin~eneine. V-belt drive. vannlns Pan o-~-~~~~- - ~ . . tremely useful item to have water pump- and suction hose about your mill for studying with a foot valve. All units the various mill products in are mounted on a welded, order to observe mesh at which minerals are freed, amount structural steel base and proof sliming, efficiency of operation of various units, and other vided with skids for mobility. factors which may be approximately determined by visual This unit, as a duplex ma- examination. Shipping weight is one pound. chine, consists of two separate Denver Mechanical Concen- ORDERS trating Pans driven by the same power unit. The distinct Delivery is normally an important item advantage of the duplex unit is that one set of pans can be in selecting equipment. Delivery estimates, cleaned up while the other set -ie still-...... in oneration..r This is a based on conditions existing at the time Duplex Denver Mechan~cal Cmm- valuable feature when using tcat,ng Pan with Trammel screen the unit as an amalgamator in quotations are made. are subject to adjust- circuit with a stamp battery. ment at the time your order is received. (Continued an next page) PEBBLE MILL. Abbe Overall Dmcnsions Pullcy Motor Approx .- .Mill sllc H.P. I Shtpping THE Abbe Pebble Mill is par- size . Werght ticularly sdaptcd to pulver- LWHD~am. Face Dry l._pl Wet Lb.. . - 0 izing or mix~ngcithcr dry or 21; 8: 6" 10'6" 48" 12" 40000 wet materials. Ic 18 7 9'6. 40" 12" 31000 1B '16' 7' 9'6" 36" 12" 27000 This unit is of thv b;itch or 1A 14' 7' 9'6" 30" 10" 23000 intermitlent typz. The cylin- 1 13' 7' 9'6" 30" 10" 21000 28 der is approxiniatrly hdlf fillcd 12 '6" 6' 7 '6" 28. 10" 17500 2 10:6" 6' 7'6" 28" 8" 14000 with flint pebbles, porcelain 3c 11 5' 6" 6'9" 24" 8" 10000 3A 10' 5' 6" 6'9" 24" 6" 9000 balls, or metdl balls: the In+ 4A ' 8' 4' 9" 6'2" 45" 6' 6285 terial is put into the cylinder; 5A 7'6" 3'10" 5'0" 36" 6" 4800 a tight covcr is fastened sc- 6A 5'9" 3' 4" 4'9" 24' 4" 2290 7 4'9' 3' 4' 4'9" 24" 4" 1925 curdy, to seal the mill hermet- 8hB 3'9" 2'9. 3'6" 22" 3" 1400 ically; and the cylinder is then 3'6" 2' 3" 3'3' 18" 3" 850 Abbe Psbble MIII. Styla GPS revolved until the fineness required is obtained. After that *Smes No. 0 to No. 3. mclurtvc, have gear reductton. Sizes No. 4 to No. 9, inclus~ue,have pulleys mounted on cylinder rhaltr, but we supply the tight cover is replaced by a grate dischargc covcr and the geat drive if desired There mills are also built motor drlven. cylinder 1s revolved untrl the material rs discharged, thc grate retaining the pebbles or balls. For dry grinding it is customary to enclose thc cylinder to prevent the spread of undesirable dust and also to preserve all of sample to insure accuracy of testing procedures. 11; wet grinding, the same directions are followed except there is no casing required; and instead of replacing the tight cover with a grate cover, a special wet discharge cover, or the Abbe patented discharge valve, is used for emptying the mill. In rcqucsting recommendations for jar or pcbble mills, please state: (1) Material to be reduced. (2) Size at which it will be fed to the mill. (3) To what mesh it is des~redto grind to produce the finished product. (4) Capacity (lbs. or gals.) desired per hour. (5) Whether material is to be ground wet or dry.

Denver "Packaged" Filter Unit Uses Wet Vacuum Pump

PLACER UNIT, Denver Portable WELL-KNOWN throughout the world for finest mill cquip- ment, Denver Equipment Company nevertheless is very active in the development and construction of placer machines of various types and sizes to meet every need. (Continued on next page) PLACER UNIT (Continued from previous page) Since the grizzly, feeder, revolving scrubber-screen, Den- ver (Selective) Mineral Jig, gasoline engine, and transmission A nrime essential for mak- equipment are supported on a structural steel frame. the I ingr;onry In a placrr I.,Illgh portable plant may be moved forward to be within rearh of yardagr, and equipmrnt to the excavator digging bucket as the excavator proceeds. handlr it muit br put to work However, since the unit illustrated was designed for one as ioon as prrliminary testing particular set of conditions, it may not be the answer to 1ndicatr.i that thr exknt and your problem. Let Denver Equipment Company design and build your placer plant to suit your specific requirements and value of the ground warrants thus ensure highest economic return. .uch an Investment More complete information can be obtained by writing lnnum(.rable local conditions any Denver Equipment Company office. wtll govtbnl the dm~gnof tht. plant and thtwfore thr p1act.r op.r;tor will lind thr facili- PLACER UNIT, Denver Trommel-Jig tlrs and f.xpcrirncr of Denvrr Eaul~mrnl Company of thr DENVER Tronunel-Jig Placer Unit is driven by a gasoline mnvar Partable Placar Unit Mounted griaiest benefit in the inter- engine or electric motor which also drives a centrifugal water on Pnaumatm Tirar pretation of 'these conditions pump, furnishing water for washing in the trommel as and the solution of particular well as for use in the operation of the Dcnver (Selective) operating problems with which he is confronted. Mineral Jig. A rubber suction hose, reinforced with steel wire With the rapidly mcreasing use of the Denver (Selective) coils which are imbedded in the walls of the hose, and a foot Mineral Jig comes a new era in the design of these plants. valve..are furnished Due to the proved, efficient action of this machine, a much - The entire unit is mounted greater capacity can be obtained from the same size plant on a steel base with steel (and investment) and the plant can get in more productive sides for easy transportation operating time because the jig provides an entirely continu- from place to place, and the ous operation without stops for cleanups. Furthermore, the trommel and jig are supported jig makes a higher recovery by saving hematerial which on a structural steel frame previously was not recoverable. which ca?ries necessary shaft- Illustrated above is such a plant mounted on pneu- ing and belting, making the matic tires for dry land operation, although flanged wheels unit completely self-contained. for rail transport or steel drums for timber runways can In operations where the be used instead where this may be desirable. The operation Denver Trommel-Jig Placer is as follows: Unit is used for the recovery Gravel or sand excavated by tractor shovel, drag-line or of gold from gravels, the black scraper bucket from the placer deposit is discharged to sand values which are concen- the top of the grizzly. Oversize rocks and pebbles roil off ::",;::~,".",:':~~;,~:~~,"'~;~~S~~~ trated in the jic hutch can the grizzly to the ground. cften be reground and amal- Undersize material, 2, 3, or 4 inch diameter, falls through gamated with minimum effort and at lowest cost by means the grizzly to a hopper under the grizzly. Under the hopper of the Denver Amalgamation Unit. This unit, when followed is a feeder equipped with a heavy rubber belt and having an by the Denver Amalgam Separator, makes possible the adiustable stroke which delivers the gravel to the revolving efficient production of an amalgam ready for retorting to sciubbr-screen. bullion. Wash water is delivered to the feed end of the revolving In many placer deposits the values are associated with scrubber-screen and also to outside of revolving screen. clay or cementing materials and with masses of black sand.~--. Oversme material from the revolving screen falls to a In order to secure concentration of the mineral particles, portable rubber belt conveyor stacker which elevates it to both coarse and fine, it is necessary to thoroughly disinte- the tops of the tailing piles. grate and wash the gravel. The material to be treated is The undersized gravel, falling through the openings of the shoveled or dumped into the large feed hopper and then revolving screen, flows to the Denver (Selective) Mineral Ji is fed regularly into the washing and disintegration section which recovers coarse and fine gold particles, together witf of the rotating trommel. This disintegrating chamber is the~~~- hlack sand ~articles.in the hutches in the form of a clean, equipped with spiral lifting blades which elevate and mix high grade concentrate.' the gravel several times during a revolution. Water is The tailing from the jig flows to a riffled sluice which added at the feed end of the machine and the action se- serves to recover any gold which may have escaped be- cured by the lifting blades breaks up the lumps of cemented cause of surges or irregularity in the feed to the Denver or clayey materials so that the desired minerals are freed (Selective) Mineral Jig. and separated' (Continued on next page) The material then passes on to the screened section of the trommel for the removal of the washed large particles from the undersize. This screening section includes an inner screen made of steel plate having rectangular openings. Surrounding this heavy perforated plate is an outer replaceable screen of 3, 4, or 6 mesh steel wire screen, depending upon the character of the material being treated. The washing action is continued in this screening section so that the oversize material is discarded at the end, thoroughly washed and free from any adhering valuable particles. This is particularly important in placer operation. The material which goes through the screen is caught in lnrtallatlon at Denver (Patentad) maximum return' a hopper and passes to the Denver (Selective) Mineral Jig surer-agitatorand canaitioner.in These plants have been which effects a selective gravity concentration, separating the Clnrdlan Caneentrate Trealrncnt made possible through the de- heavy particles from the light gangue. The Denver (Selective) Plant velopment of the Denver Mineral Jig is a complete self-contained unit that can be (Patented) Super-Agitator operated with minimum water, requiring only one-half as And Conditioner which successfullv breaks down the koth much water as other types of jigs. formed by the reagents in the Hotation concentrates. These More complete information can be obtained by writing agitators also speed up extraction time and are most efficient any Denver Equipment Company office. in mmtlng pulps. flowsheet is m~tple,ut~l~zmg a ball ~n~ll-cla.dier clrcult for regrmdmg concentrate\. .t >cries of Ilc~i~v(~(Patented) Suwr-Aa~tatorAnd Cond~t~oners.;I clarifier, zinc dust feeder; a pr&ipitatian agitator, a p;e- cipitation tank, a storage bin, and a furnace. The number and size of units will, of course, depend upon capacity de- No. 2 1-2 6' 5' 5' 9' 6' 2 %' Ll'x12' Stmplcx sired. No,3 M 7: "1 1 " Yi:1 "12: 1 Duplex There are three standard plants available: 2 to 3 tons, No. 6 ( 4--6 1 8 7 / / 7 5/6 12'x18 Duplex I I I , 5 to 7 tons, and 7 to 10 tons per day, although equipment for any size plant can be supplied. Upon receipt of the neces- *Gravel or rand, bank run sary information, an estimate can be furnished on a treatment plant which will meet vour reauirements. Some ores Approximate require roasting in the ~enve;(~dw&ds Type) Roaster and Pump Sh~ppmgWclght Pounds others may be treated in combination with amalgamation Domcdc Tt- most economically. More complete information can be obtained by writing any Denver Equipment Company office.

