r Zfí **ootóo n

REPORT NO. 1894 LIST OF UNRESTRICTED NIM PUBLICATIONS ISSUED FROM 1966 TO 1977

H.W. Glen

30th June, 1977

NATIONAL INSTITUTE for METALLURGY 200 HÊM Sbydom totnut RANOBURQ 2104 8outh Afrtct

-atmmti 1U

NATIONAL INSTITUTE FOR METALLURGY

Report No. 1894 LIST OF UNRESTRICTED NIM PUBLICATIONS ISSUED FROM 1966 TO 1977

30th June. 1977

Investigator: H.W. Glen

ISBN 0 86999 380 1 PREFACE

This report, which supersedes Report 1812. is a compilation of all the publications of the National Institute for Metallurgy (NIM) having an unrestricted distribution list. It includes all the unrestricted reports and the patents issued and registered by NIM from I96r> to 1st April. 1977. the confidential reports that were declassified during that period, and all the papers published during that period where one of the authors was. or is. a member of NIM staff. The total number of unrestricted reports included is f>32. the patents amount to 17. and the number of papers published is 232. Nl\1"s research work is divided into research programmes, and. for ease of reference, all the reports, papers, and patents listed here have been classified as far as possible into the various NIVi research programmes. \ list of these research programmes is given in Section I. SYNOPSIS

This puhlii-.it!> n lists the f>32 unrestricted reports. 232 papers, and 17 patents published by the National Ir.stiti • i. r Metallurgy from I96f> (the year of its inception) to 1st April. 1977. For ease of reference. iiie- publications are also classified under the research programmes that gave rise to them.

SAMEVATTING

Hierdic puM.kasie iysdie 632 onbeperkte verslae, 232 referate en 17 patente wat die Nasionale Instirjut vr M tallurgie vanaf 1966 (sy stigtingsjaar) tot 1 April 1977 uitgegee het. Hierdie puhiikasi • *."-•;! vir maklike verwysing ook onder die navorsingsprogramme wat tot hulle aanlciding cecee i:ei, "..-Hnssifiseer. r --í

CONTENTS

PREFACE

1 COMPREHENSIVE LIST OF RESEARCH PROGRAMMES A. NIM Programmes I B. Programmes on L'ranium Involving NIM Staff 4

2 LIST OF UNRESTRICTED NIM REPORTS s

.V PAPERS BY NIM STAFF 37

4. NIM PATENTS 52

5 CLASSIFICATION OF NIM PUBLICATIONS ACCORDING TO PROGRAMME . SJ

4 r ~i

1. COMPREHENSIVE LIST OF RESEARCH PROGRAMMES MM Pl'Bl NATIONS

A. NIM PROGRAMMES

Ferro-alloys, stainless steels, iron and steel, and related fields

001 Fundamental metallurgical studies of ferro-alloy processes and the application of results to operating plants

002 Development of new and improved ferro-alloy processes for the major ferro-alloys (ferrochromium, ferromanganese, ferrosilicon)

003 Instrumentation, optimization, and control of ferro-alloy processes

004 Research and development o'. stainless-steel processes

005 Research associated with conventional processes for the production of iron and steel

006 Research and development of processes for minor ferro-alloys

007 Direct reduction processes for iron ores

008 Properties of carbonaceous reducing agents with special reference to ferro-alloy processes

009 Development of processes for the production of chromium metal and chemicals

010 Development of processes for the production of manganese metal

011 Development of processes for the production of silicon metal

Base metals (copper, nickel, zinc, lead, cobalt, cadmium)

050 Development of processes for the concentration of base metals, especially copper, zinc, lead, and nickel, by ore-dressing techniques with special reference to mixed sulphides

051 Development of hydrometallurgical processes for base metals, especially copper, nickel, and cobalt, including non-sulphidic raw materials

052 Pyrometallurgical processes for the production and refining of lead and zinc

053 Pyrometallurgical processes for the smelting and refining of copper and nickel

054 Instrumentation, optimization, and control of processes for the recovery of base metals

055 Development of hydrometallurgical processes for the recovery of zinc

056 Processing ?f nickel-bearing serpentinites with special reference to their occurrence in South Africa

057 Development of new and improved methods for the analysis of base-metal sulphide ores, concentrates, metals, and byproducts

058 Mineralogical studies of base-metal sulphides from the north-western Cape

Gold and silver

100 Development of improved ore-dressing processes for the recovery of gold and pyrite from Witwatersrand and O.F.S. gold mines

101 Development of improved hydrometallurgical extraction processes for gold from Witwatersrand and O.F.S. gold mines

i MM PUBLICATIONS

102 Instrumentation, optimization, and control of processes for the recovery of gold

103 Mineralogical and geochemical studies of gold ores

104 Recovery of gold from refractory ores

105 Refining processes for gold and silver

Platinum-group metals and other associated metals

150 Research and development of new processes for the refining of platinum-group metals

151 Research and development of new processes for the treatment of anode sludges from copper refineries

152 Research and development of improved ore-dressing and smelting processes for the recovery of platinum-group metals and chromite from ores, including ores of the Merensky and Chromite Reefs

153 Development of new and improved methixis for the analysis of platinum-group metals in ores, concentrates, mattes, and pure metals

154 Mineralogical studies of platinum-group metals and chromile-containing reefs in the Bushvcld Igneous Complex

Base minerals

200 Development of improved processes for the recovery of phosphates and phosphorus chemicals

201 Development of improved processes for the recovery of fluorspar

202 Investigation of processes for the production of alumina and aluminium from local ra» materials

203 Investigation of processes for the production of aluminous refractories, with special reference to sillimi'nitc and andalusitc

204 Processes for the production of magnesite and magnesium oxide

205 Processes for the production of limestone and lime

206 Processes for the production of sodium chemicals leg., salt, soda ash)

207 Processes for the production of potassium chemicals

208 Recovery and processing of asbestos

Miscellaneous minerals and metals

250 Processing of pegmatites for the recovery of niobium, tantalum, spodumenc. mica, bervl. etc.

251 Recovery of ilmenitc. rulilc. zircon, and other minerals from beach-sand ;ind similar deposits

252 Recovery of tungsten concentrates from ores, anil the development of processes lor the refining of tungsten

253 Processes for the upgrading of manganese ores and for the production of manganese dioxide and manganese chemicals MM PlBl.IC ATIONS

254 Production and refining of magnesium metal and magnesium-metal alloys 255 Research and development for the production and use of zirconium and its alloys in non-nuclear fields

256 Recovery of iron, titanium dioxide, and vanadium from iron ores containing titanium and vanadium 257 Production and refining of titanium metal and its alloys

25H Recovery of tin concentiates from ores, and refining of tin

259 Processes for the production and refining of niobium and tantalum metal and their alloys

260 Recovery and refining of the rare-earth minerals and metals

2M Recover; and refining of antimony

262 Development of new and improved methtxls for the analysis of silicate-containing ores and concentrates Research and development of equipment, processes, reagents, and research techniques

500 General physicochemical study of flotation and flocculation. and the development of reagents for these processes

501 General physicochemical study of hydrometallurgy

502 Research and development of equipment for ore-dressing processes, and new concepts in ore-dressing (excluding flotation and comminution)

503 Fundamental investigations of the simulation, optimization, and control of extractive-metallurgical processes and computation techniques

504 Research and development of analytical techniques and methods for extractive metallurgy

505 Preparation of international and secondary reference materials for extractive metallurgy

506 Development of mincralogical techniques and methods for extractive metallurgy

507 Development of nuclear-activation techniques as methods for the analysis of minerals and metals

508 Research and development of equipment for hydrometallurgical and electrometallurgical processes

509 Research and development of equipment for pyromctallurgica) processes

510 Research and development of instruments and associated equipment for the measurement and control of extractive-metallurgical processes

511 General studies of electrochemistry in extractive metallurgy

512 Engineering studies of the flotation process and equipment, including modelling, scale-up. optimization, and control

513 Development of solvent-extraction, ion-exchange, and other reagents for hydromctallurgy

514 General chemical studies of high-temperature processes in extractive metallurgy

515 Engineering studies of comminution and of associated classification processes and equipment, including modelling, scale-up. optimization, and control

< MM 1*1 Rl K" ATIONS

Processing and properties of metals

MM) Selection of materials and op'imization for extractive-metallurgical processes

M)l Further processing of metals with special reference to end-usage and properties that are

particularly suited to local raw materials

Miscellaneous

"•MO Miscellaneous economic, cost, and commodity studies

W><) Minerals manpower, training, and recruitment

WH Visits (local and overseas) and attendance at conferences, symposia, etc.

W> Miscellaneous unallocatahlc projects

B. PROGRAMMES ON URANIUM INVOLVING NIM STAFF

The work done by the Extraction Metallurgy Division of the Atomic Energy Board with the assistance of NIM staff is classified under the following headings:

Beneficiation of ores for the recovery of uranium

Fundamental studies on the leaching of uranium ores

Instrumentation for uranium plants

Methods for the determination of haddeleyite. zirconium compounds, and nuclear-grade zirconium metal

Methods for the determination of trace impurities in uranium compounds

Methods for the determination of uranium and thorium

Mincralogical studies of uranium minerals

Processes for the recovery of uranium NIM PI hi k ATIONS

2. LIST OF UNRESTRICTED NIM REPORTS

Copies of most of these reports are available free of charge from The Chief Librarian. National Institute for Metallurgy, Private Bag X3015. Randburg, 2125 South Africa. For those reports that are out of print, photocopies can be supplied at a nominal charge. ^ ^ — mmmm mr ~l MM PIBI ICATIONS

Report Title Year

~ The dissolution of gold in cyanide solutions containing copper in a

carbonate/bicarbonate medium. Preliminary results 1966

5 The spectrophotometry determination of trace amounts of tin 1966

X Mineralogy and chemical behaviour of some refractory gold ores from the

Barberton Mountain Land 1966

I" The determination of phosphate in silicate samples 1966

11 Gravimetric determination of carbon dioxide in cyanide solutions 1966

1- Exploratory tests on the concentration of tin ore from Kuils River. C.P. 1966

I 4 A comparison of the effects of additions of carbonate/bicarbonate as opposed

to additions of lime in the leaching of a Blyvooruitzicht gold ore 1966

lft The rotating-disc system and its applications in the dissolution of gold 1966

IN The 8th Commonwealth Mining and Metallurgical Congress - Australasia - 27th February to 15th April. 1965. Visits to various places in Australia and i Tasmania 1966 -" The determination of small amounts of gold in barren cyanide solution by

atomic-absorption spectrophotometry 1966

-I The use of heavy-medium separation for the recovery of podumene 1966

-•* Determination of gold in barren cyanide solutions by atomic-absorption spectrophotometry 1966 -5 Quantitative mineraiogical examination of six samples of pulverized mine ores submitted by the Chemical Engineering Group. C.S.I.R. 1966 -ft Economic evaluations of the possible production of alumina from Sasol ashes by the ammonium sulphate baking process and the ammonium fluoride and sulph'iric acid leaching process 1967 -7 Spectrophotometry- determination of gold in cyanide solutions after solvent extraction as the bromo-auratc complex 1966

-N Exploratory tests on the dissolution of manganese dioxide by reaction with

sulphuric acid and a metallic sulphide 1966

29 The determination of selenium and 'ellurium in silver chloride 1966

•'"' The extraction of alumina from Sasol coal ash 1966

}•* Qualitative electron-microprobe investigation of cobalt-gadolinium intcrmetallic compounds 1966 3Í The determination of gold in ores and solutions by nei'tron-activation analysis 1966 NIM PUBLICATIONS

37 The determination of aluminium in silicate samples by complexometric titration 1966

3K Chemical treatment of refractory gold ores. Literature survey 1966

39 The determination of small amounts of silica in zirconium ores and concentrates 1966

40 The spectrophotometry determination of tin in silicate materials 1966

41 Table of the isomeric states of stable nuclides 1966

42 The redox potential of solutions of potassium ethyl xanthate 1966

43 The effect of oxygen on the stability of solutions of potassium ethyl xanthate 1966

44 The zero point of charge of uranium dioxide and uraninite 1966

45 An apparatus used in the study of interactions between sulphide minerals, sulphydryl reagents and oxygen 1966

4K The investigation of a suspected sillimanite-bearing sample 1966

49 The spectrophotometric determination of silica in zirconium oxide 1966

51 Exploratory tests on the recovery of diaspore from a ferroginous shale from the Gamagararand 1966 53 Differential thermal investigation of Moore-filter residues for the Anglo American Research Laboratory 1966

54 Electron-microprobe investigation of magnetite from the Bushveld Igneous Complex 1966

63 X-ray and spectrographs analyses of seven samples of manganese ore 1966

64 The determination of the hafnium/zirconium ratio in ammonium diuranate produced by the Bufflex process 1966

65 Samples of manganese dioxide for battery tests by the C.S.I.R. 1966

66 The study of propagation modes effective in around-the-World radio-wave propagation in the 15-Mc/s to 30-Mc/s band 1966

67 The application of silicon controlled rectifiers to instruments using half-cycle

heating 1966

69 Preliminary examination of ijolite from Spitzkop 1966

76 The electron-microprobe investigation of a gold concentrate from the Louis Moore Mine 1966 77 Concentration of fluorspar from the farm Strydfontein. Marico District. Preliminary investigation 1966 MM PUBLICATIONS

78 X-ray investigation of four samples of manganese ore 1966

71* Investigation into the improvement of gold recovery in the cyanidation circuit of the Louis Moore gold mine 1966

80 The resolution of photopeaks obtained from the products of stable nuclides irradiated by neutrons 1966

81 The solvent extraction of copper cyanide 1966

82 The spectrophotometry determination of cobalt with 2-nitroso-l-naphthoi 1966

83 Qualitative X-ray examination of two samples of MnCV. ore 1966

84 Leaching tests on the copper sulphide mineral valleriite from Palabora Mining Company - a preliminary report 1966

85 The roasting of refractory gold ores and concentrates. Literature survey 1966

86 The investigation of six samples of serpentinite from the Barberton area 1966

88 Quantitative electron-microprobe investigation of the distribution of nickel in serpentinites and associated minerals and rocks from the Barberton area 1966

89 Mineralogical examination of ijolite from Spitzkop 1966

90 Mineralogical examination of schist sample from the Giart Reefs Mine 1966

91 Half-cycle heating applied to an X-ray powder camera 1966

96 The mode of occurrence of beryl in grey gneiss along the contact with the Gesie pegmatite 1966

97 X-ray diffraction analysis ot six samples of manganese ore from Graskop, eastern Transvaal 1966

98 Qualitative X-ray analysis of manganese dioxide ore from Graskop 1966

99 Determination of molybdenum in uranium compounds 1966

101 Electron-microprobe identification of opaque minerals in gold ore from the Basal Reef. Free State Geduld Mine 1966

102 Micas of the Noumas pegmatite 1966

103 Techniques for the examination of inorganic compounds on an infrared spectrograph 1966

104 The infrared examination of microlite. muscovite. apatite in the presence of carbonate, asbestos, paragonite. and various uranium salts 1967

105 Report on overseas visit 1966 MM Pl'BLICATIONS

I "7 Investigations on the treatment of refractory gold ores from the Giant Reefs Mine 1966

H'N An X-ray-diffraction method for the quantitative determination of nsutite

(y-MnO-..) and cryptomelane (u-MnO:) in ores from the Gopani Mine. Transvaal I %6

H>9 The possibility of establishing a local cost index for the estimation of metallurgical and chemical plant 1967

111 The X-ray investigation of a sample of upgraded material from the Graskop wad deposit 1966

113 The identification, by means of the electron mieroprobe, of an opaque mineral

from the Artonvilla Mine. Messina 1966

1 20 Exploratory tests on the recovery of apatite and magnetite from the farm Schiel 1967

127 Comments on the size of gold particles observed in polished sections of ore from the Giant Reefs Mine 1967 128 Exploratory concentration test for the recovery of cassiterite from Sandspruit No. 51. Bronkhorstspruit district 1967

129 The polarographic determination of total hexavalent uranium as uranyl fluoride in uranous fluoride 1967

131 The spectrographs determination of titanium oxide, ferric oxide, and silica, in baddeleyite 1967

132 Mineralogical and spectrographs investigation of a mineral concentrate from Koster. western Transvaal 1967

131 Gold recovery by cyanidation from mill products obtained after pyrite flotation. Progress made up to 1st July. 1967 1967

136 Determination of aluminium in silicate materials by solvent extraction and atomic-absorption spectrophotometry 1967

137 Determination of aluminium by atomic-absorption spectrophotometry with

the nitrous oxide and acetylene flame 1966

138 The determination of beryllium by atomic-absorption spectrophotometry 1967

139 A preliminary survey of gold-recovery problems arising in the production of pyrite 1967 14" A preliminary mineralogical investigation of pyritc from the Kimberley and the Main Reefs. Vogelstruisbult Gold Mine 1967

142 Micas from the Namaqualand pegmatite area 1966

143 A review of the investigations into the possibility of producing alumina and aluminium from South African ores 1967 SiM PlHi ICATIONS

I -*x The recovery of gold from the Fairview- dump after pretreatment with

sulphurous acid 1967

I**1* The extraction of alumina, potash, and soda from a nepheline concentrate 19t>7

151 The spectrophotometry determination of minor amounts of antimony 1967

I?- The determination of beryllium by irradiation with gamma rays |9f>7

153 The spectrographs determination of zirconium in uranium oxide 1967

I -s4 The leaching of various copper minerals with dilute sodium cyanide and dilute solutions containing sulphuric acid and ferric ions 1967 1?5 The quantitative estimation of valleriite in the presence of other copper minerals 1967

156 Preliminary observations on the automation of the TBP method for determining uranium 1967

157 Results of tests to obtain pure valleriite 1967

15S Aerosol formation with a high-speed spinning surface 1967

159 A radioactive-tracer technique for the study of the flotation of valleriite 1967

I Ml The determination of copper in rocks and ores by atomic-absorption spectrophotometry 1967

If>l The quantitative eleetron-microprohe determination of the magnesium content of magnetite from Phalaborwa 1967

'^2 The growth of radioactivity in uranium after separation from its daughter

products 1967

163 The fluorimetric determination of uranium 1967

I«5 Gold recovery from p_.rite flotation mill products by cyanidation. Progress

made up to 1st May. 1967 1967

167 The determination of thiocyanatc in uranium solutions 1967

172 The solvent extraction of copper cyanide 1967 1^3 The determination of beryllium by atomic-absorption spectrophotometry 1967

174 Determination of chloride in uranium solutions 1967

175 Copper extraction b> leaching magnetites from Palabora Mining Company 1967

177 Compensating for flux variation in neutron-activation analysis 1967

179 The nickel distribution in weathered serpentinites from Volspruit. Potgietersrus 1967

in MM PUBLICATIONS

180 The distribution of nickel in a rock sample from the Louis Moore Mine.

northern Transvaal 1967

19(1 Micas from the Namaqualand pegmatite area 1967

19? An investigation into the use of platinum ware for silicate analysis 1967

?00 The spectrochemical analysis of silicate material by a plasma-jet source 1967

"*07 The analysis of baddeteyite by X-ray-fluorescene spectroscopy 1967

208 Determination of fluorine in fluorspar ores by neutron-activation analysis 1967 211 Refractory gold ores. Report on investigations into roasting of gold concentrates in the Edwards roaster of the Fairview and the New Consort reduction plants 1967

216 The determination of minor quantities of manganese in silicate materials 1967

218 Exploratory comminution and flotation tests to indicate some characteristics of valleriite 1967

219 A review of some of the mineralogical factors influencing the flotation of pyrite 1967

225 Test to recover tantalite-columbite from a bulk sample of tailing from the Noumas pegmatite by pneumatic tabling 1967

232 A comparison of open-circuit and closed-circuit grinding for the control of slime formation 1967

233 A chemical and mineralogical study of microlite from the Noumas pegmatite. (Available only on loan from NIM Library) 1967

236 The determination of some of the major constituents of ores and minerals by fast-neutron activation analysis 1967

237 The mineralogy »f uranium in Western Areas ores 1967

241 Investigation of the effects of sulphydryl flotation reagents on the cyanidation of native gold 1967

244 The determination of selenium and tellurium in silver chloride and uranium

compounds 1967

256 The determination of carbon in uranium tetrafluoride 1967

257 The determination of uranium by the TBP method 1967 258 Exploratory concentration tests by Warren Spring Laboratory on the use of the fluidized-bed concentrator for the recovery of spodumene 1967

260 The electron-microprobe investigation of two samples of magnetite catalyst from Sasol 1967 MM HI HI It A I KINS

-h- Preliminary gravity concentration tests for the recovery of scheelite. wolframite, and cassiterite from the tailing du-.ip at Boksputs in the Gordonia district 1967

1W A new detector unit for the Techtron model AA3 atomic-absorption spectrophotometer 1967

-h? The spectiophouvmetTic determination of minor quantities oï chromrun. in >ilicate materials 1967

266 Concentration tests for the recovery of lepidolite from taiiing dumps at I '.elicon

and Rubicon Mines by electrostatic separation and flotation 1968

268 ,.\ power-failure safetv device and operational aid for the electron microprobe | 968

- f>9 A literature survey of the vertical distribution of gold and uranium in various auriferous reefs 10,68 ^72 The determination of iron, titanium, and zirconium, in baddeleyite by X-ray-fluorescence spectroscopy 1968

-76 The determination of vanadium in silicate materials by atomic-absorption

spectrophotometry 1968

-77 The determination of small quantities of xanthate in cyanide solution 1968

278 Gold recovery by cyanidation from mill products ob ained after pyrite flotation 1 968

-SI The determination of xanthatc in cyanide solutions 1968

-N6 A mtneralogical and netrogruphic study of the prc-Transvaal rocks in borehole

K.I. Koster district, western Transvaal 1968

-N7 A preliminary examination of kieselguhr from Witdraai. south of Postmasburg 1968

2KS Ramsdellite (MnO.) from the Hotazel Mine, northern Cape Province 1968 289 The determination of lead in s'iicate materials by atomic-absorption

spectrophotometry 1968

-91 Nickel minerals from Barberton. South Africa. I. Ferroan trevoritc 1968

-W The recovery of potassium from phlogupite 1968 W The mixed-collector system xanthate plus quaternary ammonium halidc. A literalu e survey 1968 W2 Mineralogical examination of phosphate in pyroxenite from St. Agncsfontein, north-western Transvaal 1968

.106 Tnc effect of prcaeration on two samples of thickener underflow from the Vcnterspost Gold Mine 1968 ~i r MM PUBLICATIONS

307 Preliminary examination of kyanite-bearing material from Granville. Leydsdorp 1968

308 A mineralogicat study of gold particles in pulp residues from the Bracken Gold Mine 1968

312 An investigation of the influence of alkyl trimethyl ammonium halides on the stability of potassium ethyl xanthate in aqueous solution 1968

313 The qualitative investigation of inclusions in free-cutting steel with the electron microprobe 1968

316 The flotation of pyrite from siliceous gangue by cationic collectors. A literature survev 1968

317 Results of tests carried out at the Loraine Gold Mine during tht- period 5th to 7th February. 1968 1968

321 Aeration of ore from the Loraine Gold Mine before the addition of cyanide 1968

323 The colorimetric determination of cyanide in solutions from gold cyanidation

plants ' 1968

325 Investigation for nickel and precious metals in samples from Malelanc 1968

327 Information theory and the design of experiments 1968 328 A mineralogical examination of iron ore from Nooitgedacht. near Airlie Station, eastern Transvaal 1968

331 A literature survey of the preparation of standard rock samples 1968

332 Collection and preparation of standard rock samples 1968

333 The hot-water leaching process for refining arsenious oxide in flue dusts from the Fairview Mine 1968

340 The detection of the formation of a bulk adduct between potassium ethyl xanthate and dodecyl trimethyl ammonium bromide in aqueous solution 1968

341 An experimental on-stream colorimetric uranium monitor and solvent-addition controller for the Purlex process 1968

343 A mineralogical investigation of gold-bearing sulphidic ore from the Florence-Devonian Mine. Barberton 1968

344 Nickel minerals from Barberton: II. Nimite. a nickelian chlorite 1968

347 Concentration tests on rich blue nobby' kyanite-bearing ore from Nkandhla. Zululand 1968

348 The determination of gold and silver in pyrite and banket by atomic-absorption spectrophotometry 1968 L J MM PI HI ICATIONS

349 The reparation of platinum from solution after fusion with potassium bif! joridc 1968

3:>0 Concentration of cassiterite from two samples from Enkeldoorn.