PRECIPITATION EQUIPMENT, Denver Cyanide DENVER Cyanide Precipita- tion Equipment is designed to Recover Your Mineral As Soon And As meet the d(mar~dsof cyanidc plants for ;I low cost, eff~cwr~t Coarse As Possible. method of pre( ipitatma gold and s~lvvrfrom ;I cy;mde so- lut~on Metallurg1c;il r(.sult.< obta~ned w~ththis quipnwnt haw provtd h~ghly sat14;~c- tory and uiuhlly compare fav- PLANTS. Denver Cyanide Concentrate Treatment or;,bly w~th rt,.

LPpror.Ship. tion Wt . 24 Hra Lbs. 24 Hra Lb,. - - 5100 6550 7950 9450 10900 -- 6640 9950 13250 16560 19890 II I - *For other size interpolate by adding subtracting width of frames.

Use Denver Equipment-Standard the Please Give Us the Opportunity to World Over. "No Yearly Models But quote prices and delivery on standard Constant Improvement." equipment to meet your needs. Denver Adjustable ptroke Diaphragm Pump is des~gned PUMP, DIAPHRAGM, Denver Adjustade Stroke for convenient mounting on thickeners and hydroclassi- 2,3" and 4 fiers, and when mounted on a Denver Thickener may be driven from the thickener mechanism. Arrangement of SIMPLICITY and ease of dis- mounting is such as to place all parts so that an abrasive charge regulation - while in material cannot attack wearing surfaces. This insures longest operation-is one of the many possible life of wearing parts. distinctive features of the The Denver Adjustable Stroke Diaphragm Pump is avail- Denver Adjustable Stroke able in 2". 3". and 4" sizes and in sim~lex.dudex. tri~lex Diaphragm Pump. This is ac- and quadruplcx types to g1v6 a w~dcrange of chpacities for complished by means of a the pumping of dense pulps, dcwatcred concentrates, ta~llngs conveniently located hand- cyanidc,pulps, and all sludges and slurrlcs. As a filtrate' wheel which operates a heavy pump, it ensures positive, trouble-free removal of solution rod, moving the pivot end of from filtrate receivers at lowest cost per unit of capacity in the connecting rod closer to filtering operations. the fulcrum point of the walk- Cast steel, cast iron, and structural steel members make ing beam, or farther away, to up the rugged mechanism and rigid framework, while bronze increase- - or decrease the stroke. bearings are used at the critical points. Maximum diaphragm life is More complete information can be obtained by writing assured by the vertical motion anv Denver Equipment Company office. of the rod operating the diaphragm, resulting in the elim- ocnrsr Adiuatabla stroke ination of excessive flexing Diaphragm pump and wear. Also, the diaphragm is always wet on both sides; Solids in Pulp Solids in Pulp Solids in Pulp preventing drying and resultant cracking. Valves are rubber - faced and valve seats are rubber covered. The discharge 13% 50% 60%33 bowl may be set at any one of four quadrants. Single or Simplex 38 53 54 45 65 double discharge bowls are available as desired. All valve Duplex 76 16 108 90 130 1 1:: 1:: parts can be replaced without dismantling the pump. Triplex 114 159 162 135 195 197 144 216 240 Quedruplcx 142 212 216 170 260 276 192 288 320 (Continued an next page) Simpler Duplex Trlplcl Quadruplcx Simplex Duplex Triplex Ouedrudcx ---. t. Pulp Per 1 Dry Solids t. Pcr Tan icP- Gravity P. . . .

(Continued on next page)

Denver .Ore Tests are made on an ,, actual cost" basis. This brings the world's finest laboratory equipment and skilled technicians to your service at a very low cost. Denver Diaphragm Pump Acid-Proof Construction (Continued from precedine ~aee) 1 ..Capacity-Tons Solida Per 24 Hour. (Specific Gravity Solids 1 4) Pump 1 1 1 1 .Ceoacitv-Cubic Feet Per ~lkute---~sxnmumStroke i 1 Normal Normal -Normel Soccd PIType I ", Stroke / Solids in Pulp 5. Simplex 406 418 5" Duplex 812 836 I (~3yl00/,/-G 5" Triplex 900 I218 1254 5' Quedruplcr 1624

518 525 6" Duplex 1036 1050 1554 1575 2072 2100 Cu Ft Pulp Per Ton Dry Sohds 54 0 43 5 Cu Ft Per Ton Pulp Speclfic Gravtty Pulp

'Tepecity-Tons "Capacity-Ton. Solids Per 24 Hours Solxd, Per 24 Hour. 1So.Grav1tvSo1ids2.7 So.GrevitvSolida4.2~ 'Specific gravity of Ruid tn pulp is taken as 1.00 and 40 R.P.M. is speed Pump Type i used. However, pump may be operated from 25 to 60 R P.M Sizc I 1 Solid. nn Pulo Solids in Pulp Approx.