Bronkhorstspruit district 1968

352 Nickel minerals from Barberton: III. Willemseite. a nickelian talc I96S

3?4 The determination of trace amounts of arsenic in uranium tetrafluoride 196S 35s The determination of mercury at concentrations of parts per thousand million in geological samples |9f»8

359 The separation and determination of calcium and magnesium in silicate material 1968

360 The determination of the alkali metal carbonates and hydroxides or carbonates and bicarbonates in the presence of permanganate ions 1968

361 The spectrophotometries determination of small amounts ot calcium and magnesium in glass sands and allied materials 1968

3b2 The determination of cobalt in geological samples by atomic-absorption spectrophotometry 1968

363 The determination of thorium in solid samples of haddclevite and carhonatite ores and in the solutions resulting from leaching these ores 1968

367 Felix Project: imperfect mixing in continuous leaching at Buffelsfontein uranium plant I96S

371 A preliminary investigation of cyanide-sulphydryl mixed-ligand complexes of

mercuric ion l9f>X

377 Examination of pulp samples, treated with cyanide, for coated gold 1968

378 A literature survey on the manufacture of ferrochrome 1968

379 The inhibition of the rate of cyanidation of native gold by Aeromine 3037 |968

380 Preparation of gold ore before cyanidation 1968 385 The determination of the nature of coatings on gold particles |968

392 The spectrophotometry determination of small amounts of calcium and magnesium in glass sands and allied materials 1968

414 The geochemistry of some uranium minerals in the Dominion Reef anil Witwatersrand Systems 1968

415 Uranium compounds in the Dominion Reefs, and their association with phosphorus compounds 1968

416 Comminution kinetics: batch tests in small mills, and model development 1968 MM PUBLICATIONS

417 Determination of molybdenum in uranium compounds 1968

428 Nickel minerals from Barberton. South Africa: IV. Reevesite. a member of the hydrotalcite group 1968

429 The determination of chromium in -hromite 1968

430 A mineralogica! investigation of pyrite from the Lorainc Gold Mine. Orange Free State " 1968

433 The spectrophotometric determination of microgram quantities of vanadium in

U,Os. lJO:1. and UF, " 1968

434 The determination of titanium in uranium compounds 1968

43> The liquid-liquid extraction of ferric thiocyanate complexes with Versatic 911 1968 437 The bathochromic shift of the 381 nm absorption peak in aqueous solutions of potassium ethyl xanthate containing dodecyltrimcthyl ammonium bromide 1968

439 The determination of free acid in the presence of hydrolysable cations 1968

440 Separation of hafnium and zirconium oxides from uranium preliminary to the spectrographic determination of hafnium 1968

442 n Ondersoek na die gebruik van die Hallimondbuis vir die kwantitatiewe bestudering van flottasieverskynsels met besondere verwysing na die kondisionering van apalict en kalsiet 1968

443 The determination of anionic surface-active agents in dilute aqueous solution 1968

445 The use of californium-252 fission neutron sources 1969

447 Chemical beneficiation and agglomeration of low-grade chromite ores - a

literature study 1969

44l> The determination of cationic surface-active agents in dilute aqueous solution | "68

45N The spectrograph*»: determination of alkali metals and alkaline earths in uranium oxide 1968 451 The determination of thorium in baddeleyite and carbonatite ores and in the solutions resulting from leaching of these ores 1968

452 The Purlex process - a description of the pilot plant leading to the use of the process in South Africa 1969

455 Determination of uranium by the TBP method after extraction with ethyl acetate 1968

456 Method for the determination of vanadium in silicate materials by atomic-absorption spectrophotometry 1969 NIM PUBLICATIONS

4>7 The determination of rubidium and caesium in silicate materials by atomic-absorption spectrophotometry 1«69

4-",9 Determination of tantalum in rocks and minerals by paper-partition chromatography 1969

460 A rapid method for the determination of minor amounts of thorium in aqueous solutions of uranyl nitrate or chloride 1464

464 The saturation pressure of nitrogen in determinations of surface area 1969

465 The determination of aminoid nitrogen in organic compounds by the Kjeldahl method 1969

466 The volumetric determination of aluminium in silicate materials 1969

470 Rapid estimation of uranium in raffinate solutions containing thorium by the pyridylazo-naphthol method 1969

473 Mineralogical examination of tantalite-bearing samples from the Warmbad district. South West Africa 1968

474 The I AEA Conference on the Use of Nuclear Techniques in the Prospec'ing

and Development of Mineral Resources 1969

477 Balanced-temperature analysers 1969

482 Review of work on the treatment of pegmatites 1969

483 Summary of the m neralogical investigation of pegmatites 1969

485 Gravimetric determination, using nitron, of nitrates in uranium compounds 1969

•»86 Determination of strontium in ores by atomic-absorption and emission spectrophotometry 1969 487 The spectrophotometric determination of minor quantities of vanadium in

silicate materials 1969

489 Thermal analysis. Overseas visit 1969

491 The determination of nickel, copper, and cobalt in a nickel alloy matte 1969

493 Concentration of andalusite from alluvial sands from the farm Goedgelegen. Groot Marico district 1969 •*94 A preliminary study of beryllium distribution in phyllosilicates from the Etiro pegmatite. Karibib. South West Africa 1969

496 A preliminary study of beryllium distribution in quartzes from the Etiro pegmatite. Karibib. South West Africa 1969

497 The determination of ferric iron using Tiron 1969 i r MM Pl/BI K ATIONS

49K An infrared imestigation of the potassium alky I xanthate and alkyl trimethyl

ammonium bromide mixed-collector system 1969

The determination of molybdenum by atomic-absorption spectrophotometry 1969 502 The \olumetric determination of chloride and bromide using meicurous perchlorate 1969 Rapid estimation. b\ the ammonium thiocyanate method, of uranium in raffinate solutions containing thorium, lead, and copper 1969

504 The influence of preadsorbed oleate ions on the adsorption of water vapour by insoluble ionic crystals 1969

5 (IS The distribution of nickel in serpcntinite samples of borehole cores from the Msauli Mine. Barb» rton 1969

510 The performance of a clarifier subject to low-intensity turbulence 1969

511 The determination of silica in chrome ores and chrome refractories 1964

512 The distribution of nickel in two surface samples of serpentinite 1969

513 Gold recovery bv cvanidation from mill products obtained after pyrite flotation 1969

515 The influence of sulphydryl and cationic flotation reagents on the cyanidation

of native gold 1969 517 Radiotracer tests on the pachucas on the uranium plant at Western Reefs Mine 1969 518 The prediction of gravity or inertial separation efficiencies from heavy-liquid

524 tests and Tromp-type efficiency curves. An improved method 1969

52f> The determination of minor amounts of molybdenum in soil samples 1969

527 The determination of the platinum-group metals and gold in ore samples 1969

Quantitative aspects of the interaction between galena, xanthate. and oxygen 529 at apH value of 10 1969 530

The determination of uranium in the organic solvent from the Purlex process 1969 533

The measurement of 14 MeV neutron fluxes from a neutron generator 1969 536 Determination of the stoichiometry and stability constants of mercury ll-cyanide-xanthate complexes, I. Low-concentration region 1969 The distribution of nickel in limonite-bearing birbirite and gossan from 537 VlakfonteiFlame-photometrin and Groenfonteic determination in thne owesterf lithiun Transvaam with lth e Techtron AA4 1969 spectrophotometer 1969

L itaw MM PUBLICATIONS

837 The association of gold and uranium with other minerals in different Wirwatersrand reefs 1969

845 An electron-microprobe study of the nickel distribution in a serpentinite from Volspruit. Potgietersrus 1969

847 The liquid-liquid extraction of ferric thiocyanate complexes with carboxylic

acids 1969

848 The distribution of nickel in serpentinite from Lusinzi. north-eastern Transvaal 1969

853 The determination of silicon in ferrochrome alloys 1970

857 The volumetric determination of bismuth in metallurgical ores and concentrates 1969 870 Determination of the stoichiometry and stability constants of mercury(l!)-cyanide-xanthate complexes. II. High-concentration region 1970

884 Review of information on the mineral industry of Mozambique 1970

889 The simultaneous determination, by instrumental thermal-neutron activation analysis, of some selected trace elements likely to be present in lunar material 1969

890 The determination of the platinum-group metals and gold in ore samples- Part II 1969

891 Calibration of the "Universal Voltronics' power supply for the neutron generator manufactured by Accelen. ors Incorporated 1969

894 The determination of thorium in silicate rocks 1969

897 Nickel in South Africa with special reference to low-grade nickeliferous ores 1970

898 The development of a computer programme for countercurrent operations involving liquid-solid solute separations 1970

911 The recovery of gold from sulphidic and arsenical ores mainly from the

Barberton area 1970

938 Life test on IRA 400 resin during the recovery of zinc chloride 1970

943 An electron-microprobe investigation of chiastolite crystals 1970 950 A mineralogical study of eight samples of phosphate ore from Steenkampskraal. Van Rhynsdorp. Cape Province 1970

951 Colorimctric determination of minor quantities of nitrate in uranium compounds 1970

952 The analysis of ferrochrome slag 1970

961 The preparation of standard solutions for the platinum-group metals and gold 1970

is MM PUBLICATIONS

9M The recovery of copper from sulphate leach liquors by liquid ion exchange with LIX-MN 1970

965 The spectrophotometry' determination of phosphate in leach residues and

solutions 1970

967 Automatic timing of the neutron-generator counting station 1970

971) The determination, by atomic-absorption spectrophotometry, of platinum. palladium, rhodium, ruthenium, gold, silver, and lead, in prills 1970 971 The determination of gold by atomic absorption, and of platinum, palladium. rhodium, and iridium by spectrophotometry, in solutions 1970

975 Visit to the Tripartite Chemical Engineering Conference in Montreal 1970

976 The determination, by atomic-absorption spectrophotometry, of gold in cupellation prills and in platinum-metal concentrates 1970

977 The collection and rapid determination of noble metals in ores and concentrates by the fusion technique using lead as a collector 1970

9K7 Rhythmic-activation analysis 1970

991 The determination of thorium in solid samples and in solutions resulting from the leaching of ores 1970

994 The separation and determination of noble metals by reversed-phase

extraction chromatography 1971

996 An improved ilistrihuted-parameter model for the kinetics of mineral flotation 1970

998 The determination of macroscopic amounts of total rare-earth oxides and thorium oxide 1970 1003 The chromatographic separation and determination of platinum, palladium.

rhodium, and iridium 1970

1005 Modifications to the Intertechnique 4000-channel analyser 1970

1010 The leaching, with hydrofluoric acid, of materials containing tantalum and niobium 1970 1012 The coordination numbers of cyanide complexes of /inc. cadmium, and mercurv in aqueous solution 1970

1013 The instrumental neutron-activation analysis of samples taken at different levels of the H.R.P.M. Mine 1970

1017 The spectrophotometry determination of rhodium 1970

1020 Phase relationships involving iron, chromium, silicon, and carbon, with special reference to high-carbon ferrochromium and ferrochromium-silicide alloys. A literature siir\ev 1970 NIM PUBLICATIONS

1025 An introduction to stochastic differential equations. Abbreviated lecture notes I971

1026 Small-scale flotation techniques 1970

1028 Exploratory heavy-liquid separation tests on a low-grade apatite concentrate 1970

1031 The dissolution of UQ. as an electron-transfer reaction 1970

1037 The determination of gold in concentrates of the platinum-croup metal* after

extraction with dibutyI Carbitol' 1970

1043 The determination of ruthenium in uranyl fluoride 1970

1044 The determination of ruthenium in uranyl fluoride 1970

1048 The determination, by neutron-activation and tracer techniques, of the losses of iridium during the fire-assay procedure for the platinum-group metals 1970 1049 Exchange visit to the Institut fur Spektrochemie und Angewandte Spcktroskopie in Dortmund. West Germany 1970

1075 The preparation oi PADAP - 2-(2-pyridylazo)-5-diethylaminophenol (zinc complex) 1970

1076 The direct determination of acid-soluble uranium in silicate ores and in the solutions resulting from leaching these ores 1970

1077 The determination of acid-soluble, acid-insoluble, and total uranium in silicate ores 1970

1078 The complexometric determination of zinc in ores and concentrates, with ion-exchange resin 1970

1085 The optimization of the design of a countercurrent liquid-liquid-extraction plant using LIX-64N 1970

1086 The determination, by atomic-absorption spectroscopy, of platinum, palladium, rhodium, ruthenium, and gold in the presence of base metals 1970

1088 The determination of ferrous iron in refractory minerals 1970

1089 The rapid volumetric determination of calcium in pregnant solutions in uranium plants 1970

1093 The calculation of the equilibrium distribution of metal-ion complexes in multicomponcnt aqueous systems 1970

1096 The spectrophotomelric determ< nation of titanium in ores, rocks, and minerals.

with diantipyrylmethanc 1970

1106 Computerization of atomic-absorption data with the Olivetti Programma 101 1970

1108 Interferences relating to the determination of the noble metals by atomic-absorption spectrophotometry 1970 N1M PUBLICATIONS

1113 The determination of uranium in ores and solutions by X-ray fluorescence 1970

1114 A study of the products of reaction between galena and aqueous xanthate solutions 1970

1125 Studies of the stability of xanthates and dixanthogen in aqueous solution, and the chemistry of iron xanthates and cobalt xanthates 1971

1137 The determination of the platinum-group metals and gold in ore samples- Part II! 1971

1144 Three-dimensional predominant-area and solubility diagrams for the uranyl carbonate and uranyl sulphate systems at 25 °C 1971

1145 The us" of 2-(2-pyridylazo)-5-diethyl aminophenol as a spectrophotometric reagent for the determination of uranium 1971

1153 E„/E„ diagrams. Their use in the estimation of unknown standard reduction potentials, with particular reference to the d'" electronic-configuration ions 1970

1154 The extraction and separation of niobium and tantalum by liquid-liquid extiaction using tri-n-butyl phosphate 1970

1158 The production of ferric sulphate and sulphuric acid by the autoxidation process using the Fring's Aerator 1970

1163 The computer programming of atomic-absorption measurements on the

Olivetti Programma 101 1970

1172 A visit to Outokumpu Oy Research Laboratory in Finland 1970

H 78 Further leaching tests, with hydrofluoric acid, on a tantalite concentrate 1970

1179 The spectrophotometric determination of iridium 1971

1185 The recovery of nobie metals for analysis. A radiotracer investigation of losses 1971 1203 The chromite of the Bushveld Igneous Complex. An assessment of published information 1971

1204 The flotation of phoscoritc ores. Possible correlations between chemical variables in solution and metallurgical performance 1971

1205 The adsorption of uranyl species on pyrophyllite. quartz, and acid-treated

South African uranium ores, A preliminary investigation 1971

1206 A review of the South African platinum-mining industry 1971

1209 The economics of instrumentation for the cyanidation of gold 1971

1217 Investigation of beach sands from Bantu Area No. 4. Nhlabane. Zululand 1971

1218 The acid-extraction of noble metals from low-grade concentrates and ores, and the subsequent determination of platinum, palladium, rhodium, and gold 1971 NIM PUBLICATIONS

1219 Spectrographs analysis for the noble metals present in solutions 1971

1222 The liquid-liquid extraction of zinc from zinc chloride solutions by the use of di-2-ethyl hexyl phosphoric acid 1971

1230 The determination of copper and zinc in borehole cores with the Ekco Mineral

Analyser 1971

1232 The determination of osmium 1971

1245 The separation of non-volatile noble metals by reversed-phase extraction chromatography 1971 1247 The pelletizing of chromite fines. A preliminary investigation of the preparation of cold-bonded pellets 1971

1257 Aspects of the Seventh X-ray Analytical Conference. Durham. September 1970 1971

1260 Interference by base metals in the spectrophotometric determination of platinum metals 1971

1267 The development of an electrodeless conductivity meter 1971

1268 A two-stage process for the recovery of flotation concentrates from copper-zinc ores 1971

1273 The coprecipitation of noble metals from tellurium. I. Platinum, palladium. rhodium, and gold 1971

1281 The heavy-medium cyclone concentration plant for the treatment of andalusite sands on the farm 'Wonderfontein'. Groot Marico district 1971

1282 The determination of free hydrofluoric acid in the leach liquors from tantalum-niobium ores 1971

1296 A review of reactions in the flotation system galena-xanthate-oxygen 1971

1305 The determination of total sulphur in the dust from nylon thread 1971

1308 Heavy-medium tests for the treatment of pegmatite ores and dump material in

Namaqualand 1971

1310 South African costs of industrial equipment for the metallurgical industry 1971

1318 The determination, by atomic-absorption spectrophotometry, of osmium and

iridium in solution 1971

1319 Nickel minerals from Barberton. V. Trevorite 1V71

1322 The preparation and analysis of minerals for use as reference material 1971

1324 The separation of base metals from noble metals by cation exchange 1971 NIM PUBLICATIONS

1340 The cadmium-cyanide-xanthate system 1971

1343 The Pyrometallurgical Research Group's current research programme on ferro-alloys 1971

1351 Preliminary report on the analysis of the six NIMROC geochemical standard

samples 1972

1356 Nickel in samples of serpentinite from Kaapsehoop. Barberton 1971

1361 An electron-microprobe analysis of gold in the Witwatersrand banket and in ores from the Barberton Mountain Land 1971

1365 Studies of incipient fusion in the system chromite-MgO-AI_.0;l-SiO.>-C 1972

1366 Liquidus temperatures, viscosities, and electrical conductivities of lime-containing slags produced during the smelting of high-carbon ferrochromium and ferrochromium-silicide alloys 1971

1371 Concentration of the noble metals by a fire-assay technique using nickel sulphide as the collector 1971

1372 The electrical double-layer properties of kimberlite suspensions 1971

1374 Flotation tests on copper-zinc ore from Letaba district 1971

1380 An electrochemical model for the leaching of uranium dioxide 1972

1384 Flotation tests on samples of Canadian copper-zinc ores 1971

1388 Flotation tests on samples of copper-zinc ores from Finland 1971

1394 The determination of ferrous iron in chromites and chromium ores 1972

1398 The pdlefization of chromite fines. Preparation of pellets bonded with bentonite and indurated by heat treatment 1971

1401 The pressure dissolution of platiniferous materials by the sealed-tube technique 1972

1402 A study of mineral-surface properties by the use of gas-adsorption measurements 1972

1403 The coagulation and flocculation of suspensions of kimberlite 1972

1408 The determination of molybdenum in the solids and solutions resulting from the processing of Witwalersrand uranium ores 1972

1414 The use of a closed recirculation apparatus in the study of the galena-oxygen-xanthate system 1972

1415 The interrelation of the chemical, physical, and certain metallurgical properties of chrome spinels from the Bushveld Igneous Complex 1972 N1M PUBLICATIONS

1423 The effects of chromium oxide, iron oxide, and calcium oxide on the liquidus temperatures, viscosities, and electrical conductivities of slags in the system

MgO-AI20,-SiO. 1972 » 1424 A review of the World's fluorspar industry, with particular reference to South Africa 1972

1425 The effect of the reactivity of lime on desulphurization efficiency in the basic oxygen furnace 1972

1427 The pressed fused-disc - a technique for the preparation of ore samples to be analysed for uranium by X-ray fluorescence 1972

1428 The separation and determination of trace and minor amounts of individual rare earths in silicates 1972

1430 The use of the Ekco Mineral Analyser for the determination of copper and zinc in the presence of iron 1972

1432 The determination of ruthenium and osmium in the residues resulting from the leaching of mattes 1972

1435 The determination of chromium, manganese, iron, cobalt, and nickel by atomic-absorption spectrophotometry usingthe nitrous oxide-acetylene flame 1972

1436 A computer programme for the simulation of the performance of a flotation plant. Revised report 1973

1438 A mineralogical examination of fluorspar ores from the Ottoshoop area 1972

1439 The reaction of sulphide minerals with thiol compounds 1972

1443 Gravity concentration tests on four samples from Tantalite Valley. S.W.A. 1972

1445 Cost assessments for the production of andalusitr concentrates 1972

1447 A preliminary electrochemical investigation of the galena-xanthate-oxygen system in aqueous solution 1972

1448 A potentiostatic study of the anodic dissolution of uranium dioxide in aqueous solutions 1972

1454 A dynamic model for the extraction bank of Purlex plants 1972

1457 Phase equilibria in the Cr-Fe-Si-C system in the composition range representative of high-carbon ferrochrotnium alloys produced in South Africa 1972

1458 Liquidus temperatures in the Cr-Fc-Si system in the composition range representative of ferrochromium-silicidc alloys produced in South Africa 1972

1463 Liquidus temperatures and activities of manganese(ll) oxide in slags associated with the production of high-carbon ferromanganese alloys 1972

1467 The spectral analysis of solutions. I. The analysis of rare-earth minerals 1972 MM PUBLICATIONS

1476 A magnetic-tape-oriented system for data reduction in neutron-activation analysis 1972

1477 The control of Purlex plants 1972

1478 An examination of two andalusite-bearing samples from Magostad No. 6, Marico district, western Transvaal 1972

1479 Infrared studies of the adsorption of oleate species on mineral surfaces, with special reference to fluorite 1972

1482 Reactions occurring during the smelting of high-carbon ferrochromium from Transvaal chromite ores 1973

1483 The South African manpower requirements in extractive metallurgy 1972

1484 Cost estimates for the production of copper wirebars from sulphidic ores 1972

I486 Review of the fluorochemical industry of the World 1972

1488 Extraction of rutile from Highveld smelter slags 1972

1489 The breakage of Soderberg electrodes 1972

1490 The adsorption of krypton, nitrogen, and water vapour on sodium oleate 1972

1491 Technology and economics of the Claus kiln under South African conditions 1972

1495 A method for the determination of elemental sulphur on the surface of sulphide minerals 1972

1499 The production of medium-carbon ferrochromium 1972

1500 The chromatographic separation and determination of noble metals in matte-leach residues 1973

1503 Fast-neutron-activation analysis for the determination of oxygen in rock samples 1973

1505 The production of the refractory aluminium silicates, with special reference to South Africa 1973

1508 The selection of economically mineralized pegmatites according to their border-zone characteristics 1973

1509 The instrumentation developed for electrochemical studies of the leaching of uranium dioxide 1973

1513 The upgrading of chromite ore from Moreesburg 1973

1514 The determination by X-ray-fluorescence spectrometry of minor amounts of niobium and tantalum in geological materials 1973 MM PUBLICATIONS

1515 A mineralogical investigation of titaniferous magnetite from the Mamhula

Intrusion. Natal 1973

1517 Computer-controlled flotation plants in Canada and Finland 1973

1521 The dissipation of electrical power in the burden of a submerged-arc furnace 1973 1522 An electron-microprobe investigation of an exsolved mineral in a sample of magnetite 1973

152f» Heat of solution as a control of aqueous-ammonia concentration 1973

1527 The physicochernical properties of slags associated with the smelting of nickel sulphide concentrates 1973

1529 South African costs of equipment for the metallurgical industry (1972) 1973

1530 AUREOL. - an X-ray-absorption analyser for the determination of the uranium on loaded resin in ion-exchange plants 1973

1533 Fields of application for dispersive and non-dispersive X-ray-fluorescence instruments 1973

1534 The determination, by atomic-absorption spectrophotometry, of noble metals in the presence of sodium, barium, or sulphate ions. A comparison of uranium and lanthanum as releasing agents 1973

1541 Further tests on beach sands from Bantu Area No. 4. Nhlabane. Zululand 1973

1544 The recovery of salable ferrochromium from material discarded by Ferrometals Limited 1973

1545 A mineralogical investigation of leach residues from the BIyvooruitzicht Gold Mine 1973

1546 Pilot-plant smelting campaign on iron ores from Tete 1973

1547 Physicochemical and thermodynamic properties of slags in the system

MgO-AIO,,~Si02 1973

1548 Physicochemical properties of slags in the system MgO-Al.O, - SiO; and their application to the technology of ferro-alloy smelting 1973

1549 Thermodynamic and related physicochemical factors pertaining to the production of ferromanganesc. A literature survey 1973

1550 A fundamental study of the dissolution in acid solutions of uranium minerals from South African ores 1973

1552 The preparation and analysis of minerals for use as reference material. Progress Report No. 2 1973

1553 Characterization of the flotation properties of fluorspar from small-scale batch and pilot-plant tests 1973 MM PTBl.lt"ATIONS

1555 The analysis, by atomic-absorption spectrophotometry, of matte-lcach residues 1973

1556 The spectral analysis of solutions. 2. The analysis of leach liquors, concentrates.

slags, and residues 1973

1557 Cost estimates for the production of pig iron in the Tete district of Mozambique 1973

1559 A cost assessment of the production of elemental sulphur by chlorination

roasting 1973

1562 Application of a flotation model to an industrial plant 1973

1563 Neutron-activation analysis of samples from the Kimberley Reef conglomerate 1973

1565 A mineralogical investigation of the vanadium-rich titaniferous iron ore from

Tete. and the slag produced from it 1973

1566 Comparative tests on coke. char, and anthracite 1973

1567 Estimation of the parameters in the distributed-constant flotation model 1974

156S A computer programme for the estimation of parameters in flotation 1973

1569 The use of DDTU as an analytical reagent for the noble metals 1973

1571 The commissioning of a direct-reading spectrometer for the analysis of silicate

rocks by the use of the graphite-pellet technique 1973

1573 A pilot-plant investigation of a flotation model 1974

1574 The chromatographic separation and gravimetric determination of noble

metals in matic-lcach residues 1973

1575 The recovery of zinc from pickle liquors by ion exchange 1973

1577 Quantitative analysis of fluoritc ores by X-ray diffraction 1973

1579 The determination of tin in geochemical-survey samples 1973

15X0 The determination of silver in ores, concentrates, and mattes 1973

1581 The computer calculation, from fundamental parameters, of influence coefficients for X-ray spectrometry 1974

I5N2 The construction and testing of a precision calorimeter 1973

15H3 Preliminary tests on winnowing for the recovery of mica 1973

1587 A preliminary investigation of the flotation of copper-activated sphalerite without the use of collectors 1973 15X9 Preliminary investigations into the flotation of tin dioxide, cassiterite. and some related gangue minerals 1973 NIM PUBLICATIONS

1590 The separation of osmium from ruthenium in hydrochloric acid solutions 1974

1591 The inductive measurement of conductivity in slags 1974

1592 The determination of line intensities in the presence of interfering spectra in dispersive X-ray-fluorescence spectrometry 1974

1595 Preliminary tests on low-grade brecciated fluorspar ore from the Ottoshoop district 1973

1597 The role of sulphur in the flotation of sulphide minerals 1974

1598 The use of carbon-rod devices in the determination of noble metals by atomic-absorption spectrophotometry 1974

1599 The analysis of silicate rocks and metallurgical slags by X-ray-fluorescence spectrometry 1974

1600 Dilute-acid leaching of slag from Tete ore 1973

1602 The roasting of Tete slag for the extraction of vanadium 1973

1606 The electrical-resistance characteristics of the charge in the electric reduction furnace 1974

1607 The analysis of ion-exchange resins by X-r>y fluorescence 1974

1609 An interlaboratory analysis of two ferrochromium slags 1974

1611 The X-ray-fluorescence determination of percentage concentrations of niobium and tantalum in ores and minerals 1974

1612 Flotation tests on sulphide-bearing high-grade brecciated and wad ores 1974

1613 The deactivation of copper-activated sphalerite with cyanide 1974

1614 The extraction of rutile from smelter slags 1974

1615 Fluorspar pellets. A survey of the World market and an assessment of future

South African production 1974

1617 An electronic differential precision thermometer 1974

1619 Reduction of the chromium in ilmenite concentrates 1974

1620 The recovery of titanium dioxide from Tete slag by the sulphate route 1974 1621 Correction for matrix effects in the analysis of solutions by X-ray-fluorescence spectrometry 1974

1622 The electrical conductivity of the charge in a ferrosilicon furnace 1974

1625 The determination of uranium and thorium by the use of delayed neutrons 1974

:* MM PUBLICATIONS

I 626 Formation constants of zinc chlorocomplexes in perchlorate medium 1974

1628 The recovery of non-ferrous metals from a secondary blast-furnace slag 1974

1629 The thermodynamics of the formation of complexes of silver with some substituted pyridines 1974

1630 An electrochemical investigation of the dissolution of copper, nickel, and copper-nickel alloys in ammonium carbonate solutions 1974

1632 A mineralogical examination of beach-sand concentrates from a pilot plant at Richards Bay 1974

1635 Magnetic separation tests on Tete slag and ore 1974

1636 Trace elements in diamonds from the Premier. Finsch. and Jagersfontein Mines, and their petrogenetic significance 1975

1638 The determination of trace elements in natural diamonds by instrumental neutron-activation analysis 1975

1639 The determination, by 14 MeV neutron-activation analysis, of small amounts

of oxygen and silicon in diamond 1974

1640 A semi-automatic titrimeter for cyanide analysis 1974

1643 Further tests on low-grade brecciated fluorspar ore from the Ottoshoop district 1974

1644 Prospects for the recovery of minerals from the sea 1974

1646 Examination of the methods of analysis for calcium fluoride in fluorspar 1974

1647 The industrial application oi KEGOLD electrodes 1974

1649 The establishment of preferred values for a series of fluorspar samples 1974 1650 The production of medium-carbon ferrochromium alloys by solid-state reduction 1974

1652 The identification of diamonds from Premier. Finsch, and Jagersfontein Mines, by statistical analysis of data obtained from instrumental neutron-activation analysis 1975

1654 The determination of osmium in platiniferous media 1975

1656 The analysis of geological samples for trace elements by direct-reading

emission spectrometry 1974

1660 An economic assessment of the production of high-grade fluorspar pellets 1974

1664 The smelting of copper-nickel concentrates in an electric furnace 1974 1665 The determination of minor amounts of antimony in ores and concentrates by atomic-absorption spectrophotometry 1974 MM PUBLICATIONS

I 668 An updated summary of the Worlds fluorspar industry 1974

1669 An assessment of the carbon-rod atomizer for the determination of silver 1974

1671) Neutron-activation analysis of routine mineral-processing samples 1974

1671 Pyrometallurgical retreatment of a slag for the recovery of vanadium 1974

1679 The detection of noble-metal impurities in refined noble-metal solutions by

thin-layer chromatography 1974

1681 The determination of sulphur and phosphorus in chromite 1975

1 684 The application of three-phase liquid-liquid extraction to the separation and concentration of noble metals 1974 1685 The METSEP process for the separation and recovery of zinc. iron, and hydrochloric acid from spent pickle liquors 1974

1687 The viscosities and electrical conductivities of slags associated with the production of high-carbon ferromanganese alloys 1975

1688 The analysis of nickel-refining solutions: separation of trace elements by liquid-liquid extraction followed by atomic-absorption measurement 1974

1689 The determination by atomic-absorption spectrophotometry of arsenic, selenium, tellurium, antimony, and bismuth on ion-exchange resins 1975

I 691 The determination of zirconium and aluminium by 14 MeV neutron-activation analysis 1975

1693 Research at the National Institute for Metallurgy on the engineering aspects of copper electrowinning 1975

1696 The preparation and certification of a reference sample of a precious metal ore 1975

1697 A petrographic and mineralogical investigation of silica samples from the farm Elandskraal 470 JO. Rustenburg district 1975

1698 Measurement of the electrical resistance of ferrochromium furnace charges 1975

170.1 The geochemistry of some selected South African kimberlites and associated heavy minerals 1976

1705 The effects of various matrix elements on the efficiency of the fire-assay procedure using nickel sulphide as the collector 1975

1706 Concentration of magnesitc from Apiesbomen. Burgersfort district 1975

1707 The work of the Pyromctallurgy Research Group at the University of the Witwatersr;md 1975

170S An examination of the suitability of various reducing agents for the production of fcrrochromium 1975 MM PUBLICATIONS

1709 The mineralogy, chemistry, and certain aspects of reactivity of chromitite from

the Bushveld Igneous Complex 1975

1710 The recovery of scheelite from Shongona. north-western Transvaal 1975

1711 The oxidation of aqueous solutions of ferrous sulphate in a bubble column 1975 1712 The thermodynamics of the formation of chlorocomplexes of nickel and copper(ll) in perchlorate medium 1975

1714 The efficiency of the fire-assay procedure, using nickel sulphide a: a collector.

for platinum, silver, gold, and iridium, and of the subsequent parting procedure 1975

1715 Flotation tests on various types of ore from the Ottoshoop district 1975

1717 The use of isothioronium compounds as liquid-liquid extractants 1975 1718 The determination of silver in lead, copper, and zinc concentrates by instrumental neutron-activation analysis 1975

1719 An evaluation of the X-ray-fluorescence analysis of rocks and silicates under routine conditions 1975

1720 The initial development of processes for the direct leaching of iron-nickel-copper mattes containing platinum-group metals, and for the production of ferronickel 1975