Simplcr 453 636 675 Duple= 906 I272 I350 Triple. 1356 1908 2025 :: Quadruple= -- 1812 544 2700 CU. Ft. Pulp~ Per Ton Dry Solids. .. . . 77.5 43 8 33 6 Cu. Ft. Per Ton Pulp. . 25 4 22 0 20 0 Specific Gravity Pulp 13 15 16 PUMP, DIAPHRAGM, Denver Adjustable Stroke - \, 5" and 6 >,c Feet Per "urn Strokc THE 5 and 6" Denver Adjustable Stroke Diaphragm Pump Spccd has the same distinctive features as the 2", 3" and 4" sizes, Pum~ Sire s I" 1.~1~ plus exceptionally high capacitv. One 6" Denver Adjustable -- Stroke Dia~hragmPump has a capacity-equal to that of - zk four 4" pumps. Pump capacity 5' can be varied one .hundred percent while the pump is 5' 30 4 25 2 running by means of a con- 5' Trnplcx 40 I li'-3' 54 0 57 0 veniently located handwheel. 45 1 37 Mechanical advantages are: 5' Quad- 40 112'-3' 72 0 76 0 60 8 50 4 (1,) Valve can be removed ruplcx I w~thout stopping the pump: 6' Simplcx 40 2. -4' 23 0 24 4 (2) Bowl can be set to dis- rhare~in anv of foul quad- 6' Duplcr 40 2' -4' 46 0 48 8 6" Triplex Denver Adlustable Stroke ia"tz (3) v&ical diaphragm 6' Tnpkx 40 2' -4' 69 0 73 2 Dialhragm Pump motion prolongs life of dia- I phragm: (4) Bronze bushed 6' 40 1 2: -4' 92 0 1 97 6 1 hinge points and heavy main bearings: (5) Drive through cut *Minimum speed 20 R.P.M.. normal sped 40 R.P MI.. and maxnrnum tooth gears to the eccentric shaft: (6) Frame of heavy welded speed 50 R.P M. steel construction: (7) Alernite fittings for pressure lubrica- **For computing capacities rho-. specific gravity of liquzd in pulp waa tion insure minimum repair and operating costs. taken as 1.00 and normal operating speed of 40 R.P.M. wao used. Pump is available in 5" and 6" sizes and in simplex, du- (Continued on nexr page) plex. triplex, and quadruplex types to give capacities ranging from 400 to over 3,000 tons of solids per 24 hours. 158 DIAPHRAGM PUMP (Continued from previous page) PUMP, DIAPHRAGM. Denver Suction-Pressure DENVER Suction - Prebsure piaphragn Pump is the solution to pumping problems which involve the handling of all types of pulps and slurries, particulsrly where elevating mater~al to a point higher 6' Simpler 3'6' 4'2. 5'4' 1 3 2400 1 2630 than is possible with an open 6' Duplex Y'& 4.2. 5'4- :P% :;;: I 4460 dispharge diaphragm pump. 6' Triplex / 1 4'2: 1 5'4: / 6290 6' Quedru- 10'9' 4' 2 5'4 7520 8250 Pumping against a discharge head up to 20 feet is pouible with this unit. It is also an ideal filtrate pump for discharging the solution from a 4" Denver Suetion-Prclrure filtrate receiver in the vacuum DlaOhragm Pun30 circuit of a filter system where PUMP, DIAPHRAGM, Denver Lowhead the vacuum is not greater than 15 inches of mercurv-. The fine solids that are- - often DENVER Lowhead Diaphragm present in filtrates will scriously damage an ordinary cen- Pump is an inexpensive, re- trifugal solution pump, but are handled w~thouttrouble by liable unit for pumping thick the Denver Suction-Pressure Diaphragm Pump due to its pulps, concentrates, sludges, outstanding design features and adaptability. and slurries; it is ideal for Carefully engineered throughout, this pump is simple in pumping thickener underflow. design and operation. The 31" size has a single heavy rub- The lowhead design re- ber diaphragm and is available in the simplex type only. quires a minimum of head- The l'h'', 2", and 4" sizes have two heavy, molded rubber room and construction is so diaphragms, and are available in simplex, duplex, triplex, that replacement of diaphragm md quadruplex typcs. Thus, almost any range of capacities and inspection of parts is sim- uesired can be obtained by varying size and type, D,alhragm The vertical flow pulp through the pump and the vertical PU~D+PU.D .t L~I~in open PO- ple. The entire upper casting. lit on and Olher Pump 0% Rsadr for Shown in the illustration, position of the diaphragms make it imposible for air. D~erallon hinges backward, bringing the which would decrease the pump's efficiency, to collect in pockets. Alsu, when a diaphragm wears out or breaks, diaphragm and rubber faced there is no spray or splash of pulp outside the pump as in valves into easy accessibility. The pumping stroke may be ordinary suction-pressure pumps. This is important in pre- quickly adjusted from 1%'' to 21'2" by revolving the ecmntric. venting injury to operators when pumping caustic pulps. Available in simplex and duplex types. Variation in stroke on all sizes is made possible by means More complete information can be obtained by writing any Denver Equipment Company office. of an adjustable eccentric, and on the lli", 2", and 4" sizes the capacity may be further regulated by admitting air during the suction stroke-through a small needle valve- UC~pacrfy Dimcns~ons Approx. Shlp this having the effect of varying-the suction and therefore *Pump Tons Per Speed Motor Wt. Lbs. Suc 24 How 1 4 H.P. IA-Belt Motor allowing finer capacity adjustments. Both belt driven and motor driven unit.; are available. All sizes are equipped with replaceable rubber valve seats. 1 'Simplex 59 5040 32. 25. 28' 3i 300 525 1. Duplex 118 50~60 32' 43' 28' 1% 690 860 Valves and valve seats are readily accessible from the side opposite the diaphragm, without disturbing the diaphragm. by simply unbolting the pump's removable side plate. i:: 1430975 1115710 1 ::2:1:3: :l>m:z:i Ball valves are standard on the 3h" size and tapered valves with repl3ceable rubber wearing faces are standard on the 'Simplex and duplex pumps with 2'' and 4" xntake pipes a130 available -data on I" pump ldentlcal to 2" srze and data on 3" identical to larger sizes. 4" sx7.e. More comnlete information can be obtained by writing **Ca acity 3s with pump ope-ating at 50 R.P M. and full stroke on a any Denver Equipment Company office. of specific gravrty 2.6 and rstio of drlution I :I. (Continued from preceding page) Approximate Motor Shipping Wt.. Lbs. *Capacity- H.P. Maximum Belt Belt Motor Stroke-- Pump Ranae Net Boxed Net Sire Stroke 40 R.P.M. -- %'S~rnplex I'h' a%%' O'10s6 '4 45 60 115 Cu. Ft. Gallons Per Min. Per Min. - -- . -- ~M:Simplex 1'8' 1'69i' 1'3%" '4-1 I80 280 355 .,y4" Simplex 40-60 0.31 2 3 1% Duplex 8 3'1;~' 1'3%' 1-2 350 480 660 I 1%' Triplcr 1'8' 4'8%' 1'3%' 2-3 520 a5 860 I !< " Quadruplcx 1 '8' 6 '3" 1 '3% ' 3-5 690 885 1330 I %" Simplex 40-60 I %" Duplex 40-60 2" Simplex 2 '4>, ' 1 '10' 1 '6: I~ 1 M 360 455 590 1%'' Triplex 40-60 2" Duplex 2 '4Xm 3 '2' 1 '6 2-3 710 860 1050 I S" Quadruplex 40-60 Trsplcx 2 '4% : 4 '6. 1 '6 ' 3-5 I050 1250 1690 ; Quadruplcx 2'4% 5'10' 1'6' 5 711 1390 1685 2140 1" Simplex 40-60 2" Duplex 40-60 4" Sxmplex 2'10' 2'3. 2'1 '2" 1 18-2 800 950 1110 2" Triplex 40-60 4" Duplex 2'10' 3'1;' 2'112' 3-5 1580 1770 2220 2" Quadruplex 40-60 4" Tnplcx 2'10' 5'7 2'1 L2" 5-7'1 2350 2610 3000 4' Quadruplcx 2'10' 7'3' 2'1'4" 7 '1-10 3150 3410 4000 4" Smplex 40-60 6" Simplex 4'0' 3'5%' 3'1' 5-752 2600 2930 3350 4" Duplex 40-60 6. Duplex 4'0' 6'4%'3'lr 40-60 7%-10 5180 5470 6030 4" Triplex Trrplex 4'0' 9'2h'3'Ir 10-15 7950 8360 9035 4" Quadruplex 40~60 z; Q~adruplcx4'0' 12'12' 3'1. 15-20 10480 10945 11680

PUMP, SAND, Denver Nor-Sand Centrifugal *Capacity Tons Solids Per 24 Hours (40 R.P.M.) ( -- Solids In Pulp Solids In Pulp Solids In Pulp THE Denver Nor-Sand Cen- (Specxfic Gravtty (Speclhc Grawty (Specific Grawty trifugal Sand Pump is an %zP Solids 1.4) Solids 2.7) Solids 4 2) evolution in pump design -- I - 33% 50% 60% 33% 50% 60% 33% SO0/ 60 which overcomes the many .-I difficulties encountered in %,,s 4 5 8 0 10 0 handling abrasive materials. An unimpeded Row of pulp lys 11 17 19 LS-D 22 34 38 to the imwller is assured. as IM"T 33 51 57 oenver N~~.s~~~csntrtfugal sand provision -has been made' to Q 44 68 76 PU~P prevent coarse material from 2"s 34 44 47 settling out by providing the Z"D 68 88 94 pump with a central inlet on the shaft side of the casing. Z"T 102 132 141 An extension on the gland projects into the zone of centri- Z-Q 136 176 188 fuge within the impeller, thus eliminating back pressure on 4 91 123 130 the packing gland. A very small amount of gland water is 4 182 246 260 required to keep the gland free from grit (as low as Yz 4 273 369 390 364 492 520 of 1% of the total volume pumped). As a packing gland is Q effectively used, the pump develops suction which not only Cubic Feet Pulp Per Ton Dry Solids ensures a steady flow of feed but obviates placing the pump 91 54 9 44.3 1 77.5 439 33 3 1 71 5 39 6 29 1 at any great depth below its feed sump. While normally the Denver Nor-Sand Centrifugal Sand Cubic Feet Per Ton Pulp Pump will give satisfactory results with an all metal inlet, 29 27.4 26 4 j 25 4 22.0 20 0 23 8 19.8 17.4 I impeller, and casing; there have been developed a rubber Specific Gravity Pulp lined inlet and casing which give excellent service under extremely severe conditions. The rubber liner for the casing is 1 1.10 1.17 1.21 / 126 146 1.61 / 134 1.62 1.84 I I so installed that there is no possibility of sand or solution entering between the housing and the liner. 'Capa~~~ies?how" arc for one loot suction head and one fool plessure head. Increasc I" total dynamic hcad w~lldccrease capautres shown. The bearings are protected from liquid or grit by a ''mud slinger" mounted on the rotating shaft. and also by a felt oil seal incorporated in the bearing cap. Hand can be changed in field and horizontal, vertical, or direct-connected motor mountings are available. Your comments and suggestions are Additional data gladly furnished upon request. always welcome. Please write to us. (Contmued or next paae) I 20 Fwt Hrad IUFwt Hrnd 60 Foul Hrad the vertical design, with motor OR the floor. Smaller sizes are portable for pilot plant or unit operation. Wearing parts can yap. , 30' : Sold. Pulp ( 30'' Srhdr Pulp I 1U'. Sohds Pulp Pump I CAI%. SpcrLfir Grsv.fy I Spcrlfi~Gr;jvlfy Spr~oh< Grov,ty be easily cleaned when used in processing plants. Alloy parts 2 .Smr Prr Sol8ds R Solid, 1 X Sol~drl X can be furnished for special conditions. Drive can be by belt or motor and motor drive V-belt or direct connected. The Denver Vertical Centrifugal Sand Pump is a sim le flexible, pumping unit that has solved many extremely $if: ficult pumping problems. Let us consider your pumping problem and make recommendations for the type, size, and number of pumps to most effectively and economically sat- isfy your pumping requirements. Additional data gladly furnished umn reauest.