1721 A preliminary investigation into the mechanism of depression in the flotation of sulphide minerals 1975

1722 The determination of small amounts of fluoride in uranium compounds by use of an ion-selective electrode 1975

1723 The determination of zirconium and aluminium in zirconium-aluminium alloys 1975

1724 The preparation and reduction of chromite pellets containing a reducing agent 1975

1725 The determination of silica in fluorspar by 14 Me V neutron-activation analysis 1975

1726 Mertieite and an unnamed compound of palladium with arsenic and tin in a mineral intergrowth from the Atok Mine 1975

1730 The chromitite from the Marico occurrence, western Transvaal, its alteration. and possible reasons for its refractory nature 1975

1732 A mineralogical examination of eight nickel-bearing rocks from the Grasvally Chromite Mine 1975

1736 The determination, by atomic-absorption spectrophotometry and liquid-liquid

extraction, of antimony (parts per million) in ores and concentrates 1975

1739 The determination of trace amounts of noble metals in sulphate media 1975

1741 South African costs of equipment for the metallurgical industry (1975) 1975 MM PIB1 ICATIONS

1742 The determination of tin in ores, residues, and concentrates by X-ray-fluorescence spectrometry 1975

1744 The refining of the platinum-croup metals 1475

1746 The determination, by atomic-absorption spectrophotometry, of minor elements in zinc. lead, and copper sulphide concentrates 1975

1747 Magnetohydrostatic separation of gold from gravity concentrates 1975

1749 Epithermal-neutron-aetivation analysis for uranium in Barberton and Bushveld granites 1975

1750 A review of the present and future development of sulphur production in South

Africa 1975

1753 Full-scale flotation-plant data for modelling purposes 1975

1754 A new three-dimensional anodic electrode for reduced power consumption during the electrowinning of metals 1975 1761 The determination, by atomic-absorption spectrophotometry, of minor elements in anode sludges and residues 1975

1762 The determination, by instrumental neutron-activation analysis, of some elements in the NIMROC standard reference materials 1975

1764 Correlations of the free-energy and enthalpy changes of the

Hg' . and Co- with a variety of monodentatc ligands 1975

1768 Some developments in gold extraction from Witwatersrand ores 1975

1769 An evaluation of the low-pressure ammonia-ammonium sulphate system for the leaching of local base-metal sulphides 1976 1770 The spectrophotometric determination of vanadium in chromium-bearing materials 1975

1771 The determination of silver, selenium, tellurium, antimony, tin, lead, and

arsenic in anode sludges 1975

1772 A study of copper recovery by the lime-roast leach process 1975

1776 The extraction of copper from copper-nickel catholyte by cation exchange 1975

1777 Ferro-alloys in Brazil 1976 1778 An apparatus for the automatic measurement of current efficiencies during the electrodeposition of nickel in chloride media 1976

1779 A summary of work done on the concentration of andalusite from deposits in the western Transvaal 1976

1781 The determination, by ion-selective electrode, of fluoride in complex materials 1976 MM PUBLICATIONS

1782 The application of air-sparging techniques to industrial electrodeposition of zinc from acidic zinc sulphate solutions 1976

1783 The spectrographs determination of minor and trace elements in copper, lead. and zinc concentrates 1976

1784 A single-standard calibration method for use in analysis by X-ray-fluorescence spectrometry 1976

1785 Some thermodynamic aspects of systems relevant to the flotation of sphalerite 1976

1787 The determination, by atomic-absorption spectrophotometry, of trace elements in sulphide concentrates 1976

1788 A computer programme for emission-spectrographic calculations 1976

1790 The rapid determination of manganese, vanadium, and aluminium by instrumental neutron-activation analysis 1976

1791 A motivation for a pyrometallurgical pilot plant 1976

1792 The determination, by instrumental neutron-activation analysis, of some trace elements in sulphide ores and concentrates 1976

1793 The kinetics of mechanism of solvent extraction of copper by L1X 64N and KELEX 100 1976

1794 The application of three-phase liquid-liquid extraction to the analysis of bismuth and tellurium in sulphide concentrates 1976

1795 The determination of minor and trace elements in the leach liquors from anode sludges 1976

1796 The mechanism of the electrodeposition and dissolution of nickel from chloride media 1976

1797 A rapid-atomic absorption method for the determination of silver in sulphide ores and concentrates 1976

1798 Interferences in the determination, by atomic-absorption spectrophotometry.

of copper, lead, and zinc in sulphide concentrates 1976

1799 An electrochemical investigation of copper cementation on iron 1976

1800 An electrochemical investigation of the dissolution and passivation of platinum in acid solutions 1976 1803 The preparation and analysis of minerals for use as reference material. Progress report no. 3. 1976

1804 The electrodeposition of nickel from ammoniacal solutions 1976

1807 The establishment of preferred values for a series of rare-earth samples 1976 NlMItBUCATlONS

1808 Spectrophotometríc determination (with pyrocatechol violet as chromogenic agent) of aluminium in zirconium metals and in the residues from anode sludges 1976

1809 The analysis, by flameless atomic-absorption spectrophotometry, of pure selenium and tellurium 1976

1812 List of unrestricted NIM reports and papers published during the first decade of NIMs existence (1966 to 1975) 1976

1813 The economic potential of some pegmatites from the Kenhardt area in relation

to the trace-element content of their border zones 1976

1814 An updated summary of the World's fluorspar industry. 1975 1976

1815 The commissioning of an induction-coupled plasma system and its application to the analysis of copper, lead, and zinc concentrates 1976 1817 The rapid determination by X-ray-fluorescence spectrometry of tungsten in tungsten ores and concentrates 1976

1818 A microprocessor-based system to control the feed to a ferro-alloy furnace 1976

1820 The thermodynamics of the formation of chlorocomplexes of iron(iii). cobalt(u). iron(il). mangar.cse(n). and copper(n) in perchlorate medium 197:.

1822 Stability constants and linear free-energy relations for the platinum-group

metals 1976

1825 The full automation of a Philips 1220 X-ray spectrometer 1976

1826 Dithiocarbamate as a releasing agent in the atomic-absorption determination of noble metals in organic media 1976 1828 y-picoline adducts of the nickel, copper, and zinc chelates of

2-thenoyltrifluoroacetone 1976

1830 The determination of iron in zircon beach sands and its teachability 1977

1833 Effective thermal conductivities of packed beds of chromite ores 1976

1 #34 The analysis of slag and silicate samples with a fully automatic sequential X-ray spectrometer 1976 1836 The analysis of pilot-plant products for copper, zinc, and lead with the Telsec Lab-X-250 Analyser 1977

1837 The rapid and precise determination of noble metals in matte-leach residues by atomic-absorption spectrophotometry 1976

1838 An investigation of the atomic-absorption spectrophotometric measurement of the elements that form gaseous hydrides and their determination in metal sulphide concentrates 1976 NIM PUBLICATIONS

1839 A valence-bond study of dialkalis and alkali hydrides 1977

1840 The spectrophotometric determination of total uranium in silicate ores and

leach liquors by use of bromo-PADAP 1976

1841 The determination of acid-soluble uranium in silicate ores and solutions 1976

1843 The treatment of Athlone Sewerage-plant effluent by the DESAL process 1976

1845 The composition and mode of occurrence of gold in Witwatersrand ores and leach residues 1976 1847 A pilot-plant investigation of a kinetic model for flotation 1976

1852 A revised method for the pressure dissolution of platiniferous materials by the sealed-tube technique 1976

1853 Chloromethylation of polystyrene resins 1977

1854 The interaction of pyrite. oxygen, and xanthate 1977

1856 A study of model systems in anion exchange 1977

1857 The determination of some trace elements in sulphide concentrates by spectrophotometry 1977

1858 The kinetics and mechanism of the non-oxidative dissolution of some iron sulphides in aqueous acidic solutions 1976

1859 Increased current efficiency during electrodeposition of manganese from sulphate electrolytes 1976

1860 A preliminary investigation of materials of construction for ore hoppers 1976

1861 Tl.e determination of some impurities in zirconium metal by instrumental neutron-activation analysis 1976

1864 The preparation of primary standard solutions for each of the noble metals 1977

1865 A sensitive method for the measurement of osmium by atomic-absorption spectrophotometry 1977

1868 The reduction of fluxed and non-fluxed manganese ores by ferromanganese silicide 1977

1869 The separation and determination of trace elements in iron ore 1977

1872 The determination of mercury by cold-vapour atomic-absorption spectrophotometry 1977

1873 The rapid reduction of gamma-ray spectra with a desk-top calculator 1977

1875 The determination of tungsten and iron in ferrotungsten alloys by X-ray-fluorescence spectrometry 1977 r NIM PUBLICATIONS 1880 The electrochemical reduction of silver chlonde and its application to the

refining of silver 1977

lKHi n-octylaniline. a new treatment for noble metals 1977

18X3 The determination of iron, chromium, titanium, and tungsten in ores and other materials, by X-ray-fluorescence spectrometry 1977 i S86 A rapid method for the determination of fluoride in geological samples 1977 r NIM PUBLICATIONS

3. PAPERS BY NIM STAFF

The papers are arranged alphabetically according to author/s, and chronologically below author. Co-authors from other organizations are indicated by a series of superscripts, which are explained at the end of the list. These papers are not available from NIM, but can be consulted in the relevant journals or books to which reference is made. MM PUBLICATIONS

ALLISON. S. A., and FINKELSTEIN. N.P. A study of the products of reaction between galena and aqueous xanthate solutions. Trans. Instn Min. Metall., vol. 80. no. 781. Dec. 1971. pp. C235-C239.

ALLISON. S.A.. GOOLD. LA.. NICOL. M.J.. and GRANVILLE. A. The products of reaction between sulphide minerals and aqueous xanthate solutions, and a correlation of the products with electrode rest potentials. Metall. Trans., vol. 3, no. 10. Oct. 1972. pp. 2613-2618.

ALLISON. S. A.. HARRIS. P.J.. and MARSICANO. F. Depression and deactivation of sphalerite. J. S.Afr. Inst. Min. Metall.. vol. 76, spec, issue. Oct. 1975. pp. 123-124.

ASHURST. KG., and FINKELSTEIN. N.P. The influence of sulphydryl and cationic flotation reacents on the cvanidation of native gold. J. S.Afr. Inst. Min. Metall.. vol. 70. no. 6, pt 2. Jan. 1970. pp.~248-256.

ASHURST. KG.. FINKELSTEIN. N.P., and GOOLD. LA. The coordination numbers of cyanide complexes of zinc, cadmium, and mercurv in aqueous solution. J. chem. Soc. (A), 1971. pp. 1899-1902.

ASHURST. KG., FINKELSTEIN. N.P.. and RICE. N.M. Studies of cyanide-xanthate mixed-ligand complexes of mercury(ll). J. chem. Soc. (A). 1970. pp. 2302-2307.

ASHURST. KG., and NEALE. R.W. The porosity of gold electrodeposits. Trans. Inst. Metal Finishing, vol. 45. no. 2. 1967. pp. 75-82.

ATMORE. R.B.§§, HOW AT, D.D.', and JOCHENS, PR. The effect of slag and gold bullion composition on the removal of copper from mine bullion by oxvgen injection. J. S.Afr. Inst. Min. Metall.. vol. 72. no. 1. 1971. pp. 5-11.

AUSTEN. C.E., and STEELE, T.W. The computer calculation, from fundamental parameters, of influence coefficients for X-ray specitomelTy. ADVANCES I\ X-RAY A\ALYSIS. Pickles, W.L., Barrett, C.S., Newkirk, J.B., and Rund, CO. (eds.). London. Plenum Press. 1975. vol. 18. pp. 362-371.

BARCZA.N.A. JOCHENS, PR, and HOWAT.D.D* The mechanism and kinetics of reduction of Transvaal chromite ores. 29th ELECTRIC FURNACE CONFERENCE PROCEEDINGS. Metal­ lurgical Society ofAIME. New York. AIME. 1972. vol. 29. pp. 88-93.

BERNING, J.', COOKE. R.\ HIEMSTRA. S.A.. and HOFFMAN, U. The Róssing uranium deposit. South West Africa. Econ. Geol., vol. 71. 1976. pp. 351-368.

BIBBY, D.M., and RASMUSSEN. S. Reactor neutron flux monitoring with iron foils. Radiochem. radioanalyt. Lett., vol. 9. no. I. 1972. pp. 1-8.

BIBBY. DM., and RASMUSSEN. S. Performance of a counting head ffr an automatic sample changer. Radiochem. radioanalyt. Lett., vol. 14, no. 1. 1973. pp. 9-15.

BIBBY. DM., and SELLSCHOP. J.P.F.* Determination of copper, zinc. iron, and silicon in copper/zinc ore flotation products bv fast neutrons. Radiochem. radioanalyt. Lett., vol. 12. no. 4-5. 1972. pp. 245-257.

BIBBY, DM., and SELLSCHOP. J.P.F.* The determination of oxygen and silicon in diamonds by 14 VteV activation analysis./ radinanalyt. Chem., vol. 22. 1974. pp. 103-111.

BOEYENS. J.C.A. Electrostatic calculation of bond energy. J. S.Afr. Chem. Inst., vol. 26. no. 3. 1973. pp. 94-105.

BOEYENS. J.C.A.. McDOUGALL. G.J.. and SMIT. J.V.R.* Crystallographic study of the ammonium-potassium 12-molvbdophosphate inn-exchange svstem. J. solid State Chem.. vol. 18. 1976. pp. 191-199.

BROOKS. H.C.t. and PAUL. R.L. Densities and excess volumes of fused halides. Z. Naturforsch.. vol. 30a. 1975. pp. 64-68.

IK MM PUBLICATIONS

BRYNARD. H.J.. DE VILLIERS. J.P.R.. and V1LJOEN. E.A. A mineralogical investigation of the Merenskv Reef at the Western Platinum Mine, near Marikana. South Africa. Econ. Geol.. vol. 71. no. 7. 1976. pp. 1299-1307.

BUSHELL. L.A.. and VEITCH. M.L. The influence of chemical environment during milling on the flotation of zinc from complex sulphide ores./ S.Afr. Inst. Min. Metall., vol. 76. spec, issue. Oct. 1975. pp. 143-145.

CHANNON. W.P.. and SEE. J.B. The reduction of fluxed and non-fluxed manganese ores by ferromanganese silicide. J. S.Afr. Inst. Min. Metall., vol. 77, no. 8. Mar. 1977. pp. 151-162.

CHANNON. W.P.. UROUHART. R.C., and HOWAT. D.D.* The mode of current transfer between electrode and slag in the submerged-arc furnace. J. S.Afr. Inst. Min. Metall., vol. 75. no. I. Aug.. 1974. pp. 4-7.

COALE. R.D.*. WOLHUTER. C.W.*. JOCHENS. PR., and HOWAT. D.D.* Cementitious properties of metallurgical slags. Chem. Concr. Res., vol. 3, no. 1. 1973. pp. 81-92.

COLBORN. R.P.4. and NICOL, M.J. An investigation into the kinetics and mechanism of the oxidation of iron(ll) by oxygen in aqueous chloride solutions./ S.Afr. Inst. Min. Metall., vol. 73, no. 9. Apr. 1975. pp. 281-289.

COOK. E.B.T.. and GEREGHTY. A. The spectrophotometric determination of uranium by use of 2-(2-pvridylazo)-5-diethvlaminophenol (PADAP). Bull. S.Afr. Inst. Assayers Analysts, no. 12. Jul. 1971. pp. 1-10.

CZAMANSKE. G.K.. and MIHÁLIK, P. Oxidation during magnetic differentiation, Jinmoskia Complex. Oslo area. Norway: Part 1. The opaque oxides. J. Petrol, .vol. 13.no. 3.1972. pp. 493-509.

DE VILLIERS, J.PR. The crystal structure of braunite with reference to its solid-solution behaviour. Amer. Mineralogist, vol. 60. 1975. pp. 1098-1104.

DE VILLIERS, J.P.R.. and BOFYENS. J.C.A. Crystal structure of a calcium sulphate-urea complex./ Cryst. Mol. Struct., vol. 5. 1975. pp. 215-226.

DE WAAL. S.A. Ramsdellite from the Hotazei Mine, northern Cape Province, South Africa. Econ. Geol.. vol. 64, no. 2. 1969. pp. 221-222.

DE WAAL, S.A. On the origin of hydrogrossularite and other calcium silicates in serpentinites. Trans. Geol. Soc. S.Afr., vol. 72. pt 1. Jan.-Mar. 1969. pp. 23-27.

DE WAAL. S.A. Nickel minerals from Barberton. Soulh Africa: I. Ferroan trevorite. Am. Mineralogist, vol. 54. no. 7/8. Jul.-Aug. 1969. pp. 1204-1208.

DE WAAL. S.A. Interference-folding of Bushveld Igneous Complex age in the Transvaal System north of Marble Hall, Transvaal. Johannesburg. Geological Society of South Africa. Spec. Pub. 1. 1970. pp. 283-298.

DE WAAL, S.A. Nickel minerals from Barberton. South Africa:II. Nimite, a nickel-rich chlorite. Am. Mineralogist, vol. 55. no. 1/2. Jan.-Feb. 1970. pp. 18-30.

DE WAAL. S.A. Nickel minerals from Barberton. South Africa: III. Willcmseite. a nickel-rich talc. Am. Mineralogist, vol. 55. no. 1/2. Jan.-Feb. 1970. pp. 31-42.

Db WAAL, S.A. South African nickeliferous serpentinites. Miner. Sci. Engng. vol. 3, no. 2. Apr. 1971. pp. 32-45.

DE WAAL. S.A. The Bushveld granites in the Zaaiplaatsarca. Trans. Geol. Soc. S.Afr.. vol. 75. pt 2. May-Aug. 1972. pp. 135-147.

DE WAAL. S.A. Nickel minerals from Barbcrton. South Africa: V. Trevorite redescribed. Am. Mineralogist, vol. 57. no. 9/10. Scp.-Oct. 1972. pp. 1524-1527.

h) NIM PUBLICATIONS

DE WAAL. S.A.. and CALK. L.C.§ Nickel minerals from Barberton. South Africa: VI. Liebenbergite. a nickel olivine. Am. Mineralogist, vol. 58. no. 7/8. Jul.-Aug '973. pp. 733-735. DE WAAL. S.A.. and CALK. L.C.§ The sulfides in the garnet pvroxenite xenoliths from Salt Lake Crater. Ohio. J. Petrol., vol. 16. no 1. Feb. 1975. pp. 134-153.' DE W AAL. S. A., and HERZBERG. W. Uranium and gold mineralization of the Black Reef Series in the Kaapse Hoop area, Neispruit District, eastern Transvaal. Annals Geol. Soc. S.Afr., vol. 7. 1968-1969. pp. 111-124.

DE WAAL. S.A.. and V1LJOEN. E.A. Nickel minerals from Barberton. South Africa: IV. Reevesite, a member of the hydrotalcite group. Am. Mineralogist, vol. 56, no. Í/6. May-Jun. 1971. pp. 1077-1081.

DE WAAL. S. A., VILJOEN, E.A., and CALK. L.C.§ Nickel minerals from Barberton. South Africa. VII. Bonaccordite. the nickel analogue of Hdwigite Trans. Geol. Soc. S.Afr., vol. 77, pt 3. Sep.-Dec. 1974. p. 375.

ENGELBRECHT, J. A., and WOODBURN, E.T.t The effects of froth height, aeration rate, and gas precipitation on flotation./ S.Afr. Inst. Min. Metall., vol. 76, spec, issue. Oct. 1975. pp. 125-131.

FAURE, A.$. and TUNLEY, T.H. Uranium recovery by liquid-liquid extraction in South Africa. THE RECOVER Y OF URANIUM. International Atomic Energy Agency. Vienna, the Agency, 1971. pp. 241-251.

FESO. H.W.i, BIBBY. D.M., SELLSCHOP, J.P.F.*, and WATTERSON, J.I.W. The determination of trace-element impurities in natural diamonds by instrumental neutron-activation analysis. J. radioanalyt. Chem., vol. 17. 1973. pp. 195-216.

FESO, H.W.i, KABLE. E.J.D., and GURNEY, J.J.* Aspects of the geochemistry of kimberlites from the Premier Mine and other selected South African occurrences with particular reference to the rare earth elements. PHYSICS AND CHEMISTRY OF THE EARTH. Ahrens, L.H., Dawson, J.B.. Duncan, A.R.. and Erlank, A.J. (eds.). Oxford, Pergamon, 1975. vol. 9. pp. 687-707.

FINKELSTEIN, N.P. Kinetic and thermodynamic aspects of the interaction between pot issium ethyl xanthate and oxygen in aqueous solution. Trans. Instn Min. Metall.,vo\. 76, no. 724. Mar. 1967. pp. C51-C59.

FINKELSTEIN. N.P. The influence of alkyltrimethyl ammonium halides on the stability of potassium ethyl xanthate in aqueous solution. /. appl. Chem., vol. 19, Mar. 1969. pp. 73-76. FINKELSTEIN. N.P. Quantitative aspects of the role of oxygen in the interaction between xanthate and galena. Sepn Sci., vol. 5, no. 3. Jun. 1970. pp. 227-256.

FINKELSTEIN, N.P. The chemistry of the extraction of gold from its ores. GOLD METALLURGY IN SOUTH AFRICA. Adamson, R.J. (ed.). Johannesburg. Chamber of Mines of South Africa. 1972. pp. 284-351.

FINKELSTEIN, N.P. The rate of decomposition of alkaline xanthate solutions. Colloid Polymer Sci., vol. 255. 1977. pp. 168-169.

FINKELSTEIN. N.P.. and ALLISON, S. A. The chemistry of activation, deactivation and depression in the flotation of zinc sulphide: a review. FLOTATION. A.M. GAUDIN MEMORIAL VOLUME. Fuerstenau, M.C. (ed.) vol. 1 New York, American Institute of Mining, Metallurgical and Petroleum Engineers. Inc., 1976. pp. 414-457.

FINKELSTEIN. N.P., ALLISON, S.A., LOVELL, V.M., and STEWART, B.V. Natural and induced hydrophobicity in sulphide mineral systems. ADVANCES IN INTERFACIAL PHENOMENA OF PARTICULATE/SOLUTION/GAS SYSTEMS; APPLICATION TO FLOTATION RESEARCH. Somasundaran, P., and Grieves, R.B. feds). New York, AlChE, Chemical Engineering Progress Symposium Series no. 13, 1975.

4(1 SIM PI BLICATIONS

FINKELSTEIN. N.P.. and HANCOCK. R.D. A new approach to the chemistry of gold. Gold Bull. vol. 7. no. 3. Jul. 1974. pp. 72-77.

FINKELSTEIN. N.P., and LOVELL. V.M. Fundamental studies of the flotation process: the work of the National Institute for Metallurgy. J. S.Afr. Inst. Min. Metall.. vol. 72. no. 12. Jul. 1972. pp. 328-341. FLETCHER. G.W. Process control. GOLD METALLURGY IN SOUTH AFRICA. Adamson. R.J. led). Johannesburg. Chamber of Mines of South Africa. 1972. pp. 256-283. GASPARRINI. E. Electron-microprobe quantitative analysis by energy-dispersive spectrometry. PROCEEDINGS. ELECTRON MICROSCOPY SOCIETY OF SOUTHERN AFRICA. PRETORIA CONFERENCE. Durban, the Society, 1975. vol. 5. pp. 121-122. GASPARRINI. E. The energy-dispersive spectrometer: a new tool of investigation for the earth scientist. Miner. Sci. Engng. vol. 8. no. I. Jan. 1976. pp. 3-22. GASPARRINI. E.. and HIEMSTRA. S.A. Paolovite (Pd.Sn) from the Atok Mine in the Merenskv Reef. Trans. Geol. Soc. S.Afr.. vol. 78. 1975. pp. 167-169. GAUDIN. A.M.tt. and FINKELSTEIN. N.P. Interactions in the system galena-potassium ethyl xanthate-oxygen. Nature, Lond., vol. 207. no. 4995. Jul. 1965. pp. 389-391.

GOOLD. LA.. LIN, I.J.. LOVELL. V.M., and FINKELSTEIN. N.P. OiMevitation extraction: a variation of flotation. J. S.Afr. Inst. Min. Metall., vol. 76. spec, issue. Oct. 1975. pp. 132-134. GÓSSLING. H.H.. and McCULLOCH, H.W. Fluorspar - the use of a non-metallic mineral. Miner. Sci. Engng, vol. 6. no. 4. Oct. 1974. pp. 206-222. GRANVILLE. A. The recovery of deep-sea minerals: problems and prospects. Miner. Sci. Engng. vol. 7. no. 3. Jul. 1975. pp. 170-188. GRANVILLE. A.. FINKELSTEIN. N.P.. and ALLISON, S.A. Review of reactions in the flotation system galena-xanthatc-oxygen. Trans. Instn Min. Metall.. vol. 81, no. 784. 1972. pp. C1-C30.

GUEST. R.N. A laboratory investigation of the importance of the circulating load in the control of particle-size distribution. J. S.Afr. Mech. Engrs, vol. 22, no. 2. Feb. 1972. pp. 46-51. GUEST. R.N. The recovery of pvrite from Witwatersrand gold ores. J. S.Afr. Inst. Min. Metall.. vol. 76. spec, issue. Oct. 1975. pp. 103-105.

GURNEY. J.J.Í. FESO, H.W.t. and KABLE. E.J.D. Clinopyroxene-ilmenite xenolites from kimberlites. LESOTHO KIMBERLITES. Nixon, P.H. (ed.). Maseru, Lesotho National Development Corporation. 1973. pp. 238-254.

HAINES. A.K.. CRAIG. W.M4. FAURE, At. HENDRIKSZ. A.R.Í. WILLS. W. J.*, and NICOL, D.I. The use of weak-base resins in the recovery of uranium from unclarificd leach liquors. ELEVENTH INTERNATIONAL MINERAL PROCESSING CONGRESS 1975. Instituto di Arte Mineraria. Rome. Aziende Tipografichc Bardi. 1976. Paper 32. pp. 1-28. HAINES. A. K.. EDWARDS. R.I.. and TE RIELE, W. AM, The separation of gold from acidic leach liquors with Ambcrlite XAD-7. THE THEORY AND PRACTICE OF ION EXCHANGE (AN INTERNATIONAL CONFERENCE HELD AT CHURCHILL COLLEGE, UNIVERSITY OF CAMBRIDGE 25TH-30TH JULY. 1976). M. Streat (ed.). London. Society of Chemical Industry. 1976. pp. 40.1-40.12.

HAINES. A.K.. KING. R.P.. and WOODBURN. E.T.t The interrelationship between bubble motion and solids mixing in a gas-fluidized bed. AlChE, vol. 18. no. 3. May 1972. pp. 591-599.

HAINES. A.K.. TUNLEY. T.H.. TE RIELE. W.A.M., CLOETE. F.L.D.. and SAMPSON. T.D.Í The recovery of zinc from pickle liquors by ion exchange. /. S.Afr. Inst. Min. Meiall., vol. 74. no. 4. Nov. 1973. pp. 149-157.

41 NIM PUBLICATIONS

HALL. PC*. LOVELL. V.M.. and FINKELSTEIN. N.P. Adsorption of water vapour on ionic solids containing preadsorbed sodium oleate. Part 1. Calcium fluoride. Trans. Farad. Soc.. vol. 66, no. 570. Pt f>. Jun. 1970. pp. 1520-1529.

HALL. P.G.*. LOVELL. V.M.. and FINKELSTEIN. N.P. Adsorption of water vapour on ionic solids containing preadsorbed sodium oleate. Part 2. Calcium carbonate. Trans. Farad. Soc.. vol. 66. no. 574. Pt 10."Oct. 1970. pp. 2629-2635. HANCOCK. R.D.. and EVERS, A. Formation constant of Pd(CN)i . Inorg. Chem.. vol. 15. 1976. pp. 995-996.

HANCOCK. R.D.. and FINKELSTEIN. N.P. JT and a-bonding in the stabilities of

HANCOCK. R.D.. FINKELSTEIN. N.P.. and EVERS, A. Some observations on a recent determination of the stability of the dicyanocuprate(i) ion. J. inorg. nucl. Chem., vol. 38. 1976. pp. 343-344.

HANCOCK, R.D., and MARSICANO, F. The chelate effect: a simple quantitative approach. /. Chem. Soc.. Dalton Trans., no. 12. 1976. pp. 1096-1098. HANCOCK. R.D., and MARSICANO. F. The linear free-energy relation in the thermodynamics of complex formation. Part 1. Correlations involving enthalpy changes on complex formation of silver(i) and mercury(il) with •soft' donor ligands./. Chem. Soc, Dalton Trans., 1976. pp. 1832-1837. HARR'S. P.J.. and FINKELSTEIN, N.P. Interactions between sulphide minerals and xanthates. I. The formation of monothiocarhonate at galena and pyrite surfaces. Int. J. Miner. Proc, vol. 2, no. 1. 1975. pp. 77-100.