. .

*For each 646 8 gallons of pulp pumped (sdution having 30% sohds by weight, and rohds having a specific gravity of 2.8) 1 ton (2000 Ibr.) of dry rock will be handled.

Approx. Shxp. Dimmsiona Wt.. Lbo. -- W H Belt 'Motor

*Based on motor suitable for use on pump working against a 20 foot head and handlmg average capacity of medium density pulp.

PUMP, SAND, Denver Vertical Centrifugal DENVER Vertical Centrifugal Sand Pump is designed to handle frothy concentrates or any material that will flow by gravity into the pump bowl. I The distinctive design fea- 'Furmrhed wlth vertical Ranged pulleys for flat belt-mule drive at- ture of this put lp is th; the tachment lor round rubber belt or mule-stand for V-belt drive. ?Shipping we~ghtrare for Largest motor recommended 6th highest dl$- feed falls into the large pump charge head given in table. bowl. Frothy material is bro- ken down. The pulp or solution then falls by gravity into the horizontally rotating impeller. Fluctuations in feed are taken care of by the pump bowl. No feed box is required. A totally enclosed vertical Ocnver Vertical Canlr~fugal Sand shaft 'assembly contains the PumD anti-friction be a r i n e s that carry the vertical shaYft. The impeller is securely fastened by one nut, which facilitates quick replacement when necessary. No stuffing box or packing gland is used. Floor space requirement is low, due to Use Denver Equipment-Standard the CAPACITIES OF DENVER S.R.L. PUMPS These capacities are based on water. Multiply listed World Over. "No Yearly Models But horsepower ratings by specific gravity of pulp to obtain Constant Improvement." actual brake horsepower. Increase calculated total dynamic head by 10% to allow for maximum wear of rubber parts.

UMP, SAND. Rubber Lined (Type SRL) Capacity 'Motor HEADS H.P. and THE Rubber Lined (Type Pump US. Pump 20 30 60 S~ze G.P M. Spccd Foot Fvot Foot SRL) Sand Purnp is recog------nized as standard equipment R.P.M. 1.7 H P. 1280 for handling abrasive pulps in R.P.M. 1 .8 the mining mdustry. Reports H.P. 1290 from m~lloperators ernphalzt? 2" x 2" R.P.M. 2.0 its efficiency. dependability, H.P. 1300 durability, and economy. Need R.P.M. 2.2 for standby units has been H.P. 1310 rlm~inated. In most cases thc R.P.M. 2.3 Dower reouired for the opera- H.P. 1320 ;ion of tcis pump is one-half R P.M. 2 5 ubber ~~~~a ~TYWSHL, H~~~~~~~~I' H.P. 1330 and Pumu With Overhaad Motor that required for operation of Mountma R.P.M. 2.9 eouivalent all-metal pump and H.P. 1350 tiis is an important factor. 3' x 3" R.P.M. 3.4 The saving In power alone pays for the cost of this pump in H.P. 1303 from four to twelve months. At the same time the efficiency of R.P.M. 3.8 this pump is to 3 times that of other types of sand H P. 1315 pumps. Rubber parts give a service life of four to ten times R P.M. 4.2 that of the best alloy mctal parts obtainable. Many Rubber H.P. 1331 Lined (Type SRL) Sand Pumps handling mill tail~ngshave R P.M. 4.75 not replaced wearing parts in three years. An average llfe H.P. 1350 of wearing parts of from one to two years is common and R P M. 6.4 H P. 940 instances of extrcnlely long life of wearing parts arc not R.P.M. 6 9 uncommon H.P. 944 Thc rul1111.r cov~~.mlpa1.t~ consist of a hcnvy pressure 5" x 5" R.P.M. 7.4 mol,led ~.ublrrcovc~,cd i~nprllcl. and a casinr linrr. The H.P. 948 rul~bt~rinipellt~r i~. ill, opcm style for the sizes covered on R.P.M. 7.8 pace I(;;, 'l'hc typ~"("' pumps on pares l(iX and 1(;0 hnve H.P. 952 s,or for a H.P. 971 ho~.izontaldrive wlie~~the motel. is rno,inl,,d on n separnte R.P M. 20.5 t1:1sc on :*I1 SlZ,.\. H.P. 988 R.P M 22 6 More complete informailon can be obtained by writmg H.P. I005 any Denver Equipment Company office. R.P M 24.9 H.P. 1023 R P M. 27 4 1042

*TO convert to lmperlal gallons. multiply by 0.833. 167 - o C "I-*Iu d; % 1:

~($~lg??F:1/,/~321~~~I

--o =I-mo moor ~~i~~~;!2~iIi~5l;1i~$~lsI;, .

--I I I I 2 2-*-?! 1: I; I: I;?

::em- PUMP, SAND, Wilfley Centrifugal PUMP. VACUUM, Gardner-Denver

THE Wilfley Centrifugal Sand THE Gardner-Denver "AA' Pump is used by the mining Vacuum Pump is well known and other industries through- throughout the world as one out the world. Oifficult ma- of the most widely distributed terial handling requirements and most completely satisfac- have been sat~sfactorily met tory single stage, vertical, vac- for years by this outstanding uum pumps ever built. centrifugal sand pump. The force feed lubrication Direct-Connrclra Motor Driven There are many distinctive system, g e n e r o u s bearing w''rky Purnu features incorporated into this areas, simplicity, accessibility. unit such as the well-known and smooth running qualities, centrifugal seal which eliminates the need for the customary p I a c e the Gardner-Denver stuffing box; slippage seal adjustment; extra heavy Wearing Vacuum Pump far ahead of parts of rubber or metal, changeable in a few minutes time; many similar competitive com- and unit construction ball bearing shaft assembly. pressors. These pumps can be Drives can be arranged as either direct-connected, or for used as compressors if desired flat or V-belt. Motor mountings for V-belt can be made Let us make recommenda- either vertical or horizontal whichever is most suitable. tions for the type and size vacuum pump or compressor best Overhead motor and V-belt 'drive is available on all sizes suited to meet your particular requirements. up to and including the 4" size. More complete information can be obtained by writing SINGLE CYLINDER any Denver Equipment Company office. Displace. ~i~~~i~~~,~~~h~~ ~~~irnurnApprorimate merit ~.p. Shipping Wt.. Lbs. Cubrc Feet ------Rccom- -- -- Per Murutc L W H mended Belt Motor --- -- P -- -- 11 0-32 0 026 1 1 285 1 16"'285

DUPLEX

V-TYPE FOUR-CYLINDER Mounted On

All we ask is a chance to help you and the opportunity to work with you on your equipment needs.

-Approx~mate overall d~menrmnr for standard belt driven unrts. Length includes mmimum clearance for removing wearing parts.