HARRIS, P.J., and FINKELSTEIN, N.P. The formation of monothiocarbonates during the reaction between xanthates and sulphide minerals in flotation systems. PROCEEDINGS ELEVENTH MINERAL PROCESSING CONGRESS. Ente Minerario Sardo. Cagliari, Instituto di Arte Mineraria. Special volume, 1975. pp. 35-57.

HAWKINS, DM.*, and RASMUSSEN, S.E. Use of discriminant analysis for the classification of strata in sedimentary successions. Math. Geol.. vol. 5, no. 2. 1973. pp. 163-177.

HEJJA, A.A., HOW AT, D.D.*, and JOCHENS, PR. The effect of the reactivity of lime on desulphurization efficiency in the basic oxygen furnace/ S.Afr. Inst. Min. Me tall., vol. 73, no. 8. Mar. 1973. pp. 249-257.

HIEMSTR A. S.A. The mineralogy and petrology of the uraniferous conglomerate of the Dominion Reefs Mine, Klerksdorp area. Trans. Geol. Soc. S.Afr., vol. 71, no. 1. 1968. pp. 1-65.

HIEMSTR A. S.A. The geochemistry of the uraniferous conglomerate of the Dominion Reefs Mine. Klerksdorp area. Trans. Geol. Soc. S.Afr.. vol. 71, no. 1. 1969. pp. 67-100. HIEMSTR A. S.A. Photomicrography. Miner. Sci. Engng. vol. I. no. 2. Jul. 1969. pp. 34-50. JOCHENS, P.R. Technology transfer between a State-sponsored research institute and industry. PROCEEDINGS OF THE SYMPOSIUM ON TECHNOLOGY TRANSFER. South African Council for Scientific and Industrial Research. Pretoria, CSIR, 1974, pp. 38-52.

ii NIM PUBLICATIONS

JOCHENS. PR.. SOMMER. G.. and HOW AT. D.D.* Preliminary equilibrium and non-equilibrium phase studies of titaniferous slags. J. Iron Steel Inst., vol. 207. no. 2. Feb. 1969. pp. 187-192.

JOHNSTON. G.H.. JOCHENS. PR.. AND HOW AT. D.D.* Physicochemical properties of slags in the system MgO-Al_.0,-SiO_. and their application to the technology of 'erro-alloy smelting. INFACON 74. Glen, H. ied.). Johannesburg. South African Institute of Mining and Metallurgy. 1975. pp. 217-225.

KABLE. E.J.D.. FESQ. H.W.t. and GURNEY, J.J.* The significance of interelement relationships of some elements in South African kimberlites. PHYSICS AND CHEMISTRY OF THE EARTH. Ahrens, L.H., Danson, J.B., Duncan, A.R., and Erlank, AJ. teds). Oxford, Pergamon. 1975. vol. 9. pp. 709-734.

KELEGHAN. W.T.H. Some potential applications of wet high-intensity magnetic separation. J. S.Afr. Inst. Min. Metall.. vol. 76. spec, issue. Oct. 1975. pp. 108-110.

KELEGHAN. W.T.H. WHIMS for low-grade uranium. Nucl. Active, no. 16. Jan. 1977. pp. 3-5.

KING. R.P. Some problems in chemical reactor analysis with stochastic features. / A EC Fundamentals, vol. 9. no. I. Feb. 1970. pp. 190-191.

KING, R.P. Continuous flow systems with stochastic transfer functions. II. Solution by the associated Kolmogorov equation. Client. Engng Sci.. vol. 26. no. 5. May 1971. pp. 729-737.

KING. R.P. Continuous flow systems with stochastic transfer functions. III. Stationary operation with chemical reaction. PROCEEDINGS AND INTERNATIONAL SYMPOSIUM ON CHEMICAL REACTION ENGINEERING. Amsterdam, Elsevier Publishing Co.. 1971. pp. B4-35-B4-46.

KING. R.P. Flotation research work of the NIM Research Group, and the Department of Chemical Engineering. University of Natal. J. S.Afr. Inst. Min. Metall.. vol. 72. no. 9. Apr. 1972. pp. 235-245.

KING. R.P. An analytical solution to the batch-comminution equation./ S.Afr. Inst. Min. Metall.. vol. 73. no. 4. Nov. Í972. pp. 127-131.

KING. R.P. Model for the design and control of flotation plants. APPLICATION OF COMPUTER METHODS IN THE MINERAL INDUSTRY. Salomon, M.D.G.. and Lancaster, F.H. teds). Johannesburg. South African Institute of Mining and Metallurgy. 1973. pp. 341-350.

KING. R.P. On-line digital computer control of slurry conditioning in mineral flotation. Automatica, vol. 10. no. I. Jan. 1974. pp. 5-14.

KING. R.P. Applications of stochastic differential equations to chemical engineering problems - an introductory review. Chem. Engng Commtm.. vol. 1. no. 4. Nov. 1974. pp. 221-237.

KING. R.P. Simulation of flotation plants. Trans. Soc. Min. Engrs AIME. vol. 258. no. 4. Dec. 1975. pp. 286-293.

KING. R.P.. GLASSER. D*. and STONE, S.L.* The optimal catalyst-concentration profile for bifunctional catalysts. Journal of Optimization Theory and Application, vol. 10.no. 2. Aug. 1972. pp. 94-108. KING. R.P.. HATTON. T. A.+. and HULBERT. D.G.t Bubble loading during flotation. Trans. Instn Min. Metall.. Sect. C. vol. 83. no. 811. Jun. 1974. pp. CI I2-C115.

KING. R.P.. WOODBURN. E.T.+. COLBORN. R Pi. EDWARDS. R., and SMITH. WE. Dynamic testing of mineral processing equipment using radioisotopes. NUCLEAR TECHNIQUES AND MINERAL RESOURCES. International Atomic Energy Agency. Vienna, the Agency. 1969. pp. 117-127.

KING. R.P. WOODBURN. E.T.+. and TE RIELE. W.A.M. The dispersion of material in slowly moving fluids. Can. J. chem. Engng, vol. 50. no. I. Feb 1972. pp. 3-8.

-H MM PUBLICATIONS

KNIGHT. A. Nuclear power reactors in Britain. S.Afr. Engr, vol. 57. no. 582. Nov. I 966. pp. 57-6 1

KNIGHT. A. Neutron activation analysis. S.Afr. Engr. vol. 58. no. 585. Feb. 1967. pp. 37. 39. 41.

LASCHINGER. J.E. Focus on vital role of the National Institute for Metallurgy. S.Afr. Engr. vol. 59. no. 602. Jul. 1968. pp. 24-29.

LASCHINGER. J.E. The National Institute for Metallurgy.:S.Afr. Min. Engng J., vol. 81. 24th Mar.. 1969. pp. 279-287.

LAXEN. P.A. A kinetic study of the dissolution of uraninites in sulphuric acid. RESEARCH IN CHEMICAL ASD EXTRACTIOS METALLURGY. Australasian Institute of Mining and Metallurgy. Sydney, the Institute. 1967. pp. 181-192.

LAXEN. P.A. The dissolution of UO, as an electron-transfer reaction. THE RECOVERY OF URANIUM. International Atomic Energy Agency. Vienna, the Agency. 1971. pp. 321-330.

LEVIN. J Mixing and sampling procedures used at the National Institute for Metallurgy. South Africa. SAMPLISC, IS THE MIS ERA I. ASD METALLURGICAL PROCESS! SG ISDUSTRIES. Institution of Mining and Metallurgy. London, the Institution. 1973. pp. 28-37.

LEVIN. J . and VE1TCH. ML. Laboratory tests on the flotation of pyrite from Witwatersrand gold «ires by cationic collectors. J. S.Afr. Inst. Min. Metall.. vol. 70. no. 6. pt 2. Jan. 1970. pp. 259-275.

LIEBENBERG. W.R. Mineralogy and the metallurgist. Miner. Sci. Engng, vol. 2. no. 4. Oct. 1970. pp. 3-23.

LIEBENBERG. W.R. Mineraloiiical features of gold ores in South Africa. GOLD METALLURGY IS SOUTH AFRICA. Adamson~R.J. fed.). Johannesburg. Chamber of Mines of South Africa. 1972. pp. 352-U6.

LIN. I.J., and FINKELSTEIN. N.P. The application of magnetohydrostatic separation to metallurgical processes. J. S.Afr. Inst. Min. Metall.. vol. 76. spec, issue. Oct. 1975. pp. I I 1-1 12.

LIN. I.J.. NADIV. S. . and GRODZIAN. D.J.M. Changes in the state of solids and mechano-chemical reactions ;n prolonged comminution processes, Miner. Sci. Engng. vol. 7. no 4. Oct. 1975. pp. 314-336.

LLOYD. P.J. The extraction of the neutral and anionic nitrato complexes of nitrosylruthenium by long-chain alkyl amines. J. S.Afr. Chem. Inst., vol. 20. no. 2. Jun. 1967. pp. 174-185.

LOUW. G.D.++. and LAXEN. P.A. The beneficiation of residue at Blyvooruitzicht Gold Mine. J. S.Afr. Inst. Min. Metall.. vol. 76. spec, issue. Oct. 1975. pp. 136-139.

LOVEDA Y. B.K.+ Analysis of frolh flotation kinetics. Trans. Instn Min. Metall.. vol. 75. Sec. C. Sep. 1966. pp. 219-225.

I.OVEDAY. B.K.t An analysis of comminution kinetics in terms of size-distribution parameters. J. S.Afr. Inst. Min. Metall.. vol'. 68. no. 3. Oct. 1967. pp. 111-131.

LOVEDA Y. B.K.i The prediction of gravity or incrtial separation efficiencies from heavy-liquid tests and Tromp-tvpe efficiency curves. An improved method. Trans. Instn Min. Met all.. \ol. 79. no. 763. .Jun. 1970. pp. CI37-CI40.

LOVEDA Y. B,K.± A model for the leaching ol non-porous particles. J. S.Afr. Inst. Min. Memll..vo). 76. no. 2 Sep. 1975. pp. 16-19.

I OVEDAY. B.K.+. and MARCH ANT. G.R .** Simulation of multicomponcnt flotation plants APPLICATION OF COMPUTER METHODS IN THE MINERAL INDUSTRY. Salomon, M.D.G.. and Lancaster, F.H. Johannesburg. South African Institute of Mining and Metallurgy. 1973 pp. 325-330.

n MM PUBLICATIONS

LOVE DAY. B.K.i. and TOLMA Y. AT. The development of a mathematical model tor large-scale mills. CHEMECA 70. Australian Institute of Chemical Engineer*. Sydney. The Institute. 1971. pp. 141-151.

LOVF.LL. V.M. The determination of the surface area of minerals by the B.E.T. method: some associated problems. Powder Technol.. vol. 12. no. 1975. pp. 71-76.

LOVELL. V.M. Froth characteristics in phosphate flotation. FLOTATION. A.M. GAUDIN MEMORIAL VOLUME. Fuerstenau. M.C. led), vol. 1. New York. American Institute of Mining. Metallurgical and Petroleum Engineers. Inc.. 1976. pp. 597-621.

LOVELL. V.M.. GOOLD. LA. and FINKELSTEIN. N.P. Infrared studies of the adsorption of oleate species on calcium fluoride. Int. J. Miner. Process., vol. I. no. 1. Jan. 1974. pp. 183-192.

LUSHER. J. A. The association of calcium ion with nickeliferouspyrrhotite..S'Mr/flr

LYCETT. RAH*. JOCHENS. PR., and HOWAT. D.D.* The crystallization of rutile from titaniferous slags. S.Afr. Inst. Min. Metall., vol. 76. no. 2. Sep. 1975. pp. 20-24.

MACKENZIE. J.M.W. Zeta-potential studies in mineral processing: measurement techniques and applications. Miner. Sci. Engng. vol. 3. no. 3. Jul. 1971. pp. 25-43.

MALLETT, R.C4 A review of techniques for the determination of gold and silver by atomic-absorption spectroscopy. Mirier. Sci. Engng, vol. 2, no. 3. Jul. 1970. pp. 28-37.

MALLETT. R.C.i, PEARTON. D.C.G.. RING. E.J.. and STEELE. T.W. Interferences and their elimination in the determination of the noble metals bv atomic-absorption spectrophotometry. Talanta, vol. 19. no. 2. 1972. pp. 181-195.

MALLETT. R.ft. PEARTON. D.C.G.. RING. E.J., and STEELE. T.W. Interferences encountered in the determination of the noble metals by atomic-absorption spectrophotometry. J. S.Afr. Client. Inst., vol. 25. no. 3. 1972. pp. 219-229.

MARSICANO. F.. and HANCOCK. R.D. A potentiomctric and calorimetric study of the thermodynamics of formation of some of the complexes of the tl'" metal ions silver) I). mercury) II). and cadmium)ll) with thiodiglycol. thiourea, and the sulphite ion. /. Coord. Chem., vol. 6. 1976. pp. 21-29.

McRAE. LB., and SELMER-OLSEN. S.S.' An investigation into the pclletizing and prereduction of Transvaal chromites. AGGLOMERA TION 77. Sastrv, K. V.S. (ed.). New York. AIME. 1977. vol. I. pp. 356-377.

MclVFR. JR.*. and MIHÁLIK. P. Stannian andradite from Davib Ost\ South West Africa. Can. Mineralogist, vol. 13. no. 3. Aug. 1975. pp. 217-221.

McNALLAN. M.J.++. SEE. IB. OBERTEUFFER. J.A.ÍÍ. and RUSSELL. K.C" Treatment of steelplant effluents bv hitth gradient mannetic separation. Iron Steel Engr. vol. 53. no. I. 1976. pp. 4(M4.

MIHALIK. P. The election microprohe X-rav analysis..S.Afr. chem. Process., vol. 2. no. 2. Apr .-May 1967. pp. 37-J2.

MIHÁLIK. P. An aid for the alignment, positioning, and checking of the beam in the electron microprohe. I.ah. Practice, vol 19. no. 3. Mar. 1970. p. 288.

MIHÁLIK. P.. and HIEMSTRA. S.A. Apparatus permitting visual observation during the vacuum-deposition of thin films. I.ah. Practice, vol. 21. no. 4. Jan. 1972. pp. 29-30.

MIHÁLIK. P.. HIEMSTRA. S.A.. and DE VILLIERS. J.PR. Rustenburgite and atokite. two new platinum-group metals from the Mercnskv Reef. Bushvcld Igneous Complex. Can. Mineralogist, vol. 13, no. 2. 1975. pp. 146-150. MM PUBLICATIONS

MIHAI.IK. P.. JACOBSEN. J.B.E.*. and HIEMSTRA. S.A Platinum-croup minerals from a hydrothermal environment. Econ. Geol.. vol. 69. no. 2. Mar .-Apr. 1974. pp. 257-262.

MIHAI.IK. P.. and SAAGER. R. Chromite grains showing altered borders from the Basal Reef. Witwatersrand System Am. Mineralogist, vol. 53. no. «J/10. Sept.-Oct. 1968. pp 1543-1550.

MINNITT. RCA*. BUTTON. A *. and KABLE. E.J.D. The gold content of pre-Malmani argillaceous sediments in the Transvaal Supergroup, north-eastern Transvaal. University of the Witwatersrand. Economic Ge»..ogy Research Unit. Information Circular no. 82. Jul. 1973.

MRKUSIC. P.O.. SCIARONE. M . and SIMONSEN. HE. Gold recovery by cyanidation from mill products obtained after pvrite flotation/ S.Afr. Inst. Min. Metull.. vol. 70. no. 6. Pt 2. Jan. 1970. pp. 236-247.

NEEDES. C.R.S.. NICOL. M.J.. and FINKELSTEIN. N P. An electrochemical model for the leaching of uranium dioxide. 2. Alkaline carbonate media. LEACHING AND REDUCTION IN HYDROMETALI.URGY. Rurkin. A.R. leil). London. Institution of Mining and Metallurgy. 1975. pp. 12-19.

NEEDES. C.R.S.. NICOI. Ml. FINKELSTEIN. N.P.. and ORMROD. G.T.W. The industrial application of a uranium dioxide electrode. J. S.Afr. Inst. Min. Metall.. vol. 76, no. 4. Nov. 1975. pp. 23K-246.

NICOL. M.J. The new electrochemistry and its part in a new technolocv. Probe 11-2. 1972. pp. 23-26.

NICOL, M.J. An electrochemical investigation of the dissolution of copper, nickel, and copper-nickel allovs in ammonium carbonate solutions. J. S.Afr. Inst. Min. Metall.. vol. 75. no. 11. Jun. 1975. pp. 291-302.

NICOI.. M.J. Mechanism of aqueous reduction of chalcopyrite bv copper, iron and lead. Trans. Inst. Min. Metall.. vol. 84. 1975. pp. C206-C209.

NICOI.. M.J.. and NEEDES. C.R.S. The anodic dissolution of uranium dioxide. 1. In perchlorate solutions. Eleetrochim. Acta. vol. 20. no. 8. Aug. 1975. pp. 585-589.

NICOI.. M.J.. NEEDES. C.R.S.. and FINKELSTEIN. N.P. An electrochemical model for the leaching of uranium dioxide I. Acid Media. LEACHING AND REDUCTION IN HYDRO-METALLURGY. Burkin. A.R. led.). London. Institution of Mining and Metallurev. 1975 pp. I-II.

ORMROD. G.T.W. The control of aqueous ammonia concentrations by a thermal method. Electron. Instriirnn. vol. 6. no. 8. Aug. 1975. pp. 73. 77. 79.

ORMROD. (i.T.W. The control of aqueous ammonia concentrations bv a thermal method. J. CHEMSA. Dec 1975. pp 284-286

OSSIN. D.I.. HOW AT. D.D.'.and JOCHENS. PR. Liquidus temperatures, viscosities and electrical conductivities of lime-containinc slacs produced during the smelting of high-carbon ferrochromium and fcrrochromium-silicide allow 29th ELECTRIC EURNACE CONFERENCE PROCEEDINGS Metallurgical Society of AIME. New York. AIME. 1972. vol. 29 pp. «4-100.

OVERBEEK. P.W. An assessment of the efficiency of the Dryflo concentrator by the use of specific gravity markers. J. S.Afr. Inst. Min. Metall.. vol. 76. spec, issue. Oct. 1975. pp. 120-122.

PALMER. I.. PALMER. R.. and STEELE. TAV. The separation of platinum, palladium, rhodium and cold from ores and concentrates bv aqua regia extraction and bv high-temperature chlorinalion ollowed b> acid leaching../. S.Afr. Cliem. Inst I. vol. 25. no. 3. 1972. pp. 190-197.

PAUL. R.L.. and BROOKS. H.C.+ Energies of mixing of molten silver bromide-alkali bromide system, Inorg. nuel. Client. Lett., vol. 8. no. 7, 1972. pp. 629-631.

ii. MM PI BI It ATIONS

PAUL. R.L.. and BROOKS. H.C.* Binary silver bromide-alkali bromide melts. Calculated and measured energies of mixing. Inorg. Chem.. vol. 13. no. 3. 1974. pp. 683-690.

PAYNTER. J.C A review of copper hvdrometallurgv../. S.Afr. Inst. Min. Metall.. vol. 74, no. 4. Nov. 1973. pp. I5K-170.

PAYNTER. J.C.. LOVEDA Y. B.K.. and ROBINSON. CO. Optimization studies on the design of a processing plant for a large mining venture. -4 PPLICA TION OF COMPUTER METHODS IN THE MIX ERA L INDUSTRY. Salomon, M. D. G.. and Lancaster. F. H. (eds). Johannesburg. South African Institute of Mining and Metallurgy. 1973. pp. 171-176.

PEARTON. D.C.G.. BRECKFNRIDGE. R.L.. DUBOIS. M.. and STEELE. T.W. The pressure dissolution of platiniferous materials by the sealed-tube technique and the analysis of the resulting solutions. J. S.*fr. Chem. Inst., vol. 25. no. 3. 1972. pp. 244-253.

PEARTON. D.C.G.. and TAYLOR. J.D. The determination of copper in rocks and ores by atomic absorption spectroscopy. Bull. S.Afr. Inst. Assayers Analysts, no. 4. Jul. 1969.

PEARTON. D.C.G.. TAYLOR. J.D.. FAURE. P.K.. and STEELE. T.W. The determination of vanadium in silicate materials bv atomic absorption spectrophotometry. Analxt. chim. Acta% vol. 44. 19b9. pp. 353-359.

PHILIP. H.I.. and NICOL. M.J. Underpotential deposition and its relation to the anomalous deposition of metals in alleys. J. Elearoanalyt. Chem.. vol. 70. 1976. pp. 233-237.

POHLANDT. C. COOK. E.B.T., and STEELE, T.W. Determination of small quantities of \anthate. Talanta. vol. 16, no. S. 1969. pp. I 129-1135.

POHLANDT. C, ROBERT. R.. VALLÉE. A.M., and STEELE. T.W. The separation of non-volatile noble metals on cellulose, and the application of the technique to the analysis of matte-leach residues. J. S.Afr. Chem. Inst., vol. 25. no. 3. 1972. pp. 198-213.

POHLANDT. C. and STEELE. T.W. Separation of the non-volatile noble metals by reversed-phase extraction chromatography. Talanta. vol. 19. no. 7. 1972. pp. 839-850.

POHLANDT. C. and STEELE. T.W. Chromatographic separation and determination of noble metals in matte-leach residues. Talanta. vol. 21. 1974. pp. 919-925.

POPE. L.E.. and BOEYFNS. J.C.A. Crystal structures of S-benzylisothiouronium hexachloroplatinate(iv) and tetrachloroaurate(lli). J. Crystal Mol. Struct., vol. 5. no. I. 1975. pp. 47-5K.

RASMUSSFN. S.F.. SELI.SCHOP. J.P.F.*. FESO. H.W.*. and HAWKINS. DM.* Characterization of sedimentary strata using trace element patterns. PROCEEDINGS TWELFTH INTERNATIONAL SYMPOSIUM ON THE APPLICATION OF COMPUTERS AND MATHEMATICS IN THE MINERALS INDUSTRY. Johnson. T.B.. and Gentry. T.W. (eds). Colorado. Colorado School of Mines. 1°74. pp. D4I-D56.

RENNIE. M.S.. HOWAT. P.D.*. and JOCHENS. P.R. The effects of chromium oxide, iron oxide, and calcium oxide on the liquidus temperatures, viscosities, and electrical conductivities of slags in the

system MgO-Al.O;-SiO. ./. S.Afr. lint. Min. Metall.. vol. 73. no. I. Aug. 1972. pp. 1-9.

ROBERT. R.V.D.. VAN WYK. E.. PALMER. R.. and STEELE. T.W. The development of a fire-assay procedure using nickel sulphide as the collector for the noble metals. J. S.Afr. Chem. Inst.. vol. 25. no. 3. 1972. pp. 179-189.

ROBINSON. R.F The fifth fames Moir memorial lecture. S.Afr. chem. process.. Jun.-Jul. 1967. pp. CP72-(TH4.

ROBINSON. RE Would voti encourage vour son to undertake a mining career? Coal, yiold base Miner., vol. 19. no. 3. May 1971. pp. 1V-27.

r MM PUBLICATIONS

ROBINSON. RE. The utilization and conservation of mineral resources. S.Afr. J. Sci.. vol. 68. no. 4. Apr. 1972. pp. 105-110.

ROBINSON. RE The case for national research in mineral processing. J. S.Afr. Inst. Slin. Metull.. vol. 76. no. 3. Oct. 1975. pp. 196-213.

ROBINSON. R.E. Metallurgical prob ems in the utilization of Southern Africa's resources. RESOURCES OF SOUTHERN AF ICA TODAY AND TOMORROW. Baker. G. let!.). Johannesburg. Associated Scientific and Technical Societies of Southern Africa. 1976. pp. 308-318.

RUSSELL. B.G. Flame-photometric determination of sodium and potassium in manganese ores. Analyst, l.ond.. vol. 91. no. 1085. Aug. 1966. pp. 511-519.

RUSSELL. B.G.. and DOMEL. G. The analysis of uranium by X-ray-fluorescence techniques. Bull. S.Afr. Inst. Assayers Analysts, no. 6. Jan. 1970.

RUSSELL. B.G.. EDDY. B.T.. BECKMANN. G.. and STEELE. T.W. The applicatior of X-rav-fluoresc:nce techniques to the determination of the noble metals. J. S.Afr. Chem. Inst., vol. 25. no. 3. 1972. pp. 297-310.

RUSSELL. B.G.. SPANGENBERG. J. . and STEELE. T.W. An investigation into the use of platinum ware for silicate analysis. Talanta. vol. 16. no. 4. 1969. pp. 487—496.

RUSSELL. B.C.. WILSON. A.. LUBBE. M.V.. JONES. E.. TAYLOR. J.D.. and STEELE. T.W The determination of selenium and tellurium in silver chloride and uranium oxide. Talanta, vol. 14. no. 8. Aug. 1967. pp. 957-966.

SCHWELLNUS. J.S.I.'. HIEMSTRA.S.A. andGASPARRINI. E. The Merensky Reef at the Atok Platinum Mine and its environs. Econ. Geol., vol. 71. 1976. pp. 249-260.

SAAGER. R.. and MIHÁLIK. P. Notes on two varieties of pyrite from the Basal Reef of the Witwatersrand System. Econ. Geol.. vol. 62. 1967. pp. 719-731.

SCOTT. P.D.. GLASSER. D*. and NICOL. M.J. Thermal determination of the kinetics of the iron(ni)- tin(il) redox reaction in chloride solution. J. Chem. Soc, Farad. Trans. I. vol. 71. no. 7. 1975. pp. 1413-1421.

SCOTT. P.D.. WILLIAMS. D.F.*. and GLASSER. D.* The thermal determination of liquid phase kinetics. S.Afr. J. Sci.. vol. 70. no. I. 1974. pp. 10-12.

SEE, J.B. The development of fundamental and applied research in the sphere of ferro-allovs in South Africa. FERROALEACONES: TECNOLOGIA YDISPONIBILIDAD. Instituto Latinoamericano del Fierro y el Acero. Santiago. Instituto. 1975. pp. TI-T19. (In Spanish.)

SEE. J.B. Fluorspar and fluorine compounds in high-temperature smelting and refining of metals. Miner. Sci. Engn$, vol. 8. no. 4. Oct. 1976. pp. 217-241.

SELLSCHOP. J.P.F.*. BIBBY. DM.. ERASMUS. C.S.. and M1NGAY. D.W. Determination of impurities in diamond by nuclear methods. DIAMOND RESEARCH 1974. London. Industrial Diamond Information Bureau. 1974. pp. 43-50.

SOMMER. G. Temperature measurement with thermocouples. Electron. Instrumn. vol. 2. no. 1. Apr. 1971. pp. 2-5.

SOMMER. G. Less hands in uranium extraction. Nucl. Active. Jul. 1973. pp. 16-19.

SOMMER. G.. and JOCHENS. P.R. Techniques of micro-thermal analysis based on a thermocouple as heating source and specimen holder. Miner. Sci. Engng. vol. 3. no. I. Jan. 1971. pp. 3-16.

SOMMER. G.. JOCHENS. PR., and HOW AT. D.D.* Solid slate circuitry for a microdifferential thermal analyser. J. Phys. E; scienl. Instrum., vol. I. 1968. pp. 1116-1118. NIM PUBLICATIONS

SOMMER. G.. and MILLER, R.p. A hot stage microscope incorporating a differential thermal analysis unit./, scient. Instrum., vol. 43, no. 5. May 1966. pp. 293-297.

SOMMER. G.. ORMROD. G.T.W.. and CHAIX, R.P. Automation of uranium processing plants. Electron. Instrumn, vol. 3. no. 10. Jan. 1973. pp. 9, 11. 13. 15, 17, 19, 21.

SOMMER. G.. ORMROD, G.T.W.. and CHAIX, R.P. Recent developments in the instrumentation and automation of uranium-processing plants. J. S.Afr. Inst. Min. Metall., vol. 73, no. 12. Jul. 1973. pp. 413-420.

SOMMER. G.. and SANDER. H.W. Balanced temperature analysers. 2nd INTERNATIONAL CONFERENCE ON THERMAL ANALYSIS, 1968. Schwenker, R.F., and Gam, P.D. (eds). New York. Academic Press. 1969. vol. 1. pp. 163-175.

STANKO. J.S., and JOCHENS. PR. Ferro-alloy industry looks to big coal supply. Coal, Gold base Miner., vol. 23, no. 4. Jul. 1975. pp. 51. 55, 57, 58. 63. 64.

STANLEY. G.G. Mechanism in the autogenous mill and their mathematical representation. J. S.Afr. Inst. Min. Metall., vol. 75. no. 4. Nov. 1974. pp. 77-98.

STANLEY. G.G. Considerations in the application of autogenous milling./. S.Afr. Inst. Min. Metall., vol. 76. spec, issue. Oct. 1975. pp. 53-55.

STEELE. T.W. and GUERIN. B.D. A new graphite rod for flameless atomic-absorption spectroscopy. Analyst, vol. 97. no. 1150. Jan. 1972. p. 77.

TUNLEY. T.H.. KOHLER. P.f, and SAMPSON, T.D.I The Metsep Process for the separation and recovery of zinc, iron, and hydrochloric acid from spent pickle liquors./ S. Afr. Inst. Min. Metall., vol. 76, no. 10. May 1976. pp. 423-427.

UKEN, E-A. Neutron-activation analysis. Miner. Sci. Engng, vol. 2, no. 2. Apr. 1970. pp. 24-34.

UKEN, E-A., WATTERSON, J.J W., KNIGHT, A., and SELLSCHOP, J.P.F.* The determination of gold in ores and solutions by activation analysis with a neutron generator. Int. J. appl. Rad. Isotopes, vol. 19. 1968. pp. 615-623.

UKEN, E-A., WATTERSON, J.W.. KNiGHT, A., and STEELE, T.W. The application of neutron activation analysis to sorting Witwatersrand gold-bearing ores. J. S.Afr. Inst. Min. Metall, vol. 67, no. 3. Oct. 1966. pp. 99-114.

UKEN, E-A.. and WILLIAMSON, J.E. Radioactivity build-up of freshly separated radium from the uranium, actinium and thorium series. Radiochim. Acta, vol. 8, no. 1. 1967. pp. 60-63.

UROUHART. R.C. The production of high-carbon ferrochromium in a submerged-arc furnace. Miner. Sci. Engng, vol. 4, no. 4. Oct. 1972. pp. 48-65. UROUHART, R.C., JOCHENS. PR., and HOW AT, D.D.* The dissipation of electrical power in the burden of a submerged-arc furnace. 31st ELECTRIC FURNACE CONFERENCE PROCEEDINGS. Metallurgical Society of AIME. New York, AIME, 1973. vol. 31. pp. 29-48.

UROUHART. R.C.. JOCHENS. PR., and HOW AT. D.D.' A laboratory investigation of the smelting mechanisms associated with the production of high-carbon ferrochromium. INFACON 74 Glen.H. (ed.). Johannesburg. South African Institute of Mining and Metallurgy, 1975. pp. 195-205.

UROUHART. R.C..RENNIE, M.S.. and RABEY.C.C. The smelting of copper-nickel concentrates in an electric furnace. THE EXTRA CTIVE MET A Ll.URGY OF COPPER. Yannopoulos, Y., and Agarwal, J. (eds). New York. AIME. 1976. vol. 1. pp. 274-295.

VAN RENSBURG. W.C.J. Changing patterns in the World's supply of minerals. Miner. Sci. Engng, vol. 6, no. 3. Jul. 1974. pp. 142-153.

4'l MM Pl'BUCATIONS

VON RAHDEN. H.V.R. Apparent fineness values of gold from two Witwatersrand gold mines. Ecnn. GeoL. vol. 60, 1965. pp. 980-997.

VON RAHDEN, H.V.R. A modified halide-disc holder for infrared spectrometry. J. scientific' lustrum., vol. 44. 1967. p. 168.

VON RAHDEN. H.V.R., and DICKS. L.W.R. Descloizite. mottramite. and vanadinite from South West Africa-an infrared and X-rav study. Am. Mineralogist, vol. 52. Jul.-Aug. 1967. pp. 1067-1076.

WARREN. G.F. JOCHENS. PR., and HOW AT. D.D.* Liquidus temperatures and the activities of manganese!II) oxide in slags associated with the production of high-carbon ferromanganese alloys. ISFACOS 74. Glen. H. (ed.). Johannesburg, South African Institute of Mining and Metallurgy. 1975. pp. 175-185.

WARSHAWSKY. A. The liquid-liquid extraction of nickel: a review. Miner. Sci. Ent>nj>. vol. 5. no. I. Jan. 1973. pp. 36-52.

WARSHAWSKY. A. Solvent-impregnated resins in hvdrometallurgical applications. Trans. Instn Min. Metall.. vol. 83. no. 811. Jun. 1974. pp. C101-CÍ04.

WARSHAWSKY, A. Polystyrenes impregnated with B-diphenylglyoxime. a selective reagent for palladium. Taltinta. vol. 2Í. no. 6. 1974. pp. 624-626.

WATTERSON. J.I.W. Optimization of irradiation and decay times in nuclear activation analysis./. Radioanakt. Chem.. vol. 26. 1975. pp. 135-150.

WATTERSON, J.I.W.. and HAWKINS. DM.* Multivariate techniques for the classification of cranites. PROCEEDINGS TWELFTH INTERNATIONAL SYMPOSIUM ON THE APPLICATION OF COMPUTERS AND MATHEMATICS IN THE MINERALS INDUSTRY. Johnson. T.R.. and Gentry, D.W. (eds). Colorado. Colorado School of Mines. 1974. pp. D57-D76.

WETHMAR. J.C.M.. HOW AT. D.D.*. and JOCHENS. PR. Phase equilibria in the Cr-Fe-Si-C Nvstcm in the composition range representative of high-carbon ferrochromium alloys produced in South Africa. J. Metall. Sci.. vol. 9. 1975. pp. 291-296.

WETHMAR. J CM.. HOWAT. D.D.*. JOCHENS. PR., and STRYDOM O.A.W * Liquidus temperatures in the Cr-Fe-Si system in the composition range representative of ferrochromium-silicide produced in South Africa./ S.Afr. Inst. Min. Metall., vol. 73,no. 6. Jan. 1973. pp. 181-183.

WOODBURN. E.T.+. KING. R.P.. BUCHALTER. EM., and PIPER. S.E. Integrated grinding and flotation control-computational problems in an optimum decision making model. A DECADE OF DIGITAL COMPUTING IN THE MINERAL INDUSTRY. Weiss, A. {ed.). New York. AIME. 1969. pp. 695-728.

WOODBURN. E.T.+. KING. R.P.. and COLBORN. R.P.t The effect of particle size distribution on the performance of a phosphate flotation process. Metall. Trans., vol. 2. no. 11. Nov. 1971. pp. 3163-3174.

WOOLI.ACOTT. L.C.*. HOWAT. D.D.*. and JOCHENS. PR. The viscosities and electrical conductivities of slags associated with the production of high-carbon ferromanganese alloys. INF AC ON 74. Glen, H. led.). Johannesburg. South African Institute of Mining and Metallurgy. 1975. pp. 227-232.

ZANDERS. J.A.J. Single-ended differential instrumentation amplifier. Electron. Instrumn. vol. 4. no. II. Mar. 1974. pp. 2-3.

/ANDERS. J.A.J. An electronic differential precision thermometer. Electron. Instrumn. vol. 4. no. 12. Apr. 1974. pp. 24-25. 28. NIM PUBLICATIONS

ZANDERS. J. A J.. BIBBY. DM., and RASMUSSEN. S.E. A simple automatic sample charger for the eamma-rav counting of reactor-irradiated samples. J. Phvs. E: scient. Instrum.. vol. 6. 1973. pp. W3-975.

* University of the Witwatersrand + University of Natal + Atomic Energy Board § U.S. Geological Survey * Woodall-Duckham S.A. (Pty) Ltd Israel Institute of Technology. Haifa ** Kennecott Copper Corporation. U.S.A. ++ Blyvooruitzicht Gold Mining Co. Ltd +Í Massachusetts Institute of Technology. Cambridge. U.S.A. §§ Robor Limited ' Róssing Uranium. Ltd r Rio Tinto South Africa Ltd " Sala Magnetics Ltd. Cambridge, U.S.A. " Anglo-Transvaal Consolidated Investment Co. Ltd ' Samancor Management Services (Pty) Ltd ~i r NIM PUBLICATIONS

4. NIM PATENTS

The patents are arranged chronologically according to the date on which they were first registered. Copies are not available from NIM but can be obtained from The Patent Office, 25 Southampton Buildings, London WC2A 1AY, England.

L J MM PUBLICATIONS

Title of patent Country Patent no Date Term in years

Extraction of copper South Africa 67 2047 3-4-68 16 Rhodesia 133'M>,5K S-4-68 16 South West Africa PhS 041 S-4-68 14 Zambia Z.3U68 5-4-68 16 Canada S5K.4?; 8-4-68 21 Comto Republic S3?, A I6-4-6S 20 Chili 25.464 JtV4-f>*s 17

Apparatus and method lor Great Britain 1.240.897 1 7-9-68 16 differential thermal West Germany P. 17 98 283.1 20-9-69 14 analysis South Africa «7/5680 16-10-68 16 U.S.A. 3.675.465 7-10-69 20

Physical separation of materials South Africa 70/2765 24-4-70 16

Improvements in and relating South Africa 69/5623 28-8-70 16 to the contacting of liquids South West Africa 70/0100 28-8-70 14 and particulate solids

Contacting liquids South Africa 71/3140 14-5-71 16 and solids South West Africa 72/0052 5-5-72 16

Contacting liquids and solids South Africa 71/3139 14-5-71 16 in countercurrent Rhodesia 200/72 5-5-72 20 South West Africa 72/0051 5-5-72 16 USA 3.957.635 8-5-72 21 Great Britain 1.399.473 11-5-72 16 Belgium 783.407 12-5-72 20 Canada 978.722 12-5-72 20 France 72 17146 12-5-72 20 Italy 955497 13-5-72 15 Luxembourg 65.371 16-5-72 20 Australia 472.709 17-5-76 16

Chloride solutions containing South Africa 70/8558 8-12-71 16 mixed metal chlorides South West Africa 71/0130 8-12-71 14

Relating to the recovery South Africa 71/0048 28-12-71 16 of zinc from ores

Recovery and separation of platinum South Africa ""1/4981 21-7-72 16 group metals and gold

Separation and purification of platinum South Africa 72/0308 27-12-72 16 group metals and gold Rhodesia 521/72 27-12-72 20 Great Britain 1.418.391 2-1-73 16 France 73 01418 16-1-7.3 20 Hal> 976.937 1K-1-73 15 South West Africa 73/084 20-8-7.3 14

Equipment for contacting South Africa 72/4328 20-6-73 16 liquids and solids

Improvements in equipment for South Wen Africa 73/064 20-6-73 14 contacting liquids and solids

Improved method of measuring South Africa 72/8807 8-1-74 16 rates of dissolution South West Africa 74/7 8-1-74 14

Improvements relating to South Africa 73/1213 21-2-74 16 the controlling of processes

The production of ferrochromium alloys South Africa 72/6389 19-3-74 16

The separation of platinum group metals South Africa 74/5109 23-7-75 16 and gold Belgium 832 216 7-8-75 20 France 75 24681 7-8-75 20

A process for the treatment of mixtures South Africa 75/0593 5-1-77 16 of platinum group metals and gold Belgium 838.029 29-1-76 20 NIM PUBLICATIONS

5. CLASSIFICATION OF NIM PUBLICATIONS ACCORDING TO PROGRAMME

The publications are listed under each programme in the following order: reports, papers, patents. Copies of most of the reports ;.re obtainable from the National Institute for Metallurgy. Private Bag X3015. Randburg. 2125 South Africa. For those reports that are out of print, photocopies can be supplied at a nominal charge. The papers and patents are not available from NIVI: the papers can he consulted in the journals or books in which they were published, and the patents are obtainable from the Patent Office. 25 Southampton Buildings. London WC2A I AY. England.

54 MM PUBLICATIONS

Programme No. 001

Fundamental metallurgical studies of ferro-alloy processes and the application of results to operating plants I. Reports

429 The determination of chromium in chromite 1968

511 The determination of silica in chrome ores and chrome refractories 1969

853 The determination of silicon in ferrochrome alloys 1970

952 The analysis of ferrochrome slag 1970

1020 Phase relationships involving iron, chromium, silicon, and carbon, with special reference to high-carbon ferrochromium and ferrochromium-silicide alloys. A literature survey 1970

1343 The Pyrometallurgical Research Group's current research programme on ferro-alloys 1971

1365 Studies of incipient fusion in the system chromite-MgO-Al203-Si02-C 1972

1366 Liquidus temperatures, viscosities, and electrical conductivities of lime-containing slags produced during the smelting of high-carbon ferrochromium and ferrochromium-silicide alloys 1971

1394 The determination of ferrous iron in chromites and chromium ores 1972

1423 The effects of chromium oxide, iron oxide, and calcium oxide on the liquidus temperatures, viscosities, and electrical conductivities of slags in the system

MgO-AI20,-Si02 1972

1457 Phase equilibria in the Cr-Fe-Si-C system in the composition range representative of high-carbon ferrochromium alloys produced in South Africa ] 972

1458 Liquidus temperatures in the Cr-Fe-Si system in the composition range representative of ferrochromium-silicide alloys produced in South Africa 1972

1463 Liquidus temperatures and activities of manganese(ll) oxide in slags associated with the production of high-carbon ferromanganese alloys ] 972

1482 Reactions occurring during the smelting of high-carbon ferrochromium from Transvaal chromite ores 1973

1547 Physicochemical and thermodynamic properties of slags in the system MgO-A)0,.-,-SiOj 1973

1548 Physicochemicjl properties of slags in the system MgO-AljO^-SiOj and their application to the technology of ferro-alloy smelting 1973

1549 Thermodynamic and related physicochemical factors pertaining to the production of ferromanganese. A literature survey 1973

íí NIM PUBLICATIONS

1606 The electrical-resistance characteristics of the charge in the electric reduction

furnace 1974

1622 The electrical conductivity of the charge in a ferrosilicon furnace 1974

1681 The determination of sulphur and phosphorus in chromite 1975

1687 The viscosities and electrical conductivities of slags associated with the

production of high-carbon ferromanganese alloys 1975

1698 Measurement of the electrical resistance of ferrochromium furnace charges 1975

1707 The work of the Pyrometallurgy Research Group at the University of the

Witwatersrand 1975

1724 The preparation and reduction of chromite pellets containing a reducing agent 1975

1769 An evaluation of the low-pressure ammonia-ammonium sulphate system for the leaching of local base-metal sulphides 1976 1770 The spectrophotometric determination of vanadium in chromium-bearing materials 1975 1790 The rapid determination of manganese, vanadium, and aluminium by instrumental neutron-activation analysis 1976

1791 A motivation for a pyrometallurgical pilot plant 1976

IK33 Effective thermal conductivities of packed beds of chromite ores 1976

1868 The reduction of fluxed and non-fluxed manganese ores by ferromanganese silicide 1977 2. Papers BARCZA. N. A.. JOCHENS. PR., and HOWAT, D.D. The mechanism and kinetics of reduction of Transvaal chromite ores. 29th ELECTRIC FURNACE CONFERENCE PROCEEDINGS. Metallurgical Society ofAlME. New York, AIME, 1972. vol. 29. pp. 88-93. CHANNON, W.P.. and SEE. J.B. The reduction of fluxed and non-fluxed manganese ores by ferromanganese silicide. / S.Afr. Inst. Min. Metall., vol. 77. no. 8.

COALE. R.D., WOLHUTER. C.W., JOCHENS. PR., and HOWAT, D.D. Cementitious properties of metallurgical slags. Chem. Concr. Res., vol. 3, no. 1. 1973. pp. 81-92.

DE VILLIERS, J.P.R. The crystal structure of braunite with reference to its solid-solution behaviour. Amer. Mineralogist, vol. 60. 1975. pp. 1098-1104.

JOHNSTON. G.H.. JOCHENS. PR., and HOWAT. D.D. Physicochemical properties of slags in the system MgO-AI2O,-Si0.. and their application to the technology of ferro-alloy smelting. INFACON 74. Glen, H. fed.). Johannesburg, South African Institute of Mining and Metallurgy, 1975. pp. 217-225.

OSSIN. D.I.. HOWAT. D.D.. and JOCHENS. PR. Liquidus temperatures, viscosities and electrical conductivities of lime-containing slags produced during the smelting of high-carbon ferrochromium and ferrochromium.silicide alloys. 29th ELECTRIC FURNACE CONFERENCE PROCEEDINGS. Metallurgical Society of AIME. New York, AIME. 1972. vol. 29. pp. 94-100. N1M PUBLICATIONS

RENNIE. M.S., HOW AT. D.D., and JOCHENS, PR. The effect of chromium oxide, iron oxide and calcium oxide on the liquidus temperatures, viscosities, and electrical conductivities of slags in the system MgO-AliC-SiOj. J. S.Afr. Inst. Min. Metall, vol. 73. no. 1. Aug. 1972. pp. 1-9.

SEE, J.B. The development of fundamental and applied research in the sphere of ferro-alloys in South Africa. FERROALEACONES: TECNOLOGIA YD1SPOSIB1LIDAD. lnstituto Latinoamericano del Fierro y el Acero. Santiago, Instituto, 1975. pp. T1-T19. (In Spanish.) URQUHART, R.C. The production of high-carbon ferrochromium in a submerged-arc furnace. Miner. Sci. Engng. vol. 4, no. 4. Oct. 1972. pp. 48-65.

URQUHART, R.C., JOCHENS. PR., and HOW AT, D.D. A laboratory investigation of the smelting mechanisms associated with the production of high-carbon ferrochromium. INFACON 74. Glen,H. (ed.). Johannesburg, South African Institute of Mining and Metallurgy, 1975.pp. 195-205. WARREN, G.F., JOCHENS, PR., and HOW AT, D.D. Liquidus temperatures and the activities of manganese(ll) oxide in slags associated with the production of high-carbon ferromanganese alloys. INFACON 74. Glen, H. (ed.). Johannesburg, South African Institute of Mining and Metallurgy, 1975. pp. 175-185.

WETHMAR, J.C.M., HOW AT, D.D., and JOCHENS, PR. Phase equilibria in the Cr-Fe-Si-C system in the composition range representative of high-carbon ferrochromium alloys produced in South Africa/ Metall. Sci., vol. 9. 1975. pp. 291-296. WETHMAR, J.C.iVi., HOWAT, D.D., JOCHENS, PR., and STRYDOM, O.A.W. Liquidus temperatures in the Cr-Fe-Si system in the composition range representative of ferrochromium-silicide produced in South Africa../. S.Afr. Inst. Min. Metall., vol. 73, no. 6. Jan. 1973. pp. 181-183.

WOOLLACOTT, L.C., HOWAT, D.D., and JOCHENS, PR. The viscosities and electrical conductivities of slags associated with the production of high-carbon ferromanganese alloys. INFACON 74. Glen, H. (ed.). Johannesburg, South African Institute of Mining and Metallurgy, 1975. pp. 227-232.

Programme No. 002

Development of new and improved ferro-alloy processes for the major ferro-alloys (ferrochromium, ferromanganese, ferrosilicon)

I. Reports

378 A literature survey on the manufacture of ferrochrome 1968

447 Chemical beneficiation and agglomeration of low-grade chromite ores - a literature survey 1969

1247 The pelletizing of chromite fines. A preliminary investigation of the preparation of cold-bonded pellets 1971

1398 The peptization of chromite fines. Preparation of pellets bonded with

bentonite and indurated by heat treatment. 1971

1489 The breakage of Soderberg electrodes 1972

1499 The production of medium-carbon ferrochromium 1972

1513 The upgrading of chromite ore from Moreesburg 1973

<7 N1M PUBLICATIONS

1544 The recovery of salable ferrochromium from material discarded by Ferrometals Limited 1973

1650 The production of medium-carbon ferrochromium alloys by solid-state reduction 1974

1708 At. examination of the suitability of various reducing agents for the production

of ferrochromium 1975

1724 The preparation and reduction of chromite pellets containing a reducing agent 1975

1769 An evaluation of the low-pressure ammonia-ammonium sulphate system for the leaching of local base-metal sulphides 1976 1791 A motivation for a pyrometallurgical pilot plant 1976

2. Papers

McRAE, L.B., and SELMER-OLSEN, S.S. An investigation into the pelletizing and prereduction of Transvaal chmmixes. AGGLOMERATION 77. Sastry.K.V.S. fed). New York, AIME, 1977. vol. 1. pp. 356-377.

SEE. J.B. The development of fundamental and applied research in the sphere of ferro-alloys in South Africa.FERROALEACONES: TECNOLOGIA Y DISPON1B1LIDAD. Instituto Latinoamericano del Fierro y el Acero. Santiago. Instituto, 1975. pp. T1-T19. (In Spanish.)

3. Patent

The production of ferrochromium alloys. S.Afr. Pat. 72/6389. 19th Mar., 1974.

Programme No. 003

Instrumentation, optimization, and control of ferro-alloy processes I. Report

1818 A microprocessor-based system to control the feed to a ferro-alloy furnace 1976

Programme No. 004

Research and development of stainless-steel processes

2. Paper McNALLAN. M.J., SEE. J.B., OBERTEUFFER, J.A.. and RUSSELL, K.C. Treatment of steelplant effluents by high gradient magnetic separation. Iron Steel Engr, vol. 53. no. 1. 1976. pp. 4(M4.

5X N1M PUBLICATIONS

Programme No. 005

Research associated with conventional processes for the production of iron and steel

I. Report

1425 The effect of the reactivity of lime on desulphurization efficiency in the basic oxygen furnace 1972

2. Papers

HEJJA. A A.. HOWAT. D.D.. and JOCHENS. PR. The effect of the reactivity of lime on desulphurization efficiency in the basic oxygen furnace./ S.Afr. Inst. Min Me tall., vol. 73. no. 8. Mar. 1973. pp. 249-257.

McNALLAN. M.J.. SEE. J.B.. OBERTEUFFER. J.A.. and RUSSELL. K.C. Treatment of steelplant efluents by high gradient magnetic separation. Iron Steel Engr, vol. 53, no. 1. 1976. pp. 40-44.

Programme No. 006

Research and development of processes for minor ferro-alloys

I. Report

1777 Ferro-alloys in Brazil 1976

Programme No. 008

Properties of carbonaceous reducing agents with special reference to ferro-alloy processes 1. Reports

1566 Comparative tests on coke. char, and anthracite 1973

1708 An examination of the suitability of various reducing agents for the production of ferrochromium 1975

2. Paper

STANKO. J.S., and JOCHENS. PR. Ferro-alloy industry looks to big coal supply. Coal, Gold base Miner., vol. 23. no. 4. Jul. 1975. pp. 51, 55, 57, 58, 63, 64.

Programme No. 009

Development of processes for the production of chromium metal and chemicals

I. Report

1790 The rapid determination of manganese, vanadium, and aluminium by instrumental neutron-activation analysis 1976 NIM PUBLICATIONS

Programme No. 010

Development of processes lor the production of manganese metal

I. Report

1859 Increased current efficiency during electrodeposition of manganese from sulphate electrolytes 1976

Programme No. 050

Development of processes for the concentration of base metals, especially copper, zinc, lead, and nickel, by ore-dressing techniques with special reference to mixed sulphides

1. Reports

159 A radioactive-tracer technique for the study of the flotation of valleriite 1967

-18 Exploratory comminution and flotation tests to indicate some characteristics of valleriite 1967

1268 A two-stage process for the recovery of flotation concentrates from

copper-zinc ores 1971

1374 Flotation tests on copper-zinc ore from the Letaba district 1971

1384 Flotation tests on samples of Canadian copper-zinc ores 1971

1388 Flotation tests on samples of copper-zinc ores from Finland 1971

1587 A preliminary investigation of the flotation of copper-activated sphalerite

without the use of collectors 1973

1597 The role of sulphur in the flotation of sulphide minerals 1974

1613 The deactivation of copper-activated sphalerite with cyanide 1974

1721 A preliminary investigation into the mechanism of depression in the flotation

of sulphide minerals 1975

1785 Some thermodynamic aspects of systems relevant to the flotation of sphalerite 1976

1872 The determination of mercury by cold-vapour atomic-absorption spectrophotometry 1977 2. Papers ALLISON. S. A.. HARRIS. P.J.. and M ARSICANO. F. Depression and deactivation of sphalerite/ S.Afr. Irui. Min. Metall, vol. 76, spec, issue. Oct. 1975. pp. 123-124. MM PUBLICATIONS

BUSHELL. L.A. and VEITCH, M.L. The influence of chemical environment during milling on the flotation of zinc from complex sulphide ores. J. S.Afr. Inst. Min. MeialL, vol. 76. spec, issue, issue. Oct. 1975. pp. 143-145.

FINKELSTEIN. N.P.. and ALLISON. S. A. The chemistry of activation, deactivation and depression in the flotation of zinc sulphide: a review. FLOTATION. A.M. GAUDIN MEMORIAL VOLUME. Fuerstenau, M.C. (ed.f. vol. 1. New York. American Institute of Mining, Metallurgical and Petroleum Engineers. Inc., 1976. pp. 414-457.

Programme No. 051

Development of hydrometallurgical processes for base metals, especially copper, nickel, and cobalt, including non-sulphidic raw materials

I. Reports

28 Exploratory tests on the dissolution of manganese dioxide by reaction with sulphuric acid and a metallic sulphide 1966

SI The solvent extraction of copper cyanide 1966

84 Leaching tests on the copper sulphide mineral valleriite from Palabora Mining Company - a preliminary report 1966

154 The leaching of various copper minerals with dilute sodium cyanide and dilute solutions containing sulphuric acid and ferric ions 1967

155 The quantitative estimation of valleriite in the presence of other copper minerals 1967

157 Results of tests to obtain pure valleriite 1967

172 The solvent extraction of copper cyanide 1967

175 Copper extraction by leaching magnetites from Palabora Mining Company 1967

435 The liquid-liquid extraction of ferric thiocyanate complexes with Versatic911 1968

847 The liquid-liquid extraction of ferric thiocyanate complexes with carboxylic

acids 1969

938 Life test on IRA 400 resin during the recovery of zinc chloride 1970

964 The recovery of copper from sulphate leach liquors by liquid ion exchange with LIX-64N 1970 1078 The complexometric determination of zinc in ores and concentrates, with ion-exchange resin 1970 1085 The optimization of the design of a countercurrent liquid-liquid-extraction plant using LIX-64N 1970

1158 The production of ferric sulphate and sulphuric acid by the autoxidation process using the Fring's aerator 1970 MM PUBLICATIONS

1222 The liquid-liquid extraction of zinc from zinc chloride solutions by the use of

di-2-ethyl hexyl phosphoric acid 1971

15/5 The recovery of zinc from pickle liquors by ion exchange 1973

1630 An electrochemical investigation of the dissolution of copper, nickel, and copper-nickel alloys in ammonium carbonate solutions 1974 1685 The METSEP Process for the separation and recovery of zinc. iron, and hydrochloric acid from spent pickle liquors 1974

1693 Research at the National Institute for Metallurgy on the engineering aspects of copper electrowinning 1975

1711 The oxidation of aqueous solutions of ferrous sulphate in a bubble column 1975

1720 The initial development of processes for the direct leaching of iron-nickel-copper mattes containing platinum-group metals and for the production of ferronickel 1975

1769 An evaluation of the low-pressure ammonia-ammonium sulphate system for

the leaching of local base-metal sulphides 1976

1772 A study of copper recovery by the lime-roast leach process 1975

1776 The extraction of copper from copper-nickel catholyte by ion exchange 1975

1793 The kinetics of mechanism <>f solvent extraction of copper by LIX 64N and KELEX 100 1976 1796 The mechanism of the electrodeposition and dissolution of nickel from chloride

media 1976

1799 An electrochemical investigation of copper cementation on iron 1976

1804 The electrodeposition of nickel from ammoniacal solutions 1976

1H20 The thermodynamics of the formation of chlorocomplexes of iron*ill). cobaltdi). manganeseiID. and copperdD in perchlorate medium 1976 1858 The kinetics and mechanism of the non-oxidative dissolution of some iron sulphides in aqueous acidic solutions 1976

2. Papers

COLBORN. R.P.. and NICOL. M.J. An investigation inn the kinetics and mechanism of the oxidation of ironiilinv oxvgen in aqueous chloride solutions./ .i.Afr. Inst. Min. Metall., vol. 73. no. 9. Apr. 1975. pp. 281-289.'

HAINES. A.K.. TUNLEY. T.H.. TE RIELE. W A.M.. CLOETE. F.L.D.. and SAMPSON. T.D. The recovery of zinc from pickle liquors bv ion exchange. / S.Afr. Inst. Min. Metall., vol. 74. no. 4. Nov. 1973. pp. 149-157.