170 PUMP, VACUUM, Ingersoll-Rand THE Ingersoll-Rand Vacuum Pump can be furnished to meet all requirements for Motor Denver Rotary Drum Filters H.P. and Denver Disc Filters. Also, Two other problems requiring a Stagc reliable and constant source of vacuum are effectively solved by these pumps. - For the smaller installations, - the Type 30 dry vacuum pump - is recommended. The general 1 Tma 30 Dry Vacuum Puma With At. - data on this vacuum pump 2 Cmled Cylinden and HcadtNota - Corn!mct Conatrvction is given in tables under pumps 3 for displacements of from 9 to -- 100 cubic feet per minute. 5 For medium sized installa- I'll1 I I I tions, the Type 15 vertical. *For continuous operation below 22 inches Hg. vacuum, a 5 H.P. motor double-acting, dry vacuum should be used. pump is preferred. The Type TYPE 30 15 dry vacuum pump is a ver- 'Pump No. Overall Dimcnsrons-Inches tical, water-cooled, d o u b l e- Shipping Data acting, single cylinder unit Compl. Elcc. I Comp1. Elcc. with a trunk-type piston. It Bare Umt Drwcn Unrt Bare Unit Driven Unit can be arranged as a single- stage, double-acting, or a two- Bascplatc Approx. Approx. Mounted Ship.Wt. Lbs. Ship.Wt.Lbs. stage single-acting unit. It is L W H L W S.etlon.1 Vlrwr of Type I5 Dry Vsc- UU~Pump Shoring Pnton Action available for flat or V-belt and Strong 1nlsrn.l Con,tructron drive, with or without a com------. - - -- mon subbase with the motor. The general data on these vacuum pumps are given In table under pumps for displacements of from 91 to 250 cubic feet per minute. ------For larger sizes the Class ES V-67x5 38 27 58 1 29 I 31 1 655 700 1 980 1080 IIIII~II I I vacuum pump is recommend- number ed. This is of the straight- 'For of pump as bare unit, see table above. line single cylinder, horizontal TYPE 15 cro&-head tvw, designed to operate at moderate speeds Overall Dimcnsionn-Inches and built for heavy, continuous service. Unit is available in single or two-stage con- -- struction. Single-stage units are double-acting. Two-stage Compl. Elcc. units are single-acting with opposite ends of the single cyl- Rare Unnt Drivcn Unlt inder arranged in series. The Class ES units are adaptable to ------any type of drive: V-belt, short belt, long belt, or direct-con- C.F. C.F. Stagc Stagc nected synchronous motor drive on the larger units. The M. M. tables following give general data on vacuum pumps for dis- LWHLWH placements of from 9 to 2,832 cubic feet per minute. ------2-400 1671 91, ' - -- 7>/2 5 23 44 45 23 46 (Contmuca on next page) ------4350 250 137 *lo I0 1: 26 50 53 29 52 *If 12"n6" size is sold for operation at or near peak load continuouoly, a 15 H.P. motor should be used. (Continued on nexr page) TYPE I5 PUMP, WATER, Fairbanks-Morse Centrifugal

Each Shipping Data THE Fairbanks-Morse Cen- Cylinder --- , - trifugal Water Pump is a Complete Electric sturdy, inexpensive, side-suc- Bare Unit Driven Unit --- tion, ball-bearing pump of Approrimate Approxirnstc up-to-date design and con- Shipping Wt. Borcd Shippins Wt. Borcd struction and is ideal for many 4 Pounds for Pounds for 6 ,,, Export -- -E-rt applications. It is particularly Cu. Ft. Do- CU. Ft. easy to dismantle as all parts mestic Export --- -- are readily accessible. The 10. 5' 22 1400 1450 58 pump is built of highest qual------I.. Cenhilugal Pump ity materials and ~ is highly 31 I775 1 1950 72 I efficient due~ to ~ desien~~- resulting from long experience. CLASSES ER. ES. AND FS Various sizes and models are available to suit most pumping requirements. Units are built in sizes ranging from %" Cylinder Diemctcr to 8" outlets, for capacities from 5 to 3,000 gallons per min- Inches Borcd Smcd for ute, and for operating against heads up to 160 feet. Steam R.P.M. Expo71 These pumps are desizned and built for both eeneral serv- C". Ft. ice and heavy duty and may be driven by eGctric motor, diesel engine, or gasoline engine. Drive may be by flat belt, V-belt, or pump may be direct-connected. Parts are interchangeable and, when necessary due to the nature of the liquid being pumped, may be replaced at moderate cost. Additional data gladly furnished upon request. FIGURE 5520P

I - **Dimensions Motor 15 Ft. Head H.P. WH- charge) ir--- -. -. . .- -- -

8 8 *These sire (Class ER) have babbittcd sleeve bearings instead of ;< 15:i.. 10,. 9%" Timken bearings: sight-feed cylinder lubrications: and frame construction. They are not built for steam drive or synchronous-motor drive. 10%'' 10%''

CLASSES ER. ES AND FS

Dvcrall Dimcnsiono (Bare Unit) Fcet-Inches Appror. Ship. Wt. Lbs. *Figure 5520 pumps for capactties up to 175 G.P.M.or against heads ___I-- up to 70 feet available. **Dimensions are for bare pump without bare. Lrngth (Continued on next page) FS (Less Mo-

Mill design and Flowsheet design are also services of Denver Equipment Co. Write for details how these services might help you. (Continued from preceding page) REAGENTS, DRY AND WET. Denver Flotation

IGURE 5 J QUANTITY warehouse stocks of common flotation reagents arc rar-ried in Denver. As ncw reaacnts are d~vcl- Motor tDimensians oped they are added to our list of stock items which Speed R.P.M. H.P. include: Aerofloat (15, 25. and 31) Barrett Oil No. 4, I-.-Ly~-Rarrett Oil No. 634, Caustic Soda, Copper Sulphate, Crro- -- - sote (Cleveland Cliffs No. 1 Hardwood), Cr~sylicArid, 2000-2510 1.3 15%" 9%" 10" Lime, hfetso, OTeic Arid, Yarmor F Pine Oil, Quebracho, Reaxmts Nos. 208, 301, 404, Soda Ash, Sodium Acrofloat, 1550-1800 3-5 17%" 13%" 14'' Sodium Cyanide (eggs and granular), Sodium Silicate, 1200-1530 3.7% 25%" 13%" I?!,;" Sodium Sulphite. (Santosite), Thiocarbanilide, Potassium 26%" 15%'' 18%" Ethyl Xanthatt, Z-2, Sodium F:thvl Xanthate Z-4. Potas- 1240-1600 ?!;-I5 si~mAmy1 Xanthatc 2-8, Potassium Isopropyl Xanthate 1380 15 30:<" 17%" 20%'' Z-9, Potassium Hexyl Xanthatr Z-10, and Zinc Sulphat~. 1310-1740 15-30 31" 19" 20%" Information on the reagents in which you are interested will he sent on request. 37%" 21%'' 25" 1335 30 Write for our Reagent Bulletin No. R1-B2 listing over 1340-1440 40-50 37%'' 23%" 26%'' 200 rrtaqrnts ~~srdin flotation of mrtallies and non-mrtal- -I lics and also many industrial uses. *Sizes 1". I?;''. and 2" have suction and digcharge cannections tapped in volute. **Figure 5510 pumps for capacities up to 2.200 G.P.M. or against heads REDUCERS. SPEED. Denver up to 125 (cet avahble. tDirnensians are for bare pump without base. THE Denver Speed Reducer FIGURE 5530-31-32-33 eliminates unnecessary - 1 transmission equipment *Pump 'Camcity tDimensions thus providing compaci Size Frame 750 R.P.M. Motor (Dia- No. 0 Ft. Head H.P. 1- p--- drives, and assums positive charge) G P.M. LWH performance. It is made

~ - ~p-~- -~ ------with speed reduction ratios I 1" 25-75 1.1% 18v." 13%'' IM" up to 4,000 to 1 and with right angle, (vertical or 21%'' 13%" 14%" I " 25-75 1-1 % horizontal), or parallel 1% '' 100 18%" 13%" 15'' shafb for either light or hellvv- A,.+".J 18" 13%'' 15%'' .- - . - - . 1%" 125-175 Denver Vcrt~lalS~eedReducer D~WCTme "v" 1 y;" 125-175 3-5 22%" 14" 14%" 2" 200-250 23%" 15%'' 15" RETORT, Denver 3" 300-500 29%'' 17.H" 203%" THE Denver Retort is a low 4" 600-700 10 30" 183%" 2lYz" cost, extremely durable, iron 5" 800-1200 15-25 30%" 21%'' 20%'' unit for distilling mercury 24%'' from amalgam. The cover is 6" 1400-1600 25-30 ~ 374;" 23" carefully turned and ground 8" 1800-2000 30-40 1 38%'' 243%" 26651" for a tight fit and the outlet pipe is securely screwed into *Size 1" 1!4" and 1%" have tapped suctmn and discharge connections. the cover. **pumps ior ca&tin up to 3.000 G.P.M. or agamat heads up to 160 These Denver Retorts are feet available heavily built and fit into Den- tDimenaions are for bare pump without bare. \ ver &tort Burners. However, homemade stands or tripods can be used for heatina retorts over a fire or stove. Informa- Please Give Us the Opportunity to Plnt Oenver Retort-Note Heaw tion larger sizes Conslrvetion Providing Marimurn quote prices and delivery on standard s.fetr tha.. those listed will be sent equipment to meet your needs. upon request Size Shipping Wt.. Lbs.