NICOL. M.J. An electrochemical investigation of the dissolution of copper, nickel, and copper-nickel alloys in ammonium carbonate solutions/ S.Afr. Inst. Min. Metall., vol. 75. no. II. Jun. 1975. pp. 291-302. NIM PUBLICATIONS

NICOL, M.J. Mechanism of aqueous reduction of chalcopyrite by copper, iron and lead. Trans. Inst. Min. Metall, vol. 84. 1975. pp. C206-C209. PAYNTER, J.C. A review of copper hydrometallurgy./. S.Afr. Inst. Min. Metall., vol. 74, no. 4. Nov. 1973. pp. 158-170.

PHILIP, H.I., and NICOL, M.J. Underpotential deposition and its relation to the anomalous deposition of metals in alloys. J. Electroanalyt. Chem., vol. 70. 1976. pp. 233-237. TUNLEY, T.H., KOHLER, P.. and SAMPSON, T.D. The Metsep Process for the separation and recovery of zinc, iron, and hydrochloric acid from spent pickle liquors./ S. Afr. Inst. Min. Metall., vol. 76. no. 10. May 1976. pp. 423-427. WARSHAWSKY, A. The liquid-liquid extraction of nickel: a review. Miner. Sci. Engng, vol. 5, no. 1. Jan. 1973. pp. 36-52.

WARSHAWSKY, A. Solvent-impregnated resins in hydrometallurgical applications. Trans. Instn Min. Metall., vol. 83, no. 811. Jun. 1974. pp. C101-C104.

3. Patents Extraction of copper. S.Afr. Pat. 67/2097.3rd Apr., 1968. (Also: Can. Pat. 858,472.8th Apr., 1968; Chile Pat. 25.464, 30th Apr., 1968; Congo Rep. Pat. 833/A, 16th Apr., 1968; Rhodes. Pat. 133/68/58, 5th Apr., 1968;S.W. Afr. Pat. P.68/041, 5th Apr., l968;Zamb. Pat. Z.31/68, 5th Apr., 1968.)

Chloride solutions containing mixed metal chlorides S Afr. Pat. 70/8558,8th Dec, 1971. (Also: S. W. Afr. Pat. 71/0130, 8th Dec, 1971.)

Equipment for contacting liquids and solids. S.Afr. Pat. 72/4328, 20th Jun., 1973.

Programme No. 053

Pyrometallurgical processes for the smelting and refining of copper and nickel

I. Reports

1484 Cost estimates for the production of copper wirebars from sulphidic ores 1972

1491 Technology and economics of the Claus kiln under South African conditions 1972

1527 The physicochemical properties of slags associated with the smelting of nickel

sulphide concentrates 1973

1628 The recovery of non-ferrous metals from a secondary blast-furnace slag 1974

1664 The smelting of copper-nickel concentrates in an electric furnace 1974

2. Paper UROUHART, R.C.. RENNIE, M.S., and RABEY, C.C. The smelting of copper-nickel concentrates in an electric furnace. THE EXTRACTIVE METALLURGY OF COPPER. Yannopoulos, Y„ and Agarwal, J.

61 NIM PUBLICATIONS

Programme No. 055

Development of hydrometallurgical processes for the recovery of zinc

I. Report

1782 The application of air-sparging techniques to industrial electrodeposition of zinc from acidic zinc sulphate solutions 1976

.?. Patents

Chloride solutions containing mixed metal chlorides. S.Afr. Pat. 70/8558,8th Dec, 1971. (Also: S. W. Afr. Pat. 71/0130. 8th Dec, 1971.)

Relating to the recovery of zinc from ores. S.Afr. Pat. 71/0048, 28th Dec. 1971.

Programme No. 056

Processing of nickel-bearing serpentinites with special reference to their occurrence in South Africa

I. Reports

8f> The investigation of six samples of serpentinite from the Barberton area 1966

88 Quantitative electron-microprobe investigation of the distribution of nickel in serpentinites and associated minerals and rocks from the Barberton area J9ftft

• 79 The nickel distribution in weathered serpentinites from Volspruit. Potgietersrus 1967

180 The distribution of nickel in a r^'-k sample from the Louis Moore Mine,

northern Transvaal 1967

291 Nickel minerals from Barberton. South Africa. 1. Ferroan trevorite 1968

344 Nickel minerals from Barberton: II. Nimite, a nickelian chlorite 1968

352 Nickel minerals from Barberton: III. Willemseite. a nickelian talc 1968

428 Nickel minerals from Barberton. South Africa: IV. Reevesite, a member of the hydrotalcite group 1968 508 The dis.ribution of nickel in serpentinite samples of borehole cores from the

Msauli Mine. Barberton 1969

512 The distribution of nickel in two surface samples of serpentinite 1969

536 The distribution of nickel in limonite-bearing birbirite and gossan from Vlakfontein and Gi oenfontein in the western Transvaal 1969 845 An electron-microprobe study of the nickel distribution in a serpentinite from Volspruit. Potgietersrus 1969

M MM PUBLICATIONS

848 The distribution of nickel in serpentinite from Lusinzi. north-eastern Transvaal 1969

897 Nickel in South Africa with special reference to low-grade nickeliferous ores 1970

1319 Nickel minerals from Barberton. V. Trevorite 1971

1356 Nickel in samples of serpentinite from Kaapsehoop, Barberton 1971

1732 A mineralogical examination of eight nickel-bearing rocks from the Grasvally Chromite Mine 1975

2. Papers

DE WAAL. S.A. On the origin of hvdrogrossularite and other calcium silicates in serpentinites. Trans. Geol. Soc. S.Afr., vol. 72, pt f. Jan.-Mar. 1969. pp. 23-27.

DE WAAL, S.A. Nickel minerals from Barberton. South Africa: I. Ferroan trevorite. Am. Mineralogist, vol. 54. no. 7/8. Jul.-Aug. 1969. pp. 1204-1208.

DE WAAL, S.A. Nickel minerals from Barberton, South Africa: II. Nimite, a nickel-rich chlorite. Am. Mineralogist, vol, 55. no. 1/2. Jan.-Feb. 1970. pp. 18-30.

DE WAAL, S.A. Nickel minerals from Barberton, South Africa. HI. Willemseite. a nickel-rich talc. Am. Mineralogist, vol. 55. no. 1/2. Jan.-Feb. 1970. pp. 31-42.

DE WAAL, S.A. South African nickeliferous serpentinites. Miner. Sci. Lngng, vol. 3, no. 2. Apr. 1971. pp. 32-45.

DE WAAL, S.A. Nickel minerals from Barbcrton, South Africa: V. Trevorite redescribed. Am. Mineralogist, vol. 57. no. 9/10. Sep.-Oct. 1972. pp. 1524-1527.

DE WAAL, S.A.. and CALK, L.C. Nickel minerals from Barberton. South Africa: VI. Liebenbergite. a nickel olivine. Am. Mineralogist, vol. 58. no. 7/8. Jul.-Aug. 1973. pp. 733-735.

DE WAAL. S.A.. and VI1.JOEN. E.A Nickel minerals from Barberton, South Africa: IV. Reevesite. a member of the hvdrotalcite group. Am. Mineralogist, vol. 56, no. 5/6. May-Jun. 1971. pp. 1077-1081.

DE WAAL. S. A. VILJOHN. E.A.. and CALK. L.C. Nickel minerals from Barberton. South Africa. VII. Bonaccorditc. the nickel analogue of ludwigite. Trans deal. Soc. S.Afr., vol. 77. pt 3. Sep.-Dec. 1974. p. 375.

Programme No. 057

Development of new and improved methods for the analysis of base-metal sulphide ores, concentrates, metals, and byproducts

I. Reports

29 The determination of selenium and tellurium in silver chlorite 1966

244 The determination of selenium and tellurium in silver chloride and uranium

compounds 1967

491 The determination of nickel, copper, and cobalt in a nickel alloy matte 1969

857 The volumetric determination of bismuth in metallurgical ores and concentrates 1969 N1M PUBLICATIONS

1230 The determination of copper and zinc in borehole cores with the Ekco Mineral Analyser 1971

1430 The use of the Ekco Mineral Analyser for the determination of copper and zinc in the presence of iron 1972

1435 The determination of chromium, manganese, iron, cobalt, and nickel by atomic-absorption spectrophotometry using the nitrous oxide-acetylene flame 1972 lf>88 The analysis of nickel-refining solutions: separation of trace elements by liquid-liquid extraction followed by atomic-absorption measurement 1974

1689 The determination by atomic-absorption spectrophotometry of arsenic, selenium, tellurium, antimony, and bismuth on ion-exchange resins 1974

1718 The determinatioii of silver in lead, copper, and zinc concentrates by instrumental neutron-activation analysis 1975

1736 The determination, by atomic-absorption spectrophotometry and liquid-liquid extraction, of antimony (parts per million) in ores and concentrates 1975

1746 The determination of minor elements in zinc, lead, and copper sulphide concentrates by atomic-absorption spectrophotometry 1975

1783 The spectrographs determination of minor and trace elements in copper, lead, and zinc concentrates 1976

1787 The determination, by atomic-absorption spectrophotometry, of trace elements in sulphide concentrates 1976

1792 The determination, by instrumental neutron-activation analysis, of some trace elements in sulphide ores and concentrates 1976

1794 The application of three-phase liquid-liquid extraction to the analysis of bismuth and tellurium in sulphide concentrates 1976

1797 A rapid-atomic absorption method for the determination of silver in sulphide ores and concentrates 1976

1798 Interferences in the determination, by atomic-absorption spectrophotometry, of copper, lead, and zinc in sulphide concentrates 1976

1815 The commissioning of an induction-coupled plasma system and its application to the analysis of copper, lead, and zinc concentrates 1976

1836 The analysis of pilot-plant products for copper, zinc, and lead with the Telsec Ub-X-250 Analyser 1977

1838 An investigation of the atomic-absorption spectrophotometric measurement of the elements that form gaseous hydrides and their determination in metal sulphide concentrates 1976

1857 The determination of some trace elements in sulphide concentrates by spectrophotometry 1977 NIM PUBLICATIONS

1872 The determination of mercury by cold-vapour atomic-absorption spectrophotometry 1977 2. Paper

BIBBY. D.M.. and SELLSCHOP, J.P.F. Determination of copper, zinc, iron, and silicon in copper/zinc ore flotation products by fast neutrons. Radiochem. radioanalyt. Lett., vol. 12, no. 4-5. 1972. pp. 245-257.

Programme No. 100

Development of improved ore-dressing processes for the recovery of gold and pyrite from Witwatersrand and O.F.S. gold mines

1. Reports

140 A preliminary mineralogical investigation of pyrite from the Kimberley and the

Main Reefs, Vogelstruisbult Gold Mine 1967

219 A review of some of the mineralogical factors influencing the flotation of pyrite 1967

316 The flotation of pyrite from siliceous gangue by cationic collectors. A literature survey. 1968 430 A mineralogical investigation of pyrite from the Loraine Gold Mine. Orange

Free State 1968

1747 Magnetohydrostatic separation of gold from gravity concentrates 1975

1845 The composition and mode of occurrence of gold in Witwatersrand ores and leach residues 1976 2. Papers GUEST. R.N. The recovery of pyrite from Witwatersrand gold ores. J. S.Afr. Inst. Min. MetalL, vol. 76, spec issue. Oct. 1975. pp. 103-105. KELEGHAN, W.T.H. WHIMS for low-grade uranium. Nucl. Active, no. 16. Jan. 1977. pp. 3-5. LEVIN. J., and VEITCH, ML. Laboratory tests on the flotation of pyrite from Witwatersrand gold ores by cationic collectors/ .S. Afr. Inst. Min. Metali, vol. 70, no. 6. pt 2. Jan. 1970. pp. 259-275. LOU W, G. D.. and I. AXEN. PA. The beneficiation of residue at Blyvooruitzicht Gold Mine./ S.Afr. Inst. Min. Metali., vol. 76. spec, issue. Oct. 1975. pp. 136-139.

UKEN. E-A.. WATTERSON, J.W., KNIGHT, A., and STEELE. T.W. The application of neutron activation analysis to sorting Witwatersrand gold-bearing ores./ S.Afr. Inst. Min. Metali.. vol. 67, no. 3. Oct. 1966. pp. 99-114.

Programme No. 101

Development of improved hydrometallurgical extraction processes tor gold from Witwatersrand and O.F.S. gold mines

I. Reports

The dissolution of gold in cyanide solutions containing copper in a carbonate/bicarbonate medium. Preliminary results 1966

(.7 r NIM PUBLICATIONS

11 Gravimetric determination of carbon dioxide in cyanide solutions 1966

14 A comparison of the effects of additions of carbonate/bicarbonate as opposed to additions of lime in the leaching of a Blyvooruitzicht gold ore 1966

20 The determination of small amounts of gold in barren cyanide solution by atomic-absorption spectrophotometry 1966

24 Determination of gold in barren cyanide solutions by atomic-absorption spectrophotometry 1966

27 Spectrophotometric determination of gold in cyanide solutions after solvent

extraction as the bromo-aurate complex 1966

35 The determination of gold in ores and solutions by neutron-activation analysis 1966

133 Gold recovery by cyanidation from mill products obtained after pyrite flotation. Progress made up to 1st July, 1967 1967 139 A preliminary survey of gold-recovery problems arising in the production of pyrite 1967

165 Gold recovery from pyrite flotation mill products by cyanidation. Progress made up to 1st May, 1967 1967

241 Investigation of the effects of sulphydryl flotation reagents on the cyanidation

of native gold 1967

277 The determination of small quantities of xanthate in cyanide solution 1968

278 Gold recovery by cyanidation from mill products obtained after pyrite flotation 1968

281 The determination of xanthate in cyanide solutions 1968

306 The effect of preacration on two samples of thickener underflow from the Venterspost Gold Mine 1968 308 A mineralogical study of gold particles in pulp residues from the Bracken Gold Mine 1968

317 Results of tests carried out at the Loraine Gold Mine during the period 5th to 7th February. 1968 1968

321 Aeration of ore from the Loraine Gold Mine before the addition of cyanide 1968

323 The coloiimetric determination of cyanide in solution from gold cyanidation plants 1968

348 The determination of gold and silver in pyrite and banket by atomic-absorption spectrophotometry 1968

360 The determination of the alkali metal carbonates and hydroxides or carbonates and bicarbonate* in the presence of permanganate ions 1968 L N1M PUBLICATIONS

377 Examination of pulp samples, treated with cyanide, for coated gold 1968

379 The inhibition of the rate of cyanidation of native gold by Aeromine 3037 1968

385 The determination of the nature of coatings on gold particles 1968

513 Gold recovery by cyanidation from mill products obtained after pyrite flotation 1969

515 The influence of sulphydryl and cationic flotation reagents on the cyanidation of native gold 1969

1545 A mineralogical investigation of leach residues from the Blyvooruitzicht Cold

Mine 1973

1768 Some developments in gold extraction from Witwatersrand ores 1975

1845 The composition and mode of occurrence of gold in Witwatersrand ores and leach residues 1976

2. Papers

ASHURST, KG., and FINKELSTEIN, N.P. The influence of sulphydryl and cationic flotation reagents on the cyanidation of native gold./ S.Apr. Inst. Min. Mttall., vol. 70, no. 6, pt 2. Jan. 1970. pp. 248-256.

FINKELSTEIN. N.P. Thechemistryof the extraction of gold from its ores. GOLD METALLURGY IN SOUTH AFRICA. Adamson, R.J.

FINKELSTEIN, N.P., and HANCOCK, R.D. A new approach to the chemistry of gold. Gold Bull., vol. 7, no. 3. Jul. 1974. pp. 72-77. HAINES, A.K.. EDWARDS. R.I., and TE RIELE, W.A.M. The separation of gold from acidic leach liquors with Amberlite XAD-7. THE THEORY AND PRACTICE OF ION EXCHANGE (AN INTERNATIONAL CONFERENCE HELD AT CHURCHILL COLLEGE, UNIVERSITY OF CAMBRIDGE 25TH - 30TH JULY, 1976). M. Sireat (ed.). London, Society of Chemical Industry. 1976. pp. 40.1-40.12.

MALLETT. R.C. A review of techniques for the determination of gold and silver by atomic-absorption spectroscopy. Miner. Set. Engng, vol. 2, no. 3. Jul. 1970. pp. 28-37.

MRKUSIC. P.O.. SCIARONE. M„ and SIMONSEN, HE. Gold recovery by cyanidation from mill products obtained after pyrite flotation./. S.Afr. Inst. Min. Metall., vol. 70, no. 6, pt 2. Jan. 1970. pp. 236-247.

UKEN. E-A.. WATTERSON, J.I.W.. KNIGHT. A., and SELLSCHOP, J.P.F. The determination of gold in ores and solutions by activation analysis with a neutron generator. Int. J. appl. Rad. Isotopes, vol. 19. 1968. pp. 615-623.

.?. Patents

Recovery and separation of platinum group metals and gold. S.Afr. Pat. 71/4981, 21st Jul., 1972.

Separation and purification of platinum group metals and gold. S.Afr. Pat. 72/0308,27th Dec, 1972. (Also: Brit. Pat. 1.418.391. 2nd Jan., 1973; Fr. Pat. 73.01418, 16th Jan., 1973;/w/. Pat. 976.937, 18th Jan.. 1973; Rhod. Pat. 521/72. 27th Dec, 1972; 5.1V. Afr. Pat. 73/084. 20th Aug., 1973.)

h<> NIM PUBLICATIONS

The separation of platinum group metals and gold. S.Afr. Pat. 74/5109.23rd Jul.. 1975. (Also: Belg. Pat. 832.216. 7th Aug.. 1975: Fr. Pat. 75 24681. 7th Aug.. 1975.)

A process for the treatment of platinum group metals and gold. S.Afr. Pat. 75/0593. 5th Jan.. 1977. (Also: Belg. Pat. 838.029. 29th Jan.. 1976.)'

Programme No. 102

Instrumentation, optimization, and control of processes for the recovery of gold

1. Reports

1209 The economics of instrumentation for the cyanidation of gold 1971

1647 The industrial application of KEGOLD electrodes 1974

2. Paper

FLETCHER. G.W. Process control. GOLD METALLURGY IN SOUTH AFRICA. Adamson, R.J. (ed.). Johannesburg. Chamber of Mines of South Africa, 1972. pp. 256-283.

Programme No. 103

Mineralogical and geochemical studies of gold ores

1. Reports

101 Electron-microprobe identification of opaque minerals in gold ore from the Basal Reef. Free State Geduld Mine 1966

269 A literature survey of the vertical distribution of gold aid uranium in various auriferous reefs 1968

837 The association of gold and uranium with other minerals in different Witwatersrand reefs 1969

13^1 An electron-microprobe analysis of gold in the Witwatersrand banket and in ores from the Barberton Mountain Land 1971

1845 The composition and mode of occurrence of gold in Witwatersrand ores and leach residues 1976

2. Papers

DE WAAL. S.A.. and HERZBERG. W. Uranium and gold mineralization of the Black Reef Series in the Kaapse Hoop area, Nelspruit District, eastern Transvaal. Annals Geol. Soc. S.Afr., vol. 7. i 968-69. pp. 111-124.

LIEBENBERG. W.R. Mineralogical features of gold ores in South Africa. GOLD METALLURGY IH SOUTH AFRICA. Adamson, R.J {ed.). Johannesburg, Chamber of Mines of South Africa. 1972. pp. 352-J46.

MIHÁLIK. P.. and SAAGER. R. Chromite grains showing altered borders from the Basal Reef. Witwatersrand System. Am. Mineralogist, vol. 53. no. 9/10. Sep.-Oct. 1968. pp. 1543-1550. NIM PUBLICATIONS

MINNITT. R.C.A.. BUTTON. A., and KABLE. E.J.D. The gold content of pre-Malmani argillaceous sediments in the Transvaal Supergroup, north-eastern Transvaal. University of the Witwatersrand. Economic Geology Research Unit, information Circular no. 82. Jul. 1973.

SAAGER. R.. and MIHÁLIK, P. Notes on two varieties of pyrite from the Basal Reef of the Witwatersrand System. Econ. Geol., vol. 62. 1967. pp. 719-731.

VON RAHDEN. H.V.R. Apparent fineness values of gold from two Witwatersrand gold mines. Econ. Geol.. vol. 60. 1965. pp. 980-997.

Programme No. 104

Recovery of gold from refractory ores

1. Reports

8 Mineralogy and chemical behaviour of some refractory gold ores from the

Barberton Mountain Land 1966

38 Chemical treatment of refractory gold ores. Literature survey 1966

76 The electron-microprobe investigation of a gold concentrate from the Louis Moore Mine 1966 79 Investigation into the improvement of gold recovery in the cyanidation circuit

of the Louis Moore gold mine 1966

85 The roasting of refractory gold ores and concentrates. Literature survey 1966

90 Mineralogical examination of schist sample from the Giant Reefs Mine 1966

107 Investigations on the treatment of refractory gold ores from the Giant Reefs Mine 1966 127 Comments on the size of gold particles observed in polished sections of ore from the Giant Reefs Mine 1967

148 The recovery of gold from the Fairview dump after pretreatment with sulphurous acid 1967

211 Refractory gold ores. Report on investigations into roasting of gold concentrates in the Edwards roaster of the Fairview and the New Consort reduction plants 1967

333 The hot-water leaching process for refining arsenious oxide in flue dusts from the Fairview Mine 1968

343 A mineralogical investigation of gold-bearing sulphidic ore from the

Florence-Devonian Mine. Barberton 1968

380 Preparation of gold ore before cyanidation 1968

911 The recovery of gold from sulphidic and arsenical ores mainly from the Barberton area 1970 N1M PUBLICATIONS

Programme No. 105

Refining processes for gold and silver

1. Report

1880 The electrochemical reduction of silver chloride and its application to the refining of silver 1977

2. Papers

ASHURST. KG., and NEALE. R.W. The porosity of gold electrodeposits. Trans. Inst. Metal Finishing, vol. 45. no. 2. 1967. pp. 75-82.

ATMORE. R.B.. HOWAT, D.D.. and JOCHENS. PR. The effect of slag and gold bullion composition on the removal of copper from mine bullion by oxygen injection. /. S.Afr. Inst. Min. Metall., vol. 72. no. 1. 1971. pp. 5-11.

Programme No. 150

Research and development of new processes for the refining of platinum-group metals 1. Reports

1744 The refining of the platinum-group metals 1975

1800 An electrochemical investigation of the dissolution and passivation of platinum in acid solutions 1976

1822 Stability constants and linear free-energy relations for the platinum-group metals 1976

1864 The preparation of primary standard solutions for each of the noble metals 1977

1865 A sensitive method for the measurement of osmium by atomic-absorption spectrophotometry 1977

2. Papers HAINES. A.K.. EDWARDS. R.I., and TE RIELE, W. A.M. The separation of gold from acidic leach liquors with Amberlite XAD-7. THE THEORY AND PRACTICE OF ION EXCHANGE (AN INTERNATIONAL CONFERENCE HELD AT CHURCHILL COLLEGE, UNIVERSITY OF CAMBRIDGE 25TH -30TH JULY, 1976). M. Streat (ed.). London. Society of Chemical Industry, 1976. pp. 40.1-40.12. LLOYD. P.J. The extraction of the neutral and anionic nitrato complexes of nitrosylruthenium by long-chain alky) amines./. S.Afr. Chem. Inst., vol. 20, no. 2. Jun. 1967. pp. 174-185. WARSHAWSKY, A. Polystyrenes impregnated with B-diphenylglyoxime, a selective reagent for palladium. Talanta, vol. 2Í. no. 6. 1974. pp. 624-626.

.?, Patents

Recovery and separation of platinum group metals and gold. S.Afr. Pal. 71/4981. 21st Jul., 1972. ~i r MM PUBLICATIONS

Separation and purification of platinum group metals and gold. S.Afr. Pat. 72/0308.27th Dec. 1972. (Also: Brit. Pat. 1.418.391, 2nd Jan.. 1973; Fr. Pat. 73.01418. 16th Jan.. 1973: Ital. Pat. 976.937. 18th Jan.. 1973; Rhvd. Pat. 521/72. 27th Dec. 1972; S. W. Afr. Pat. 73/084. 20th Aug.. 1973.)

Programme No. 151

Research and development of new processes for the treatment of anode sludges from copper refineries

I. Reports

1761 The determination, by atomic-absorption spectrophotometry, of minor elements in anode sludges and residues 1975

1771 The determination of silver, selenium, tellurium, antimony, tin, lead, and arsenic in anode sludges 1975

1784 A single-standard calibration method for use in analysis by X-ray-fluorescence spectrometry 1976

1795 The determination of minor and trace elements in the leach liquors from anode sludges 1976

1808 Spectrophotometric determination (with pyrocatechol violet as chromogenic agent) of aluminium in zirconium metals and in the residues from anode sludges 1976

1809 The analysis, by flameless atomic-absorption spectrophotometry, of pure selenium and tellurium 1976

.». Patents

The separation of platinum group metals and gold. S.Afr. Pat. 74/5109. 23rd Jul.. 1975. (Also: Belg. Pal. 832.216. 7th Aug.. 1975:/r. Pat. 75 24681, 7th Aug.. 1975.)

A process for the treatment of platinum group metals and gold. S.Afr. Pat. 75/0593, 5th Jan.. 1977. (Also: fl

Programme No. 152

Research and development of improved ore-dressing and smelting processes for the recovery of platinum-group metals and chromite from ores, including ores of the Merensky and Chromite Reefs

1. Report

I206 A review of the South African platinum-mining industry 1971

2. Paper

URQUHART. R.C'.. RENN/E. M.S.. and RABEY. C.C. The smelting of copper-nickel concentrates in an electric furn^c. THE EXTRACTIVE METALLURGY OF COPPER. Yannopoulos, Y., and Agarwal, J. (eds.). New York. AIME. 1976. vol. 1. pp. 274-295.

V" " • mil MM PUBLICATIONS

Programme No. 153

Development of new and improved methods for the analysis of platinum-group metals in ores, concentrates, mattes, and pure metals

I. Reports

349 The separation of platinum from solution after fusion with potassium bifluoride 1968

526 The determination of the platinum-group metals and gold in ore samples 1969

S90 The determination of the platinum-group metals and gold in ore samples - Part

II 1969

961 The preparation of standard solutions for the platinum-group metals and gold 1970

970 The determination, by atomic-absorption spectrophotometry, of platinum. palladium, rhodium, ruthenium, gold, silver, and lead, in prills 1970 y71 The determination of gold by atomic absorption, and of platinum, palladium. rhodium, and iridium by spectrophotometry, in solutions 1970

976 The determination, by atomic-absorption spectrophotometry, of gold in cupellation prills and in platinum-metal concentrates 1970

977 The collection and rapid determination of noble metals in ores and concentrates by the fusion technique using lead as a collector 1970

994 The separation and determination of noble metals by reversed-phase extraction chromatography 1971

1003 The chromatographic separation and determination of platinum, palladium.

rhodium, and iridium 1970

1017 The spectrophotometric determination of rhodium 1970

1037 The determination of gold in concentrates of the platinum-group metals after extraction with dihutyl Carbitol' 1970 1048 The determination, by neutron-activation and tracer techniques, of the losses of iridium during the fire-assay procedure for the platinum-group metals 1970

1086 The determination, by atomic-absorption spectroscopy, of platinum. palladium, rhodium, ruthenium, and gold in the presence of base metals 1970

1108 Interferences relating to the determination of the noble rm tills by atomic-absorption spectrophotometry 1970

11-^7 The determination of the platinum-group metals and gold in ore samples- Part

III 1971

1179 The spectrophotometric determination of iridium 1971

1185 The recovery of noble metals for analysis. A radio-tracer investigation of losses 1971 NIM PUBLICATIONS

12 í 8 The acid-extraction of noble metals from low-grade concentrates and ores, and the subsequent determination of platinum, palladium, rhodium, and gold 1971

1219 Spectrographic analysis for the noble metals present in solutions 1971

1232 The determination of osmium 1971

1245 The separation of non-volatile noble metals by reversed-phase extraction chromatography 1971

1260 Interference by base metals in the spectrophotometric determination of platinum metals 1971

1273 The coprecipitation of noble metals from tellurium. I. Platinum, palladium, rhodium, and gold 1971

1318 The determination, by atomic-absorption spectrophotometry, of osmium and

iridium in solution 1971

1324 The separation of base metals from noble metals by cation exchange 1971

1371 Concentration of the noble metals by a fire-assay technique using nickel sulphide as the collector 1971 1401 The pressure dissolution of platiniferous materials by the sealed-tube technique 1972

1432 The determination of ruthenium and osmium in the residues resulting from the leaching of mattes 1972

1500 Tiie chromatographic separation and determination of noble metals in matte-leach residues 1973

1534 The determination, by atomic-absorption spectrophotometry, of noble metals in the presence of sodium, barium, or sulphate ions. A comparison of uranium and lanthanum as releasing agents 1973

1555 The analysis, by atomic-absorption spectrophotometry, of matte-leach

residues 1973

1569 The use of DDTU as an analytical reagent for the noble metals 1973

1574 The chromatographic separation and gravimetric determination of noble

metaK in matte-leach residues 1973

1580 The determination of silver in ores, concentrates, and mattes 1973

1590 The separation of osmium from ruthenium in hydrochloric acid solutions 1974

1598 The use of carbon-rod devices in the determination of noble metals by atomic-absorption spectrophotometry 1974 1^54 The determination of osmium in platiniferous media 1974 MM PUBLICATIONS

1669 An assessment of the carbon-rod atomizer for the determination of silver 1974

1679 The detection of noble-metal impurities in refined noble-metal solutions by thin-layer chromatography 1974

1 f>84 The application of three-phase liquid-liquid extraction to the separation and concentration of noble metals 1974

1705 The effects of various matrix elements on the efficiency of the fire-assay procedure using nickel sulphide as the collector 1975

1714 The efficiency of the fire-assay procedure, using nickel sulphide as a collector. for platinum, silver, gold, and iridium, and of the subsequent parting procedure 1975

1717 The use of isothioronium compounds as liquid-liquid extractants for the noble

metals and silver 1975

1739 The determination of trace amounts of noble metals in sulphate media 1975

1826 Dithiocarbamate as a releasing agent in the atomic-absorption determination of noble metals in organic media 1976 1837 The rapid and precise determination of noble metals in matte-leach residues by atomic-absorption spectrophotometry 1976

185 2 A revised method for the pressure dissolution of platiniferous materials by the sealed-tube technique 1976

1864 The preparation of primary standard solutions for each of the noble metals 1977

1865 A sensitive method for the measurement of osmium by atomic-absorption spectrophotometry 1977

1881 n-octylaniline. a new treatment for noble metals 1977

2. Papers

MALLETT. R.C.. PEARTON. D.C.G.. RING. E.J.. and STEELE. T.W. Interferences and their elimination in the determination of the noble metals bv atomic-absorption spectrophotometry. Taliinta, vol. 19. no. 2. 1972. pp. 181-195.

MALLETT. R.C.. PEARTON. D.C.G.. RING. E.J.. and STEELE, T.W. Interferences encountered in the determination of the noble metals by atomic-absorption spectrophotometry. J. S.Afr. Chem. Inst., vol. 25, no. 3. 1972. pp. 219-229.

PALMER. I.. PALMER. R.. and STEELE. T.W. The separation of platinum, palladium, rhodium and gold from ores and concentrates by aqua regia extraction and by high-temperature chlorination followed by acid leaching. J. S.Afr. Chem. Inst., vol. 25. no. 3. 1972. pp. 190-197.

PEARTON. D.C.G . BRECKENRIDGE. R.L.. DUBOIS. M.. and STEELE. T.W. The pressure dissolution of platiniferous materials by the sealed-tube technique and the analysis of the resulting solutions. J. S.Afr. Chem. Inst., vol. 25. no. 3. 1972. pp. 244-253.

POHI.ANDT. C. ROBERT. R.. VALÊE. A.M.. and STEELE. T.W. The separation of non-volatile noble metals on cellulose, and the application of the technique to the analysis of matte-leach residues. J. S.Afr. Chem. Inst., vol. 25. no. 3. 1972 pp. 198-213. NIM PUBLICATIONS

POHLANDT, C and STEELE, T.W. Separation of the non-volatile noble metals by reversed-phase extraction chromatography. TaLnta, vol. 19, no. 7. 1972. pp. 839-850.

POHLANDT. C. and STEELE. T.W. Chromatographic separation and determination of noble metals in matte-leach residues. Talanta, vol. 21, 1974. pp. 919-925.

ROBERT, R.V.D.. VAN WYK, E.. PALMER. R., and STEELE, T.W. The development of a fire-assav procedure using nickel sulphide as the collector for the noble metals. J. S.Afr. Chem. Inst., vol. 25. no. 3. 1972. pp. 179-189.

RUSSELL. B.C. EDDY. B.T.. BECKMANN, C. and STEELE. T.W. The application of X-rav-fluorescence techniques to the determination of the noble metals. J. S.Afr. Chem. Inst., vol. 25. no. 3. 1972. pp. 297-310.

Programme No. 154

Mineralogical studies of platinum-group metals and chromite- containing reefs in the Bushveld Igneous Complex

I. Reports

325 Investigation for nickel and precious metals in samples from Malelane 1968

1203 The chromite of the Bushveld Igneous Complex. An assessment of published information 1971

1415 The interrelation of the chemical, physical, and certain metallurgical properties of chrome spinels from the Bushveld Igneous Complex 1972

1709 The mineralogy, chemistry, and certain aspects of reactivity of chromitite from the Bushveld Igneous Complex 1975

1726 Mertieite and an unnamed compound of palladium with arsenic and tin in a mineral intergrowth from the Atok Mine 1975

1730 The chromitite from the Marico occurrence, western Transvaal, its alteration. and possible reasons for its refractory nature 1975

2. Papers

BRYNARD. H.J., DE VILLIERS, J.P.R.. and VILJOEN, E.A. A mineralogical investigation of the Merenskv Reef at the Western Platinum Mine, near Marikana, South Africa. Econ. Geo!., vol. 71, no. 7. 1976.'pp- 1299-1307.

GASPARRINI, E.. and HIEMSTRA. S.A. Paolovite (Pd.Sn) from the Atok Mine in the Merensky Reef. Trans. Geol. Soc. S.Afr., vol. 78. 1975. pp. 167-169.

MIHÁLIK. P., HIEMSTRA, S.A.. and OE VILLIHRS. J.P.R. Rustenburgite and atokite, two new platinum-group metals from the Merensky Reef, Bushveld Igneous Complex. Can. Mineralogist, vol. 13. no. 2. 1975. pp. 146-150.

MIHÁLIK. P., JACOBSEN, J.B.E., and HIEMSTRA, S.A. Platinu.n-group minerals from a hydrothermal environment. Econ. Geol., vol. 69, no. 2. Mar .-Apr. 1974. pp. 2 "7-262.

SCHWELLNUS, J.S.I.. HIEMSTRA. S.A.. and GASPARRINI. E. The Merensky Reef at the Atok Platinum Mine and its environs. Econ. Geol., vol. 71. 1976. pp. 249-260.

77 ~\ r MM PUBLICATIONS Programme No. 200

Development of improved processes for the recovery of phosphates and phosphorus chemicals

1. Reports

120 Exploratory tests on the recovery of apatite and magnetite from the farm Schiel 1967

302 Mineralogical examination of phosphate in pyroxenite from St. Agnesfontein. north-western Transvaal 1968

ySó A mineralogical study of eight samples of phosphate ore from

Steenkampskraal, Van Rhynsdorp, Cape Province 1970

1028 Exploratory heavy-liquid separation tests on a low-grade apatite concentrate 1970

1204 The flotation of phoscorite ores. Possible correlations between chemical variables in solution and metallurgical performance lo71 2. Paper LOVEL!.. VM. Froth characteristics in phosphate flotation. FLOTATION. A.M. GAVDIN MEMORIAL VOLUME. Fuersienau, M.C. (ed.). vol. 1. New York, American Institute of Mining. Metallurgical and Petroleum Engineers. Inc., 1976. pp. 597-621.

Programme No. 201

Development of improved processes for the recovery of fluorspar

I. Reports

77 Concentration of fluorspar from the farm Strydfontein. Marico district.

Preliminary investigation 1966 208 Determination of fluorine in fuorspar ores by neutron-activation analysis 1967 1424 A review of t' e World's fluorspar industry, with particular reference to South

1438 Africa 1972

I486 A mineralogical examination of fluorspar ores from the Ottoshoop area 1972

1577 Review of the fluorochemical industry of the World 1972

1595 Quantitative analysis of fluorite ores by X-ray diffraction ]973

Preliminary tests on low-grade brecciatcd fluorspar ore from the Ottoshoop 1612 district 1973 Flotation tests on sulphide-bearing high-grade brecciated and wad ores 1974 1615 Fluorspar pellets. A survey of the World market and an assessment of future South African production 1974

1643 Further tests on low-grade brecciated fluorspar ore from the Ottoshoop district 1974 L J NIM PUBLICATIONS

1646 Examination of the method of analysis for calcium fluoride in fluorspar 1974

1660 An economic assessment of the production of high-grade fluorspar pellets 1974

1668 An updated summary of the World's fluorspar industry 1974

1715 Flotation tests on various types of ore from the Ottoshoop district 1975

1725 The determination of silica in fluorspar by 14 Me V neutron-activation analysis 1975

IS 14 An updated summary of the World's fluorspar industry. 1975 1976

1886 A rapid method for the determination of fluoride in geological samples 1977

2. Papers

GÓSSLING. H.H.. and McCULLOCH. H.W. Fluorspar - the use of a non-metallic mineral. Miner. Sci. Engng, vol. 6. no. 4. Oct. 1974. pp. 206-222.

SEE. J.B. Fluorspar and fluorine compounds in high-temperature smelting and refining of metals. Miner. Sci. Engng, vol. 8. no. 4. Oct. 1976. pp. 217-241.

Programme No. 202

Investigation of processes for the production of alumina and aluminium from local raw materials

I. Reports

26 Economic evaluations of the possible production of alumina from Sasol ashes by the ammonium sulphate baking process and the ammonium fluoride and sulphuric acid leaching process 1967

30 The extraction of alumina from Sasol coal ash 1966

51 Exploratory tests on the recovery of diaspore from a ferruginous shale from the Gamagararand 1966

69 Preliminary examination of ijolite from Spitzkop 1966

89 Mineralogical examination of ijolite from Spitzkop 1966

143 A review of the investigations into the possibility of producing alumina and aluminium from South African ores 1967

149 The extraction of alumina, potash and soda from a nepheline concentrate 1967

Programme No. 203

Investigation of processes for the production of aluminous refractories, with special reference to sillimanite and andalusite

I. Reports

48 The investigation of a suspected sillimanite-nearing sample 1966 N1M PUBLICATIONS

307 Preliminary examination of kyanite-bearing material from Granville, Leydsdorp 1968

347 Concentration tests on 'rich blue nobby' kyanite-bearing ore from Nkandhla. Zululand 1968

493 Concentration of andalusite from alluvial sands from the farm Goedgelegen. Groot Marico district 1969

1281 The heavy-medium cyclone concentration plant for the treatment of andalusite

sands on the farm 'Wonderfontein", Groot Marico district 1971

1445 Cost assessments for the production of andalusite concentrates 1972

1478 An examination of two andalusite-bearing samples from Magostad No. 6, Marico district, western Transvaal 1972 1505 The production of the refractory aluminium silicates, with special reference to South Africa 1973

1779 A summary of work done on the concentration of andalusite from deposits in the western Transvaal 1976

Programme No. 204

Processes for the production ot magnesite and magnesium oxide

I. Report

1706 Concentration of magnesite from Apiesbomen, Burgersfort district 1975

Programme No. 206

Processes for the production of sodium chemicals (e.g., salt, soda ash) I. Report

1843 The treatment of Athlone Sewerage-plant effluent by the DESAL process 1976

Programme No. 207

Processes for the production of potassium chemicals

I. Report

298 The recovery of potassium from phlogopite 1968

Programme No. 250

Processing of pegmatites for the recovery of niobium, tantalum, spodumene, mica, beryl, etc. I. Reports

21 The use of heavy-medium separation for the recovery of spodumene 1966 ~i r NIM PUBLICATIONS

96 The mode of occurrence of beryl in grey gneiss along the contact with the Gesie pegmatite 1966

102 Micas of the Noumas pegmatite 1966

142 Micas from the Namaqualand pegmatite area 1966

190 Micas from the Namaqualand pegmatite area 1967

225 Test to recover tantalite-columbite from a bulk sample of tailing from the Noumas pegmatite by pneumatic tabling 1967

233 A chemical and mineralogical study of microlite from Noumas pegmatite (Available only on loan from NIM Library) 1967

-58 Exploratory concentration tests by Warren Spring Laboratory on the use of the fluidized-bed concentrator for the recovery of spodumene 1967

262 Preliminary giavity concentration tests for the recovery of scheelite, wolframite, and cassitcrite from the tailing dump at Boksputs in the Gordonia district 1967

266 Concentration tests for the recovery of lepidolite from tailing dumps at Helicon and Rubicon Mines by electrostatic separation and flotation 1968

473 Mineralogical examination of tantalite-bearing samples from the Warmbad

district. South West Africa 1968 482 Review of work on the treatment of pegmati'es 1969 483 Summary of the mineralogical investigation of pegmatites 1969 494 A preliminary study of beryllium distribution in phyllosilicates from the Etiro pegmatite, Karibib. South West Africa 1966

496 A preliminary study of beryllium distribution in quartzes from the Etiro pegmatite, Karibib. South West Africa 1969

1308 Heavy-medium tests for the treatment of pegmatite ores and dump material in Namaqualand 1971

1443 Gravity concentration tests on four samples from Tantalite Valley, S.W.A. 1972

1508 The selection of economically mineralized pegmatites according to their border-zone characteristics 1973

1583 Preliminary tests on winnowing for the recovery of mica 1973

1813 The economic potential of some pegmatites from the Kenhardt area in relation to the trace-element content of their border zones 1976

SI L jajtmm} MM PlBI.lt ATIONS

Programme No. 251

Recovery of ilmenite, rutile, zircon, and other minerals from beach-sand and similar deposits

I. Reports

1217 Investigation of beach sands from Bantu Area No. 4. Nhlabane. Zululand 1971

1541 Further tests on beach sands from Bantu Area No. 4. Nhlabane, Zululand 1973

1619 Reduction of the chromium in ilmenite concentrates 1974

I 632 A mineralogical examination of heach-sand concentrates from a pilot plant at Richards Bay 1974

1831) The determination of iron in zircon beach sands and its teachability 1977

Programme No. 252

Recovery of tungsten concentrates from ores, and the development of processes for the refining of tungsten

I. Reports

171" The recovery of scheelite from Shongona, north-western Transvaal 1975

1817 The rapid determination by X-ray-fluorescence spectrometry of tungsten in tungsten ores and concentrates 1976

1875 The determination of tungsten and iron in ferrotungsten alloys by X-rav-fiuorescence spectrometry 1977

Programme No. 253

Processes for the upgrading of manganese ores and for the production of manganese dioxide and manganese chemicals

I. Reports

63 X-ray and spectrographs analyses of seven samples of manganese ore 1966

65 Samples of manganese dioxide for battery tests hy the CSI R 1966

7K X-ray investigation of four samples of manganese ore 1966

83 Qualitative X-ray examination of two samples of MnOj ore 1966

('7 X-ray diffraction analysis of six samples of manganese ore from Graskop. eastern Transvaal 1966

l>8 Qualitative X-ray analysis of manganese dioxide ore from Graskop 1966 NIM PUBLICATIONS

108 An X-ray -diffraction method for the quantitative determination of nsutite (y-MnO..) and cryptomelane (a-MnO*) in ores from the Gopani Mine, Transvaal 1966

111 The X-ray investigation of a sample of upgraded material from the Graskop wad deposit 1966

288 Ramsdellite (MnO:) from the Hotazel Mine, northern Cape Province 1968

2. Papers DE VILLIERS. J.P.R. The crystal structure of braunite with reference to its solid-solution behaviour. Amer. Mineralogist, vol. 60. 1975. pp. 1098-1104. DE WAAL. S.A. Ramsdellite from the Hotazel Mine, northern Cape Province, South Africa. Econ. Geoi, vol. 64. no. 2. 1969. pp. 221-222. RUSSELL, B.G. Flame-photometric determination of sodium and potassium in manganese ores. Analyst. Lond., vol. 91. no. 1085. Aug. 1966. pp. 511-519.

Programme No. 255

Research and development tor the production and use of zirconium and its alloys in non-nuclear fields I. Repttrfs

1808 Spectrophotometric determination (with pyrocatechol violet as chromogenic agent) of aluminium in zirconium metals and in the residues from anode sludges 1976

1861 The determination of some impurities in zirconium metal by instrumental neutron-activation analysis 1976

Programme No. 256

Recovery of iron, titanium dioxide, and vanadium from iron ores containing titanium and vanadium

1. Reports

54 Electron-microprobe investigation of magnetite from the Bushveld Igneous Complex 1966

I6J The quantitative electron-microprobe determination of the magnesium content of magnetite from Phalaborw^ 1967

328 A mineralogical examination of iron ore from Nooitgedacht. near Airlie

Station, eastern Transvaal 1968

1488 Extraction of rutile from Highveld smelter slags 1972

1515 A mineralogical investigation of titaniferous magnetite from the Mambula Intrusion, Natal 1973 NIM PUBLICATIONS

1522 An electron-microprobe investigation of an «solved mineral in a sample of

magnetite 1973

1546 Pilot-plant smelting campaign on iron ores from Tete 1973

1557 Cost estimates for the production of pig iron in the Tete district of Mocambique 1973 1565 A mineralogical investigation of the vanadium-rich titaniferous iron ore from

Tete. and the slag produced from it 1973

1600 Dilute-acid leaching of slag from Tete ore 1973

1602 The roasting of Tete slag for the extraction of vanadium 1973

1614 The extraction of rutile from smelter slags 1974

1620 The recovery of titanium dioxide from Tete slag by the sulphate route 1974

1635 Magnetic tests on Tete slag and ore 1974

1671 Pyrometallurgical retreatment of a slag for the recovery of vanadium 1974

2. Papers

JOCHENS, PR. SOMMER, G . and HOWAT, D.D. Preliminary equilibrium and non-equilibrium phase studies of titaniferous slags. J. Iron Steel Inst., vol. 207, no. 2. Feb. 1969. pp. 187-192. LYCETT, R.A.H., JOCHENS, PR., and HOWAT, D.D. The crystallization of rutile from titaniferous slags. J. S.Afr. Inst. Min. Metali, vol. 76, no. 2. Sep. 1975. pp. 20-24.

Programme No. 258

Recovery of tin concentrates from ores, and refining of tin

1. Reports 12 Exploratory tests on the concentration of tin ore from Kuils River, C.P. 1966

128 Exploratory concentration test for the recovery of cassiterite from Sandspruit No. 51. Bronkhorstspruit district 1967 350 Concentration of cassiterite from two samples from Enkeldoorn, Bronkhorstspruit district 1968 1589 Preliminary investigations into the flotation of tin dioxide, cassiterite, and some related gangue minerals 1973 2. Papers

DE WAAL. S.A. The Bushveld granites in the Zaaiplaats area. Trans. Geol. Soc. S.Afr., vol. 75, pt 2, May-Aug. 1972. pp. 135-147. McIVER, J.R., and MIHÁL1K, P. Stannian andradite from 'Davib Ost', South West Africa. Can. Mineralogist, vol, 13. no. 3. Aug. 1975. pp. 217-221.

K4 NÏM PUBLICATIONS

Programme No. 259

Processes for the production and refining of niobium and tantalum metal and their alloys

I. Reports 1010 The leaching, with hydrofluoric acid, of materials containing tantalum and niobium 1970 1154 The extraction and separation of niobium and tantalum by liquid-liquid extraction using tri-n-butyl phosphate 1970

1178 Further leaching tests, with hydrofluoric acid, on a tantalite concentrate 1970

1282 The determination of free hydrofluoric acid in the leach liquors from tantalum-niobium ores 1971

Programme No. 262

Development of new and improved methods for the analysis of silicate-containing ores and concentrates I. Reports

5 The spectrophotometry determination of trace amounts of tin 1966

10 The determination of phosphate in silicate samples 1966

37 The determination of aluminium in silicate samples by complexometric

titration 1966

40 The spectrophotometric determination of tin in silicate materials 1966

82 The spectrophotometric determination of cobalt with 2-nitro-l-naphthol 1966 136 Determination of aluminium in silicate materials by solvent extraction and atomic-absorption spectrophotometry 1967 137 Determination of aluminium by atomic-absorption spectrophotometry with the nitrous oxide and acetylene flame 1966 138 The determination of beryllium by atomic-absorption spectrophotometry 1967 151 The spectrophotometric determination of minor amounts of antimony 1967 160 The determination of copper in rocks and ores by atomic-absorption spectrophotometry 1967 173 The determination of beryllium by atomic-absorption spectrophotometry 1967 193 An investigation into the use of platinum ware for silicate analysis 1967 200 The spectrochemical analysis of silicate material by a plasma-jet source 1967 216 The determination of minor quantities of manganese in silicate materials 1967 265 The spectrophotometric determination of minor quantities of chromium in silicate materials 1967 NIM PUBLICATIONS

276 The determination of vanadium in silicate materials by atomic-absorption spectrophotometry 1968 289 The determination of lead in silicate materials by atomic-absorption spectrophotometry 1968 358 The determination of mercury at concentrations of parts per thousand million in geological samples 1968 359 The separation and determination of calcium and magnesium in silicate material 1968 361 The spectrophotometric determination of small amounts of calcium and magnesium in glass sands and allied materials 1968 362 The determination of cobalt in geological samples by atomic-absorption spectrophotometry 1968

392 The spectrophotometric determination of small amounts of calcium and magnesium in glass sands and allied materials 1968 456 Method for the determination of vanadium in silicate materials by atomic-absorption spectrophotometry 1969

457 The determination of rubidium and caesium in silicate materials by atomic-absorption spectrophotometry 1969 459 Determination of tantalum in rocks and minerals by paper-partition ch romatography 1969 466 The volumetric determination of aluminium in silicate materials 1969 486 Determination of strontium in ores by atomic-absorption and emission spectrophotometry 1969

487 The spectrophotometric determination of minor quantities of vanadium in silicate materials 1969 499 The determination of molybdenum by atomic-absorption spectrophotometry 1969

524 The determination of minor amounts of molybdenum in soil samples 1969

537 Flame-photometric determination of lithium with the Techtron AA4 spectrophotometer 1969

894 The determination of thorium in silicate rocks 1969

998 The determination of macroscopic amounts of total rare-earth oxides and thorium oxide 1970

1088 The determination of ferrous iron in refractory minerals 1970

1096 The spectrophotometric determination of titanium in ores, rocks, and minerals, with diantipyrylmethane 1970 1428 The separation and determination of trace and minor amounts of individual rare earths in silicates 1972

1503 Fast-neutron-activation analysis for the determination of oxygen in rock samples 1973 MM PUBLICATIONS

1514 The determination by X-ray-fluorescence spectrometry of minor amounts of niobium and tantalum in geological materials 1973 1571 The commissioning of a direct-reading spectrometer for the analysis of silicate rocks by the use of the graphite-pellet technique 1973

1579 The determination of tin in geochemical-survey samples 1973

1599 The analysis of silicate rocks and metallurgical slags by X-ray-fluorescence spectrometry 1974 1611 The X-ray-fluorescence determination of percentage concentrations of niobium and tantalum in ores and minerals 1974 1656 The analysis of geological samples for trace elements by direct-reading emission spectrometry 1974 1665 The determination of minor amounts of antimony in ores and concentrates by atomic-absorption spectrophotometry 1974 1742 The determination of tin in ores, residues, and concentrates by X-ray-fluorescence spectrometry 1975 1813 The economic potential of some pegmatites from the Kenhardt area in relation to the trace-element content of their border zones 1976 IX34 The analysis of slag and silicate samples with a fully automatic sequential X-ray spectrometer 1976 1840 The spectrophotometric determination of total uranium in silicate ores and leach liquors by use of bromo-PADAP 1976

1841 The determination of acid-soluble uranium in silicate ores and solutions 1976

1886 A rapid method for the determination of fluoride in geological samples 1977

2. Papen PEARTON. D.C.G.. and TAYLOR. J.D. The determination of copper in rocks and ores by atomic absorption spectroscopy. Bull. S.Afr. Inst. Assayers Analysis, no. 4. Jul. 1969. PEARTON. D.C.G.. TAYLOR. J.D. FAURE. P.K., and STEELE, T.W. The determination of vanadium in silicate materials bv atomic aosorption spectrophotometry. Analyt. chim. Acta, vol. 44, 1969. pp. 353-359.

RUSSELL. B.G SPANGENBERG. J.D.. and STEELE. T.'V. An investigation into the use of platinum ware for silicate analysis. Talantu, vol. 16. no. 4. 1969. pp. 487-496.

Programme No. 500

General physicochemical study of flotation and flocculation, and the development of reagents for these processes I. Reports

42 The redox potential of solutions of potassium ethyl xanthate 1966

43 The effect of oxygen on the stability of solutions of potassium ethyl xanthate 1966 ~\ r NIM PUBLICATIONS

45 An apparatus used in the study of interactions between sulphide minerals, sulphydryl reagents and oxygen 1966 300 The mixed-collector system xanthate plus quaternary ammonium halide. A literature survey 1968 312 An investigation of the influence of alky I trimethyl ammonium halides on the stability of potassium ethyl xanthate in aqueous solution 1968 340 The detection of the formation of a bulk adduct between potassium ethyl xanthate and dodecyl trimethyl ammonium bromide in aqueous solution 1968 371 A preliminary investigation of cyanide-sulphydryl mixed-ligand complexes of mercuric ion 1968 437 The bathochromic shift of the 381 nm absorption peak in aqueous solutions of potassium ethyl xanthate containing dodecyltrimethyl ammonium bromide 1968 442 n Ondersoek na die gebiuik van die Haliimondbuis vir die kwantitatiewe bestudering van flottasieverskynsels met besondere verwysing na die kondisionering van apatiet en kalsiet 1968

443 The determination of anionic surface-active agents in dilute aqueous solution 1968

449 The determination of cationic surface-active agents in dilute aqueous solution 1968

464 The saturation pressure of nitrogen in determinations of surface area 1969 j

49K An infrared investigation of the potassium alkyl xanthate and alkyl trimethyl ammonium bromide mixed-collector system 1969 504 The influence of preadsorbed oleate ions on the adsorption of water vapour by insoluble ionic crystals 1969 527 Ouantitative aspects of the interaction between galena, xanthate, and oxygen at a pH value of 10 1969

533 Determination of the stoichiometry and stability constants of mercury(II)-cyanide-xanthate complexes. I. Low-concentration region 1969 870 Determination of the stoichiometry and stability constants of mercury(II )~cyanide-xanthate complexes. II. High-concentration region 1970

1026 Small-scale flotation techniques * 1970

1114 A study of the products of reaction between galena and aqueous xanthate solutions 1970 1125 Studies of the stability of xanthates and dixanthogen in aqueous solution, and the chemistry of iron xanthates and cobalt xanthates 1971

1296 A review of reactions in the flotation system galena-xanthafe-oxygen 1971

1340 The cadmium-cyanide-xanthate system 1971

1372 The electrical double-layer properties of kimberlite suspensions 1971 1402 A study of mineral-surface properties by the use of gas-adsorption measurements 1972

1403 The coagulation and flocculation of suspensions of kimberlite 1972 L • J MM PUBLICATIONS

1414 The use of a closed recirculation apparatus in the study of the galena-oxygen-xanthate system 1972

1439 The reaction of sulphide minerals with thiol compounds 1972

1447 A preliminary electrochemical investigation of the galena-xanthate-oxygen system in aqueous solution 1972 1479 Infrared studies of the adsorption of oleate species on mineral surfaces, with special reference to fluorite 1972

1490 The adsorption of krypton, nitrogen, and water vapour on sodium oleate 1972

1495 A method for the determination of elemental sulphur on the surface of sulphide

minerals 1972

17S5 Some thermodynamic aspects of systems relevant to the flotation of sphalerite 1976

1854 The interaction of pyrite. oxygen, and xanthate 1977 2. Papers ALLISON. S.A.. and FINKELSTEIN. N.P. A study of the products of reaction between galena and aqueous xanthate solutions. Trans. Instn Min. Metal)., vol. 80, no. 781. Dec. 1971. pp. C235-C239.

ALLISON. S.A.. GOOLD. LA.. NICOL. M.J.. and GRANVILLE. A. The products of reaction between sulphide minerals and aqueous xanthate solutions, and a correlation of the products with electrode rest potentials. Metall. Trans., vol. 3, no. 10. Oct. 1972. pp. 2613-2618.