4 54 No. 2 No. 3 I1 No. 4 4 20 No. 5 28 No. 6 p6 9% 45

Exterior View of Denver (Edwards are us* side; RETORT BURNER, Denver Type) ~oaster-~oteSne of Men on however, this is governed by Unlt Left of Center in Backwound the character of the material THE Denver Retort Burner being roasted. Arrangements gives a very intense heat for can be made for using pulverized fuel or oil, or other fuels retorting amalgam, and it is may be used which require hand firing methods. easily and quickly regulated. Rabblmg arms and shafts can be arranged for the circula- The larger size is equipped tion of cooling water where materials being treated require with a two gallon capacity temperatures high enough to warrant such an arrangement. tank, plessure tested at m0 For a sweet roast approximately 200 to 225 pounds of pounds per wuare inch, and a 10,000 BTU coal is used per ton of ore roasted. The horse- powerful, quick-acting brass power per spindle is from 0.2 to 0.3. Width of the simplex pump of the check valve type. unit is 6.6 ft. and the duplex unit has a width of 13 ft. The The burner, which is cast of length of each panel is approximately 4 ft. The costs of materials and construction will vary widely with location heat resisting bronze, is fully and local prices but the following is approximate cost of a 54 urotected from wind and , , I Approxnrnatr Capacity Tons Per 24 Hours Hearth Area Sq. FL.

------slmplc~ 10 Slrnplex 15 Duplex 24 12 Dupkx 32 11 Duplex 40 20 Duplex 48 24 Duplex 56 28 Duplex 30 Duplex % 40 1I1 1 IIIIII ROASTER, Denver (Edwards Type) More complete information can be obtained by writing any Denver Equipment Company office.

lnlerior View al Denver (Edwards a a a in Type) Raaatar showin. ~~bb~~~Dusting is eliminated because SOUND PLANNING CALLS FOR

(Continued an next pue) RELIABLE ORE TESTING! WRITE TODAY! ROD MILL, Denver Steel Head Slle Appro. Dimension. DrL ,1 THE Denver Steel Head Rod Per 24 Hrs. , Sue W H Mill gives the ore dressing en- .- 3'rS' gineer a very wide choice in 3.~6' grinding design. He can easily 3.~8' secure a standard Denver Steel 3'x9' Head Rod Mill suited to hls 4'xW particular problem. The suc- 4'xn' cessful operation of any grind- 4'riO' ine unit is lareelv dewndent 5.~8' 5'rI 0' wilh Laroe DmharOe Trvnnlon the ground pulp, The Denver 5'r 12'

Steel Head Rcd Mill is avail- b'rn' able with five types of discharge trunnions and each type Wx10' trunnion is available in small, medium, or large diameter. 6'rlZ' The types of discharge trunnions are (1) overflow, (2) per- - forated overflow, (3) return spiral, (4) grate, and (5) peripheral. Thus the engineer can fit any one of fifteen Ap~rommale Horsepower Rod Charge Sh~ppmgWl . Lbr variations of sizes and type of discharging a rcd mill, into - -- .. . Pounds the problem on which he is working. Dia. Face To Run Motor Belt Motor The superiority of the Denver Steel Head Rod Mill is -- - 30"8" 4500 8700 8700 due to the all-steel construction. The trunnions are an 30"lO" 5500 9450 10500 integral part of the cast steel heads and are machined with 30"lO" 7500 I0850 12300 the axis of the mill. The mill heads are insured against 30"lO" 8500 11600 13100 breakage due to the high tensile strength of cast steel as 42"lO" 9800 1 18600 20500 compared to that of the cast iron head found on the ordinary 42"lO" 13400 21650 23850 rod mill. Denver Trunnion Bearings are made of high-grade 42"IO" 16900 25750 28200 nickel babbitt, dovetailed into the casting. Ball and socket 54"14" 20900 32400. 36000 harings can be furnished if desired. 54"14" 26500 37350 42000 Head and shell liners for Denver Steel Head Rod Mills 54"14" 32100 42500 47800 are available in Decolloy (a chrome-nickel allay), hard 60"16" 30000 50000 56300 iron, electric steel, molychrome steel, and manganese steel. 60"16" 38000 56000 62300 The heads have a conical shaped head liner construction, 60"16" 46000 62000 69500 both on the feed and d~schargeends, so that there is ample room for the feed from the trunnion helical conveyor discharge to enter the mill between the rods and head liners on the feed end of the mill. Drive gears are furnished either in cast tooth spur gear and pinion or cut tooth spur RODS, Denver Steel Grinding gear and pinion. The gears are furnished as standard on the discharge end of the mill, out of the way of the classifier THE Denver Equipment Com- return feed, but can be furnis ed at the mill feed end by pany is prepared to furnish all request. Drives may be obtainei according to the customer's types and sizes of steel rods specifications. as shown in table. Standard The following table clearly illustrates why Denver Steel sizes of these rods are finest Head Rod Mills have greater capacity than other mills. This quality, high carbon, hot is due to the fact that the diameters are measured inside the rolled, machine straightened liners, while other mills measure their diameter inside the steel and meet low cost, long shell. Desired information and recommendations will be wear requirements for use in gladly furnished upon writing to any Denver Equipment operation of all types-. of rod Company office. mills. Denver Steel Grinding Rods (Contrnued on next page) are made of a special steel Stmndlra 2,. pnmt Illoh Carbon which breaks up with Use Denver Ore Tests to verify or im- Steel Grlndlnp Radr twisting when final wear oc- prove your present flowsheet. (Contrnucd on next page) curs. This is extrenlely imporlanl in maintaining full 'I'hcse samplers are of all steel ct~nstructionand designed grinding capaclty and eliminating the difficulty of removing to provide maximum accuracy in the sampling of materials. wire-like, worn rods whieh twist and bend into an inscp- Both sirnnlcx and tandem units are very cornpacl, requiring arable and space filling mass of interlaced wires if breaking only an absolute minimum of headroom. does not occur. Rods are sh~ppedin lcngths cut to buil the More complete information can be obtained by writing length of each particular custonrer's rod mill. any Denver Equipment Company officc.

Dlsrncter ' Wt . Lbr Circurn Diamrtcr Wt . Lbn. Prr Linear Inches 1 PE~Lsncal frrcrzcc Inrhcr Fuol Ln'hca I Fwt

End End I.alh. - . ~.~ ..

74" Simldex 36" S~mplex 48" Sinlplex 24 ' Tandem 36" Tandem 48" Tandem

1 *Sarnrhr Size , Speed (No., Pan H P M SAMPLER, ORE, Denver (Snyder Type) Ourarde - ~ Dmrncler) NO. I N,>.7 1 i TIIE Dt,nvcr (Sny~1t.r Type) Pan I'A,, L W H ~ ~ ~-- , i5 O1y S:inlplcr av.~iliible in 24" Simp'ex br,th s I rlr p l c x and *tndern 36" Slrnpler ~111th.Ihc simplex unit is ior 48" Simolex 24" Tandcm tinal smpk. CUth ~)It.CIII~C,IS. I;~IIIP~ IIIOLL w1d~1.y ~~~~~~~ptdautc)- I.rjcc,l tIol~si,lss,and I~i~riz~inlnls11:1lt :III~kwr'ings. Shaft is dirri.r-mirlnwtcd through coupling to gearrnotu!-, thui rirdlic .(ifl~~pl~/..itn use Loday. cIrjr~,,gLlir srimplc~ pm~,,I. pxw ;lf a uniforlrl r;tlc of peed It cf~r~vsls a du~lstwl T;t,r~Iivir t,n,ts arc nl.,<, prriridcd rvrth il IIIIX~II~I~rrcI housi~~cwitlr~n u,lti~,tt i:lwr.ttrs which vrccivcs thcx lint rllt kind, after mirinc it tltol-wgh- ;i cylin(kr I~;~vlr,gIwr, ~r I?, discharges 11 through an- lll,>r<~5C,,,,~IS sw1,nvl l,> it. clther saml,lc pan, havinfi one TI\<, t.y1111 ;tr(> rrl- rnorc cutters. ,which cuts ll,:, dr~ving c,r it .l~ne,wquiriny only two steel an individu~~lc.lwtor dribrc. ,rlic C~I~III.,,III~~~I~~I~,~~~I~ is ur. wuud supports Lu place the s:unpl<.r in proper posili~nrto supportd in a welded st4 fr;ln~e;UI~ 111~. 11,,,~.,1r~~:I,,,.,,,, :, hoppcr at Ihc hol~omior rt.rcivi~lc~.pjrv.t, 1r<,r1i111,: sampl(.r. Tandm DCWN (Snyder TYWI Ote rt~(,ivc, thr lnat<,riili to tlc s.~~D~~.~ ~;~rn~~lcdSalnplcr L,cd may be 111 q~w~tion,the cvlrndt,r. m~dsr,vjrrs r,.v,,lvc, .Il1wly, csuain~: tlw .scoop-. I<) ;,rss undrr thr 111 ~11111,~ t,lken frmi Iht. il1~1l:argcr01 a <,MI tl,,. cllarsing llw ore I,, Ix. ;~n~plt,ii.'l'hc. wr ow chute. sarnplc as 1hc.y I>;ISS thl-or~glllhc '~~~LL:IIII(11 cir,. TtjC.s.II:~I,/,. ,cun,,n,,ed on next pale) (Cunu!nlcil urn nrxt lI.,y.. passes through the revolving element and then is conducted SAMPLER, ORE AND PULP, Deco Automatic by a pipe or chute to units which reduce or prepare the sample for testing or study. The rejects fall into the hopper from whence they are returned to the circuit. THE Deco Automatic Ore and This sampler can be furnished with a rotating disk feeder Pulp Sampler is designed to mounted on the same shaft, thus giving a uniform feed for operate suitable sample cut- ssmpling. Several disks and cutters can be mounted on the ters for the intermittent re- same rotating shaft, thereby simplifying the plant layout. moval of accurate samples Denver Equipment Company builds these samplers to han- from streams of wet or dry dle any practicable size of material and to cut almost any materials at predetermined size of sample desired. Recommendations and detailed infor- time intervals. The cutter is mation on Denver (Vezin Type) Ore Samplers will be gladly carried on a ball-bearing roller provided upon request. carriage assembly thus replacing the sliding contact found on old-style samplers. This SAMPLER, ORE, Denver-Snyder mechanism is located in proper Dero Automatic ore and PUID lat ti on ship to the stream- of %mrler material to be sarnoled the THE Denver-Snyder Sampler =---. --~- ope&tion of the-mechanism is one of the most simple and moves the cutter through the stream in a straight line and at efficient sampling machines a uniform speed. As it passes through the stream, the cutter ever devised. It consists of a is designed to deflect a representative portion of the stream circular casting, having one or into a suitable container. more openings (depending The drivine unit of the Deco Automatic Ore and Pulo upon the per cent sample de- - - - -. sired) in its sloping flange, Sampler is a gearmotor, operating only intermittently and and mounted on the end of a controlled by a time switch. A roller chain driven by a horizontal shaft. sprocket wheel mounted on the geannotor daft, is carried The ore to be sampled is di- over an idler sprocket wheel. This sprocket wheel runs upon rected by a spout so that it an axle supported by a pedestal bearing which also provides falls inside the flange of the for adiustable chain tension. sampler. The rejections slide The sample cutter, suspended from the carrier block, is Denver-Snyder Ore Sam~l~r.Note off the flange into a hopper moved back and forth by the engagement of an extended sturdy Construction while the samples fall through pin connecting two links of the chain with the disengaging the cutter. arms mounted on the carrier block. A large number of these samplers are in operation and in The direction of the cutter travel is reversed after each every instance they are giving satisfaction. succeeding sample cut, by means of the opposite Airections of travel the extended pin assumes in following the path of Max. S,.c Ovcrall Pulley - - Apprax Ship. the chain travel over the sprockets. ~~rdDimcnrron. S,zc Speed H.P. Wt.. Lbr. At the limits of the carrier travel energy to the motor is cut off by the opening of a limit 'switch and the carrier remains at rest until the circuit is restored by the time switch through the second limit switch at the opposite end of the rarrier travel. Standard cutter travel is 16" or 21" but is available up to 30" on size No. 1. Cutter travel on No. 2 (Heavy duty) is 36" and greater to meet your requirements.

We have often been referred to as the Dimensions I"cIudin. App'ox' ---cutter --Ship. Wt.. Lbs. "Diagnosticians of the ore dressing Height I Do-, Ex- industry." Perhaps we can help you L W H / Min. Max. mcsttc port with your mineral recovery problems. Please let us try. SCALE. Denver Platform THIS general purpose, ball- bearing, platform scale can be used for wheelbarrow and other bulk weighing of mn- centrates, reagents, mill sup- phes, and other materials. The Denver Platform Scale is a self-contained unit, fits into a shallow floor opening, and is easy to install. Th~sscale has a bronze ar- row-point beam which is mounted on a sturdy stand with self-aligning bearings. Both poises have set screws.

*Scale tPlatform Floor Opening Approximate Sire Dimensions Dimensions Shipping Wt. Lbs. Capacity -- ~- Pounds L W L W H Domestic Export - 1 1 pp

I SAMPLER, Denver Visual *Bcarna available to give capacities up to 10 000 pounds. tPlrtform dimensions ~ivelennth as parallel'to beam. DENVER Visual Samplers make possible immediate adjustment of concentration circuit to assure best recovery and grade of concentrates. Changes in grind, flotation time, reagznt application and cleaning or recleaning arrangements can be made and put into effect long before ordinary laboratory assay reports would indicate such changes as necessary. Denver Visual Sampler consists of a Denver-Wilfley Lab- oratory Concentrating Table with linoleum covered deck, and a 3/4" Denver Suction-Presswe Diaphragm Pump. (Rubber- INQUIRIES covered deck .for table is available.) Both table and pump are mounted on a structural steel base and both machines Your inquiries are solicited. Further de- are driven by V-belts from one only % horsewwer electric motor. A welded steel launder is provided for continuous tails, specifications and bulletins on any disposal of table concentrates and tailings. A 110 volt lamp items listed in this handbook will be sup- with flexible arm is provided for daylight tyw illumination over the deck. A Mineralight Lamp can also be attached far plied promptly. We will be most happy to use in detecting fluorescent minerals. Generally, a balance line is provided on the pump discharge which counteracts give you our recommendation on any prob- pumping ~ulsationsand ~rovidesan even feed to the table. lem without obligation. Our primary objec- This self-contained unit is manufactured in two sizes: No. 13-A.has concentrating table with deck of 40x18". tive is to help you by supplying sound infor- No. 13-B has cencentrating table with deck of 50x24". mation and proven mill equipment that will make more profit for you. Table Capacltv Dimensions ~eck Tons. Mnror Pump --Stre Sire 24 Hrr. HP Sm L WH 13-A 4O"xIB.. 2 1 G'' 5'9%" 21%'' 2E8" 13.B 50"x24" %-3 Y." 6'7%" 25%'' 28" SCALE, Denver (Portable) Platform SCALE, Denver Pulp Density THE all-steel Denver (Port- THE Denver Pulp Density able) Platform Scale, as illus- Scale provides a very fast and trated, is deal for weighing accurate means of determin- large samples and other prod- ing the specific gravity of ucts which require accurate pulps and liquids. It simplifies weighing in a mill or mill lab- the procedure of obtaining the oratory. This scale is also lea specific gravity of mill prod- widely used throughout in- ucts, thereby saving consider- dustrv to check weights of able time for the mill operator. . This scale is used wherever Ib materials received, materials metallurgical results depend I used in various batch treat- on the ratio of water to solids, such as in ball mill discharge, classifier overflow, thickener determining test results discharge, conditioner dis- The pulley cap and center charge, agitator circuit, etc. Denver (Portable) Platlorm Scala panel of the are made of alloy steel, pressed to shape Construction of the unit is as illustrated at left. The pulp and reinforced, making a very rigid and rust resisting unit. Scale The lever system is made heavy, with a large factor of safety, container is made of sDun and all bearings are self-aligning. The loow, bearines, nose aluminum and has an over- irons, and weights are rust resistant, assuring long life with flow slot near the top which permits easy, accurate filling sustained accuracy. The complete unit is mounted on wheels, to exactly one liter. In balanced position, with full pulp thus making it portable. container, the reading on the beam gives the specific gravity of the pulp directly. The percent solids is then obtained by applying this reading to the pulp density table which is furnished with each Denver Pulp Density Scale. To adapt this scale to higher specific gravity mediums it is only necessary to balance it with 1000 grams of water by adding weight at the end of the beam. When properly balanced, the Denver Pulp Density Scale then has a range from 1,000 to 3,300 grams. By utilizing this method of raising the scale range, the specific gravity of any pulp can be found.

*In the platform SIZ~above, the first figure is the dimension parallel with *capacity Approximate Shipping Weight, Lbs. ' Export the beam. Grams -- / ~alume. Domesic Exoort Cu. Ft.

2300 7 11 1 1.1 Reliable Denver Ore Tests insure your mining investment. 'Adjustable to 3300 grams or higher.

The Denver Equipment Company has specialized for Denver Equipment Company publishes many years in developing flotation processes and DECO TREFOIL. an exchange of help- manufacturing flotation equipment. Complete batch ful engineering information designed and continuous test laboratories-ire maintained for to improve milling. DECO TREFOIL is research on flotation applications. Submit your prob- published every other month. If you are lems to our experienced staff of Flotation Engineers connected with mining and do not re- . . . take advantage,- - now, of this test service. Writr ceive DECO TREFOIL please write to any one of the Deco offices. to US. (Continued from previous pagel ucts, both undersize and oversize; and a cone on th,? leed end. It can be furnished with any type of punched plate or screen cloth specified by the customer. The 48" and 60" method of maintaining proper screen tension is employed. the diameter Denver Trommel Screens are furnished with steel method depending on the wire diameter involved. Screen tire and roller drive. cloths are mounted on rubber covered camber bars, slightly These screens are well adapted for operation in series, arched for even distribution. with a range of screen openings to give graded products for Standard screens are furnished with suspension rod or use in stage treatment of ores. cable assemblies, or floor mounting brackets. Initial covering Let us make recommendations for your proposed trom- of standard steel screen cloth is included for separations me1 acreen installation or redesign your present flowsheet down to 20 mesh. Suspension frame, fine mesh wire, and for greater efficiencv throueh use of a trommel screen. dust enclosure are furnished at a slight additional cost. Motor driven units lnclude totally-enclosed, ball-bearing motors. The Denver-Dillon Vibrating Screen can be drlven from either side. The driven sheave is included on units furnished without the drive. The foIIowing table shows the many sizes available. St-md- ard screens listed below are available in single and double deck units. The triple and quadruple deck units consist of double deck units with an additional deck or decks flanged to the original deck. Please consult our experienced 1 staff of screening engineers for additional information and Capachies will *bra is for open circuit and based on I!.$'' to 12" slope. recommendations on your screening problems. incccase or decrease 2s a!ape 1s rnrreased or decruaed More complete information can be obtained by writing SCREEN, VIBRATING, Denver-Dillon any Denver Equipment Company office. DENVER-DILLON Vibrating Screen has rapidly come to Screcn Size . the front as a leader in the -- -- . sizing and dewatering of mm- L rated for w Export Ing and industrial products. -- Its almost unlimited uses vary 290 Irom the screening for size of 335 330 crusher products to the accu- 385 rate sizing ~f medicinal pel- 480 lets. The Denver-D~llon Vi- 455 brating Screen is abo used for 1175 1290 su,oenrion Denver.nillon vi. w~tsizing by operating the 1570 bratin. screan-nal,m nack sere:-n on an uphill slore, the 1920 1790 lower end being under the 2110 surface of the liquid. 3170 3290 The main feature of the Denver-Dillon V~bratingScreen '620 is the patented mechanism. In operation, the screen shah 4055 rotates on TWO eceentrically .mounted bearings, and this 3875 eccentric motion is transmitted into the screen,body, causing 1355 a true circular throw motion, the radius of whlch is equlva- a deck screens, less drive. moun, lent to the radius of eccentricity on the eccentric portlon of the shalt. The simplicity of this construction allows the screen to be manufactured with a light weight but sturdy mechanism which is low in initial cost, low in maintenance Denver Ore Tests are made on an and power costs, and vet has a high, positive capacity. The Denver-Dillon Vibraling Screen is available in single "actual cost" basis. This brings the and multiple deck, units for floor mounting or suspenslun. world's finest laboratory equipment The side panels are equipped with flanges containing pre- and skilled technicians to your service cision punched bolt holes so that an additional deck may br added in the future by merely bolting the new deck either crt a very low cost. on the top or the bottom of the original deck. The advantage of this feature is that added capacity is gained without qur- chasing a separate mechanism, since the mechan~smsor@ nally furnished are designed for this feature. A positive SKIP. Denver Ore and Water m Guides are made of heavv~~ ~ A channels, flared on the ends. 1 I THE Denver Ore and Water I&\ and solidly riveted to the carrier and headframe. Head- frame yoke and safety dogs are of carbon cast steel. The lifting eyebolt is made of forged steel while the safety mechanism is the widelv used. extra heavv duty type -safeti dogs are of ample size and so shaped to make ~t impossible lor them to turn over and not grip the gudes, as they are cperated by a heavy elliptical acrois beneath the car. The sprlng illustration above shows the style "B" skip without a top Dumping rails can be sup- or upper side. Denver Ore and Water Skips are also avail- plied for elther the Style No. able with riveted steel tops. The table below includes only Standard Denver Sall.Dumoing Ski0 Or the No' Denver data on units having steel tops but additional information or ~~ekrt-SIYI~NO. I-suilable for Self-Dumping Skip or Bucket. on units without tops will gladly be furnished upon request. Mart Operating Conditions These dumping rails are made When ordering specify whether for ore or water, capacity of rolled steel angles. They desired weight df one cubic foot of material to be handled, are welded to heavy sideplatea track iauge, angle of incline of shaft, and any limiting and so designed to permit the dimensions. skip or bucket to hang in- 1 I verted on the frame after Capacity. Steelwork Approximate 'Machine / Lbs. dumping has occurred. Two Sire Cu. Ft. Thickness --Shipping Wt.. guide horns, riveted to the !" 550 sides of the skip or bucket, 800 1050 guide it into the dumping rail 1300 which in turn reverses the 1600 unit while it is being lowered. Approximate shipping weight *Data on unlrs equipped wth steel tops only -- of dumping rails is three hundred pounds per pair. ewer Self-OumPina Skir or Buckst SKIP OR BUCKET, Denver Self-Dumping With Ournplng Iron Shorn at Right ~h,importance of reliability and experience in building the DENVER Self-Dumping Skip type of equipment used in the or Bucket is heavily built to mining and milling industry cannot be over-emphasized. withstand the wear and tear Requirements are very exacting. It is not only the cost of of loading, rapid hoisting, and the equipment and the realization that the remote places where this equipment is often used makes replacements and strains incident to dumping. repairs very difficult to obtain, but also the importance of Two styles are available. provlding maximum safety protection for the human lives Style No. 1 is the standard at stake. type and Style No. 2 is the heavy duty type with hinged hood. The standard type will satisly most operating conditions, but for extremely dai- cult operating conditions and heavy loading the heavy duty type is pteferable. The standard type ore NOTE: Due to the large number of variable dimensions. the Denver Self- Dum mg Skip or Bucket is made only on order and in accordance with bucket or skip is of the self- vecA rqulrcments. dumping type, 'constructed of ,:," boilcr plate, and heavily reinforced with iron bands. SPEED REDUCER, Denver Integral Lift Vertical Speed Gear Input Horaepowcr Retinas et Vsrious Worm Gear Reducer Ratio Worm Shaft R.P.M. SII~ THE Denver Integral Lift 100 200 300 580 720 870 !I150 ----____I___- __ Vertical Worm Gear Speed No 8 55/1 93 22 Reducer is used on Denver 32 :: 56 Center and Side Air-lift Agi- -2:: :: 2: :: 91 100 113 I36 No 15 6011 4 8 10 1 14 4 16 0 17 3 19 3 21 5 tators, Denver Hydroclassi- No. 18 6011 7 9 12 6 16 1 fiers, and on thickeners in 21 9 24 4 26 7 29 3 32 4 many mills and industrial plants where it is necessary to have a simple, compact. Speed Thermal *WDU~ totally - enclosed, self - lubri- Rcducer Gcer Ratmg Torque cated reduction unit. This unit Sirc Ratio H.P. Inch-Lbs. is widely used to step down speeds of high-speed motors No. 8 23600 No. 10 42300 to the slow sged required by No. 12 69500 many ore dressing and indus- NO.15 132000 Several Sim of Total1~-Endawd No. 18 209000 mnver lntanrvl Lift Vertical Worm trial machines. It has ~articu- Gear Soeed Reducers lar a~olicationon mechanisms wherc.'a positive lifting device 'Output torque ratings given are for 100 R.P.M. worm speed-use these ratings for all worm speeds below LOO R.P.M.. For output torque at other is necessary to prevent the stirring arm, or rakes, from stick- Input H.P. X 63000 ing due to rapid settling of solids during power interruptions speeds use: T=---- or ove~loadj. Other uses are for metal skimming, mixing, Output Shaft R.P.M. XEfficiency' blending, dlsolving, emulsifying, sa~onif~~ng,sulphonating, cauhcising. washing, scrubbing, and many other uses. A high-grade bronze is used in the machined, cut-tooth, worm gear and the worm and worm shaft are machmed from an allov steel shaft-hardened, ground, and polished. The worm rci.,ied on the top of the gear case. Oversize tapered roller k~ringsassume vertical loads, while ball bearings on the No. 12 2500 .wo!-r~?shaft take thrust loads in either direction as well as No. 15 i.~,!j::I loads. Ample use of leather oil seals prevents oil :c;:iazes and protects the bearings from dirt. All ,parts are :,jc;clsion machined to close tolerances, and wearmg parts ;re generously lubricated to give long wearing life and ;rccdom from repairs. This is important in helping to keep TABLE, Deister Plat-0 Concentrating coats low in olants where several units may be used on various machines. THE Deister Plat-0 Concen- The horsepower ratings given in the table below are for trating Table exemplifies sim- service with 8 to 10 hours duty, and free from recurrent ple, low cost, high quality shock loads. For service with 8 to 10 hours duty where equipment for the separation recurrent shock loads occur or 24 hour service where no ar.d recovery of the free min- shock loading is experienced, the horsepower ratings must eral in ores containing gold, be reduced by dividing by 1.2. For service with 24-hour silver, platinum, copper, tin, shock load duty, the horsepower ratings must be reduced lead, zinc, iron and other min- by dividing by 1.33. For operation requiring intermittent service where the maximpm cycle of operation calls for not more than 15 minutes running in a two-hour period, the The metallurgical superior- horsepower ratings may be divided by 0.7. In no case must ity claimed for this unit over others in the concentration the thermal rating he exceeded. and recovery of minerals is due to three important and exclusive features: (1) patented plateau systems; (2) patented (Continued on ncrt page) riffling systems; and (3) patented self-oiling head motion for maximum efficiency and low power requirements.