ASHURST. KG.. FINKELSTEIN, N.P.. and RICfc. N.M. Studies of cyanide-xanthate mixed ligand complexes of mercury(ll). J. chem. Soc. (A), 1970 pp. 2302-2307. FINKELSTEIN. N.P. Kinetic and thermodynamic aspects of the interaction between potassium ethyl xanthate and oxvgen in aqueous solution. Trans. In,in Min. Melall., vol. 76. no. 724. Mar. 1967. pp. C51-C59.

FINK ELSTEIN. N.P. The influence of alkyltrimethyl ammonium halides on the stability of potassium ethyl xanthate in aqueous solution/, appl. Chem., vol. 19. Mar. 1969. pp. 73-76.

FINKELSTEIN. N.P. Quantitative aspects of the role of oxygen in the interaction between xanthate and galena. Sepn Sci., vol. 5, no. 3. Jun. 1970. pp. 227-256.

FINKELSTF.IN. N.P. The rate of decomposition of alkaline xanthate solutions. Colloid Polymer.Sci., vol. 255. 1977. pp. 168-169.

FINKELSTEIN. N.P.. and ALLISON. S.A. The chemistry of activation, deactivation and depression in the notation of zinc sulphide: a review. FLOTA TION. A.M. GA VDIN MEMORIA L VOLUME. Fuerswnau, M.C. fed), vol. I. New York. American Institute of Mining. Metallurgical and Petroleum Engineers. Inc.. !976. pp. 414—457.

FINKELSTEIN. N.P. ALLISON. S.A.. LOVELL. V.M.. and STEWART. B.V. Natural and induced hvdrophohicitv in sulphide mineral systems. ADVANCES IN INTERFACIAL PHENOMENA OF PÁRTKUI.ATEISOLUTION/GAS SYSTEMS; APPLICATION TO FLOTATION RESEARCH. Somasundaran, P., and Grieves, R.B. leds.). New York. AIChE. Chemical Engineering Progress Symposium Series no. 13, 1975. fTNKEI.STEIN. N.P.. and LOVELL. V.M. Fundamental studies of the flotation process: the work of the National Institute for Metallurgy. J. S.Afr. Inst. Min. Metall., vol. 72. no. 12. Jul. 1972. pp. 328-341.

GAl'DIN. A.M.. and FINKELSTEIN. N.P. Interactions in the system galena-potassium ethyl xanthate-oxygcn. Nature, Lond.. vol, 207. no. 4995. Jul. 1965. pp. 389-391. MM PIBI RATIONS

GRAN VILLE. A.. FINKELSTEIN. N.P.. and ALLISON. S.A Review of reactions in the flotation system galena-xanthate-oxygen. Trans. Instn Min. Metall.. vol. 81. no. 784. 1972. pp. C1-C30.

HALL. PG. LOVELL.V.M.. and FINKELSTEIN. N.P. Adsorption of water vapour on ionic solids containing preadsorbed sodium oleate. Part I. Calcium fluoride. Trans. Farad. Soc.. vol. 66, no. 570. pt 6. Jun. 1970. pp. 1520-1529.

HALL. P.O.. LOVELL.V.M.. and FINKELSTEIN. N.P. Adsorption of water vapour on ionic solids containing preadsorbed sodium oleate. Part 2. Calcium carbonate. Trans. Farad. Soc., vol. 66. no. 574. pt 10. Oct. 1970. pp. 2629-2635.

HARRIS. P.J.. and FINKELSTEIN. N.P. Interactions between sulphide minerals and xanthates. I. The formation of monothiocarbonate at galena and pyrite surfaces. Int. J. Miner. Proc, vol. 2. no. 1. 1975. pp. 77-100.

HARRIS. P.J., and FINKELSTEIN. N.P. The formation of monothiocarbonates during the reaction between xanthates and sulphide minerals in flotation systems. PROCEEDINGS ELEVENTH MINERAL PROCESSING CONGRESS. Ente Minerario Sardo. Cagliari, Instituto di Arte Mineraria. Special volume, 1975. pp. 35-57. l.OVELL, V.M. The determination of the surface area of minerals by the B.E.T. method: some associated problems. Powder Technol., vol. 12, no. 1975. pp. 71-76.

LOVELL. V.M.. GOOLD, LA., and FINKELSTEIN, N.P. Infrared studies of the adsorption of oleate species on calcium fluoride. Int. J. Miner. Process., vol. 1, no. 1. Jan. 1974. pp. 183-192.

LOVELL. V.M. Froth characteristics in phosphate flotation. FLOTATION. A.M. GAUDIN MEMORIAL VOLUME. Fuerstenau, M.C. (ed.). vol. 1. New York, American Institute of Mining, Metallurgical and Petroleum Engineers, Inc., 1976. pp. 597-621.

LUSHER. J. A. The association of calcium ion with nick«?liferouspyrrhotite. Surface Sci., vol. 5,1966. pp. 252-254.

MACKENZIE. J.M.W. Zeta-potential studies in mineral processing: measurement techniques and applications. Miner. Sci. Engng, vol. 3, no. 3. Jul. 1971. pp. 25-43.

POHLANDT. C, COOK, E.B.T., and STEELE, T.W. Determination of small quantities of xanthatc. Talanta. vol. 16. no. 8. 1969. pp. 1129-1135.

Programme No. 501

General physicochemical study of hydrometallurgy

I. Reports

KM 2 The coordination numbers of cyanide complexes of zinc, cadmium, and mercury in aqueous solution 1970 1093 The calculation of the equilibrium distribution of metal-ion complexes in multicomponent aqueous systems 1970

1153 E„/E„ diagrams. Their use in the estimation of unknown standard reduction potentials, with particular reference to the d'" electronic-configuration ions 1970

1582 The construction and testing of a precision calorimeter 1973

1617 An electronic differential precision thermometer 1974

1626 Formation constants of zinc chlorocomplexes in perchlorate medium 1974

«HI MM M HI It \ I IONS

\^2K> The thermodynamics of the formation of complexes of silver with some substituted pyridines 1974

1712 The thermodynamics of the formation of chlorocomplexes of nickel and copper in perchiorate medium 1975

1764 Correlations of the tree-energy and enthalpy changes of the

17S 5 Some thermodynamic aspects of systems relevant to the notation of sphalerite 1976

179h The mechanism of the electrodeposition and dissolution of nickel from chloride

media 1976

1799 An electrochemical investigation of copper cementation on iron 1976

1X20 The thermodynamics of the formation of chlorocomplexes of iron*III), cobaltdl). irondi). manganeseill). and copper(ll) in perchiorate medium 1976 1X22 Stability constants and linear free-energy relations for the platinum-group metals 1976 182X y-picoline adducts of the nickel, copper, and zinc chelates of 2-thenoyltrifluoroacetone 1976

1X39 A valence-bond study of dialkalis and alkali hydrides 1977

1X54 The interaction of pyrite, oxygen, and xanthate 1977

2. Papers

ASHURST. KG., FINKELSTEIN, N.P., and GOOLD, LA. The coordination numbers of cyanide complexes of /inc. cadmium, and mercury in aqueous solution. J. chum. Soc. (A), 1971. pp. 1X99-1902.

BOEYENS. J.C.A. Electrostatic calculation of bond energy. J. S.Afr. Chem. Inst., vol. 26. no. 3. 1973. pp. 94-105.

BOEYENS, J.C.A.. McDOUGALL. G.J.. and SMIT, J.V.R. Crystallography study of the ammonium-potassium 12-molvbdophosphate ion-exchange svstem. J. solid State Chem, vol. 18. 1976. pp. 191-199.

DE VII.I.IF.RS. J PR., and BOEYENS. J.C.A. Crystal structure of a calcium sulphate-urea complex./ Cryst. Mi>l. Struct., vol. 5. 1975. pp. 215-226.

HANCOCK. R.D.. and EVERS. A. Formation constant of Pd(CN)-; . Inorg. Chem., vol. 15. 1976. pp. 995-996.

HANCOCK. R.D.. and F1NKKLSTEIN. N.P. n and rr-bonding in the stabilities of

HANCOCK. RD..FINKEI.STEIN.N.P.. and EVERS, A. Stabilities of the cyanide complexes of the monovalent croup IB metal ions in aqueous solution. J. inorg. nucl. Chem., vol. 34. 1972. p;i. 3474-3751. '

HANCOCK. R.D.FINKF.I.STE1N, N.P. and LVERS. A. Ligand-field theory and metal-ligand force constants. Inorg. nucl. Chem. Lett., vol. 35. 1973. pp. 2558-2561.

HANCOCK. R.D . FINKELSTEIN. N.P.. and EVERS. A. Linear free energy relationships in aqueous complex-formation reactions of the

HANCOCK. R.D . FINKELSTEIN. N P.. and EVERS. A. Some observations on a recent determination of the stabilitv of the dicyanocuprate(l) ion. J. inorg. nucl. Chem.. vol. 38. 1976. pp. 343-344.

HANCOCK. R.D.. and MARSICANO, F. The chelate effect: a simple quantitative approach. J. Chem. Soc., Dalton Trans., no. 12. 1976. pp. 1096-1098.

HANCOCK. R.D.. and MARSICANO. F. The linear free-energy relation in the thermodynamics of complex formation. Part I. Correlations involving enthalpy changes on complex formation of silverd) and mercurydl «with soft' donor ligands. /. Chem. Soc., Duhon Trans., no. 1976. pp. 1832-1837. MARSICANO. F.. and HANCOCK. R.D. A potentiometric and calorimetric study of the thermodynamics of formation of some of the complexes of the

SCOTT, P.D.. GLASSER. D.. and NICOL, M.J. Thermal determination of the kinetics of the irondllHindi) redox reaction in chloride solution./. Chem. Soc., Farad. Tram. I, vol. 71, no. 7.1975. pp. 1413-1421.

SCOTT. P.D.. WILLIAMS, D.F.. and GLASSER, D. The thermal determination of liquid phase kinetics. S.Afr. J. Sci., vol. 70, no. 1. 1974. pp. 10-12.

Programme No. 502

Research and development of equipment for ore-dressing processes and new concepts in ore-dressing (excluding flotation and comminution)

1. Reports 51H The prediction of gravity or inertial separation efficiencies from heavy-liquid tests and Tromp-type efficiency curves. An improved method 1969 1847 A pilot-plant investigation of a kinetic model for flotation 1976

2. Papers GOOLD. 1 A.. LIN. I.J.. LOVELL, V.M.. and FINKELSTEIN, N.P. Oil-levitation extraction: a variation of flotation. J. S.Afr. Inst. Min. Metal!., vol. 76. spec, issue. Oct. 1975. pp. 132-134. KELEGHAN. W. Some potential applications of wet high-intensity magnetic separation./ S.Afr. Inst. Min. Metall.. vol. 76, spec, issue. Oct. 1975. pp. 108-110. KELEGHAN. W.T.H. WHIMS for low-grade uranium. Nucl. Active, no. 16. Jan. 1977. pp. 3-5.

LEVIN. J. Mixing and sampling procedures used at the National Institute for Metallurgy, South Africa. SAMPLING IN THE MINERAL AND METALLURGICAL PROCESSING INDUSTRIES. Institution of Mining and Metallurgy. London, the Institution, 1973. pp. 28-37.

LIN. I.J., and FINKELSTEIN, N.P. The application of magnetohydrostatic separation to metallurgical processes. /. S.Afr. Inst. Min. Metall., vol. 76, spec, issue. Oct. 1975. pp. 11 l-l 12. LOVED AY, B.K. The prediction of gravity or inertial separation efficiencies from heavy-liquid tests and Tromp-type efficiency curves. An improved method. Trans. Instn Min. Metall., vol. 79, no. 763. Jun. 1970. pp. CI37-CI40.

'». MM PUBLICATIONS

McNALLAN. M.J.. SEE. J.B.. OBERTEUFFER. J.A.. -id RUSSELL. K.C. Treatment of steelplant effluents by high gradient magnetic separation. Iron Steel Engr, vol. 53. no. 1. 197t>. pp. 40-44.

OVERBEEK. P.W. An assessment of the efficiency of the Dryflo concentrator by the use of specific gravity markers. J. S.Afr. Inst. Mm. Met all., vol. 76. spec, issue. Oct. 1975. pp. 120-122.

.?. Patent Physical separation of materials. S.Afr. Pat. 70/2765. 24th Apr.. 1970.

Programme No. 503

Fundamental investigations of the simulation, optimization, and control of extractive-metallurgical processes and computation techniques I. Repnrts

327 Information theory and the design of experiments 1968

1025 An introduction to stochastic differential equations. Abbreviated lecture notes 1971 1454 A dynamic model for the extraction bank of Purlex plants 1972 1477 The control of Purlex plants 1972

2. Papers KING. R.P. Some problems in chemical reactor analysis with stochastic features. / & EC Fundamentals, vol. 9, no. I. Feb. 1970. pp. 190-191.

KING. R.P. Continuous flow systems with stochastic transfer functions. II. Solution by the associated Kolmogorov equation. Chem. Engng Set., vol. 26, no. 5. May !97I. pp. 729-737.

KING. R.P. Continuous flow systems with stochastic transfer functions. HI. Stationary operation with chemical reaction. PROCEEDINGS AND INTERNATIONAL SYMPOSIUM ON CHEMICAL REACTION ENGINEERING. Amsterdam. Elsevier Publishing Co.. 1972. pp. B4-35-B4-46.

KING. R.P. Applications of stochastic differential equations to chemical engineering problems — an introductory review. Chem. Engng Commun., vol. I, no. 4. Nov. 1974. pp. 221-237.

KING. R.P.. GLASSER. D., and STONE, S.L. The optimal catalyst-concentration profile for bifunctional catalvsts. Journal ofOptimization Theory and Application, vol. 10, no. 2. Aug. 1972. pp. 94-108.

KING. R.P., WOODBURN. E.T.. COLBORN, R.P., EDWARDS. R., and SMITH, W.E. Dynamic testing oi mineral processing equipment using radioisotopes. NUCLEAR TECHNIQUES AND MINERAL RESOURCES. International Atomic Energy Agency. Vienna, the Agenc. 1969. pp. 117-127.

PAYNTER. J.C.. LOVEDA Y. B.K.. and ROBINSON, C.G. Optimization studies on the design of a processing plant for a large mining venture. APPLICATION OF COMPUTER METHODS IN THE MINERAL INDUSTRY. Salomon, M.D.G., and Lancaster, F.H. (eds.). Johannesburg, South African Institute of Mining and Metallurgy. 1973. pp. 171-176.

in MM PUBLICATIONS

Programme No. 504

Research and development of analytical techniques and methods for extractive metallurgy

I. Reports

158 Aerosol formation with a high-speed spinning surface 1967

264 A new detector unit for the Techtron model AA3 atomic-absorption

spectrophotometer 1967

439 The determination of free acid in the presence of hydrolysable cation;: 1968

465 The determination of aminoid nitrogen in organic compounds by the Kjeldahl

method 1969

497 The determination of ferric iron using Titron 1969

501 The volumetric determination of chloride and bromide using mercurous perchlorate 1969 965 The spectrophotometric determination of phosphate in leach residues and solutions 1970 1049 Exchange visit to the Institut fur Spektrochemie und Angewandte Spektroskopie in Dor'mund, West Germany 1970

1106 Computerization of atomic-absorption data with the Olivetti Programma 101 1970

1163 The computer programming of atomic-absorption measurements on the Olivetti Programma 101 1970

1172 A visit to Outokumpu Oy Research Laboratory in Finland 1970

1257 Aspects of the Seventh X-ray Analytical Conference, Durham, September 1970 1971

1305 The determination of total sulphur in the dust from nylon thread 1971

1467 The spectral analysis of solutions. 1. The analysis of rare-earth minerals 1972

1556 The spectral analysis of solutions. 2. The analysis of leach liquors, concentrates, slags, and residues 1973 1581 The computer calculation, from fundamental parameters, of influence coefficients for X-ray spectrometry 1974

1592 The determination of line intensities in the presence of interfering spectra in dispersive X-ray-fluorescence spectrometry 1974

1607 The analysis of ion-exchange resins by X-ray fluorescence 1974

1621 Correction for matrix effects in the analysis of solutions by X-ray-fluorescence spectrometry 1974 1779 A summary of work done on the concentration of andalusite from deposits in the western Transvaal 1976

1783 The spectrographic determination of minor and trace elements in copper, lead. and zinc concentrates 1976

1784 A single-standard calibration method for use in analysis by X-ray-fluorescence spectrometry 1976

17X7 The determination, by atomic-absorption spectrophotometry, of trace elements in sulphide concentrates 1976

1788 A computer programme for emission-spectrographic calculations 1976

1790 The rapid determination of manganese, vanadium, and aluminium by instrumental neutron-activation analysis 1976

1792 The determination, bv instrumental neutron-activation analysis, of some trace elements in sulphide ores and concentrates 1976

1794 The application of three-phase liquid-liquid extraction to the analysis of bismuth and tellurium in sulphide concentrates 1976

1795 The determination of minor and trace elements in the le?ch liquors from anode sludges 1976

1797 A rapid-atomic absorption method for the determination of silver in sulphide ores iind concentrates 1976

1798 Interferences in the determination, by atomic-absorption spectrophotometry, of copper, lead, and zinc in sulphide concentrates 1976

1803 The preparation and analysis of minerals for use as reference material. Progress report no. 3. 1976

1808 Spectrophotometry determination (with pyrocatechol violet as chromogenic agent) of aluminium in zirconium metals and in the residues from anode sludges 1976

1809 The analysis, by flameless atomic-absorption spectrophotometry, of pure selenium and tellurium 1976

1815 The commissioning of an induction-coupled plasma system and its application to the analysis of copper, lead, and zinc concentrates 1976

1817 The rapid determination by X-ray fluorescence spectrometry of tungsten in

tungsten oies and concentrates 1976

1825 The full automation of a Philips 1220 X-ray spectrometer 1976

1826 Dithiocarbamate as a releasing agent in the atomic-absorption determination

of noble metals in organic media 1976

1830 The determination of iron in zircon beach sands and its teachability 1977

1834 The analysis of slag and silicate samples with a fully automatic sequential X-ray spectrometer 1976 1836 The analysis of pilot-plan: products for copper, zinc, and lead with the Telsec Lab-X-250 Analyser 1977 1837 The rapid and precise determination of noble metals in matte-leach residues by atomic-absorption spectrophotometry 1976

1838 An investigation of the atomic-absorption spectrophotometric measurement of the elements that form gaseous hydrides and their determination in metal sulphide concentrates 1976 N!M Pt'Bl 1CATIONS

1840 The spectrophotometríc determination of total uranium in silicate ores and leach liquors by use of bromo-PADAP 1976 1841 The determination of acid-soluble uranium in silicate ores and solutions 1976

! 852 A revised method for the pressure dissolution of platiniferous materials by the sealed-tube technique 1976 1857 The determination of some trace-elements in sulphide concentrates by spectrophotometry 1977 1861 The determination of some impurities in zirconium metal by instrumental neutron-activation analysis 1976 1864 The preparation of primary standard solutions for each of the noble metals 1977 1865 A sensitive method for the measurement of osmium by atomic-absorption spectrophotometry 1977

1869 The separation and determination of trace elements in ion ore 1977 1872 The determination of mercury by cold-vapour atomic-absorption spectrophotometry 1977 1873 The rapid reduction of gamma-ray spectra with a desk-top calculator 1977

1875 The determination of tungsten and iron in ferrotungsten alloys by X-ray-fluorescence spectrometry 1977 1883 The determination of iron, chromium, titanium, and tungsten in ores and other materials, by X-ray-fluorescence spectrometry 1977 1886 A rapid method for the determination of fluoride in geological samples 1977

2. Papers

AUSTIN, C.E.. and STEELE. T.W. The computer calculation, from fundamental parameters, of influence coefficients for X-ray spectrometry. ADVANCES IN X-RAY ANALYSIS. Pickles, W.L., Barrett. C.S., Newkirk, J.B., and Rund, CO. (eds). London, Plenum Press, 1975. vol. 18. pp. 362-371.

STEELE. T.W.. and GUERIN, b.D. A new graphite rod for flameless atomic-absorption spectroscopy. Analyst, vol. 97, no. 1150. Jan. 1972. p. 77. WATTERSON. J.I.W. Optimisation of irradiation and decay times in nuclear activation analysis./ Radioanalyt. Chem., vol. 2<>. 1975. pp. 135-150.

Programme No. 505 Preparation of internal and secondary reference materials for extractive metallurgy I. Reports

331 A literature survey of the preparation of standard rock samples 1968 332 Collection and preparation of standard rock samples 1968 1322 The preparation and analysis of minerals for use as reference material 1971 NIM PUBLICATIONS

1351 Preliminary report on the analysis of the six NIMROC geochemical standard samples 1972

1552 The preparation and analysis of minerals for use as reference material. Progress Report No. 2 1973

1609 An interlaboratory analysis of two ferrochromium slags 1974

1649 The establishment of preferred values for a series of fluorspar samples 1974

1696 The preparation and certification of a reference sample of a precious metal ore 1975

1719 An evaluation of the X-ray-fluo:escence analysis of rocks and silicates under routine conditions 1975 1762 The determination, by instrumental neutron-activation analysis, of some elements in the NIMROC standard reference materials 1975

1803 The preparation and analysis of minerals for use as reference material. Progress report no. 3. 1976

1807 The establishment of preferred values for a series of rare-earth samples 1976

Programme No. 506

Development of mineralogical techniques and methods for extractive metallurgy

1. Reports

103 Techniques for the examination of inorganic compounds on an infrared spectrograph 1966

105 Report on overseas visit 1966

268 A power-failure safety device and operational aid for the electron microprobe 1968 2. Papers

GASPARRINI. E. Electron-microprobe quantitative analysis by energy-dispersive spectrometry PROCEEDINGS, ELECTRON MICROSCOPY SOCIETY OF SOUTHERN AFRICA, PRETORIA CONFERENCE. Durban, the Society, 1975. vol. 5. pp. 121-122.

GASPARRINI. E. The energy-dispersive spectrometer: a new tool of investigation for the earth scientist. Miner. Sci. Engng, vol. 8. no. 1. Jan. 1976. pp. 3-22.

HIEMSTRA. S.A. Photomicrography. Miner. Sci. Engng, vol. 1. no. 2. Jul. 1969. pp. 34-50.

LIEBENBERG. W.R. Mineralogy and the metallurgist. Miner. Sci. Engng, vol. 2, no. 4. Oct. 1970. pp. 3-23.

MIHÁLIK. P. The electron microprobe X-ray analysis. S.Afr. chem. Process., vol. 2. no. 2. Apr-May 1967. pp. 37-»2.

MIHÁLIK, P. An aid for the alignment, positioning, and checking of the beam in the electron micropmbe. Lab. Practice, vol. 19. no. 3. Mar. 1970. p. 288.

MIHÁLIK. P.. and HIEMSTRA, S.A. Apparatus permitting visual observation during the vacuum-deposition of thin films. Lab. Practice, vol. 21, no. 4. Jan. 1972. pp. 29-30. SIM PUBLICATIONS

RASMUSSEN. S.E.. SELLSCHOP. J.P F.. FESO. H.W., and HAWKINS. DM. Characterization of sedimentary strata using trace element patterns. PROCEEDINGS TWELFTH INTERNATIONAL SYMPOSIUM ON THE APPLICATION OF COMPUTERS AND MATHEMATICS IN THE MINERALS INDUSTRY. Johnson, T.B., and Gentry T.W. (eds.). Colorado. Colorado School of Mines. 1974. pp. D41-D56.

VON RAHDEN. H.V.R. A modified halide-disc holder for infrared spectrometry. J. scientific Instrwn.. vol. 44. 1967. p. 168.

Programme No. 507

Development of nuclear-activation techniques as methods for the analysis of minerals and metals

I. Reports

41 Table of the isomeric states of stable nuclides 1966

80 The resolution of photopeaks obtained from the products of stable nuclides

irradiated by neutrons 1966

152 The determination of beryllium by irradiation with gamma rays 1967

162 The growth of radioactivity in uranium after separation from its daughter

products 1967

177 Compensating for flux variation in neutron-activation analysis 1967

236 The determination of some of the major constituents of ores and minerals by

fast-neutron activation analysis 1967

445 The use of californium-252 fission neutron sources 1969

474 The LAEA Conference on the Use of Nuclear Techniques in the Prospecting

and Development of Mineral Resources 1969

530 The measurement of 14MeV neutron fluxes from a neutron generator 1969

889 The simultaneous determination, by instrumental thermal-neutron activation annl vsis. of some selected trace elements likely to be present in lunar material 1969 891 Calibration of the 'Universal Voltronics' power supply for the neutron generator manufactured by Accelerators Incorporated 1969

967 Automatic timing of the neutron-generator counting station 1970

987 Rhythmic-activation analysis 1970

1005 Modifications to the Intertechnique 4000-channel analyser 1970

1013 The instrumental neutron-activation analysis of samples taken at different levels of the E.R.P.M. Mine 1970 1476 A magnetic-tape-oriented system for data reduction in neutron-activation analysis 1972

1563 Neutron-activation analysis of samples from the Kimberley Reef conglomerate 1973

1636 Trace elements in diamonds from the Premier. Finsch, and Jagersfoniein Mines, and their pctrogenetic significance 1975 MM PI B! 1C ATIONS

1638 The determination of trace elements in natural diamonds by instrumental neutron-activation analysis 1975

1639 The determination, by 14 MeV neutron-activation analysis, of small amounts of oxygen and silicon in diamonds 1974

165 2 The identification of diamonds from Premier. Finsch. and Jagersfontein Mines. hv statistical analysis of data obtained from instrumental neutron-activation analysis 1975

1670 Neutron-activation analysis of routine mineral-processing samples 1974

1703 The geochemistry of some selected South African kimberlites and associated heavy minerals 1976

1790 The rapid determination of manganese, vanadium, and aluminium by instrumental neutron-activation analysis 1976

1792 The determination, by instrumental neutron-activation analysis, of some trace elements in sulphide ores and concentrates 1976

1X73 The rapid reduction of gamma-ray spectra with a desk-top calculator 1977

2. Papers

BIBBY. DM., and RASMUSSEN. S. Reactor neutron flux monitoring with iron foils. Radiochem. radioanalyt. leu., vol. 9. no. 1. 1972. pp. 1-8.

BIBBY. DM., and RASMUSSEN. S. Performance of a counting head for an automatic sample changer. Radiochem. radioanalyt. Lett., vol. 14. no. 1. 197.3. pp. 9-15.

BIBBY. DM., and SHLLSCHOP. J.P.F. The determination of oxygen and silicon in diamonds by 14 MeV activation analysis. J. radioanalyt. Chem., vol. 22. 1974. pp. 103-111.

PESO. H. W.. BIBBY. DM.. SE1.LSCHOP. J.P.F. and W ATTERSON. J.I.W. The determination of trace-clement impurities in natural diamonds by instrumental neutron-activation analysis. /. radioanalyt. Chem., vol. 17. 1973. pp. 195-216.

PESO. H.W . KABLE, E.J.D.. and GURNEY, J.J. Aspects of the geochemistry of kimberlites from vhe Premier Mine and other selected South African occurrences with particular reference to the rare earth elements. PHYSICS AND CHEMISTRY OF THE EARTH. Ahrem, L.H., Dawson, J.B., Duncan, A.R.. and Erlank, A.J. (eds). Oxford, Peigamon. 1975. vol. 9. pp. 687-707.

GURNEY. J.I.. FESO. H.W.. and KABLE. E.J.D. Clinopvroxene-ilmenite xenolites from kirnberlites. LESOTHO KIMBERLITES. Nixor, PH. (ed,). Maseru. Lesotho National Development Corporation, 1973. pp. 283-254,

HAWKINS. DM., and RASMUSSEN. S.E. Use of discriminant analysis for the classification of strata in sedimentary successions. Math. Geol., vol. 5, no. 2. 1972. pp. 163-177.

KABUL. E.J.D.. FESO. H.W.. andGURNEY. J.J. The significance of interelement relationships of some elements in South African kimberlites. PHYSICS AND CHEMISTRY OF THE EARTH. Ahrens, L.H., Dawson. JR., Duncan, A.R., and Erlank, A.J. (eds.). Oxford, Pergamon. 1975. vol.9. pp. 709-734.

KNIGHT. A. Neutron activation analysis. .V.,4/r. Engr. vol 58. no. 585. Feb. 1967. pp. 37. 39. 41.

RASMUSSEN. SE..SELLSCHOP. J.P.F.. FESO. H.W.. and HAWKINS. DM. Characterization of sedimentary strata using trace element patterns. PROCEEDINGS TWELFTH INTERNA TIONAL SYMPOSIUM ON THE APPLICATION OF COMPUTERS AND MATHEMATICS IN THE MINERALS IN DUST,

SELLSCHOP. J.P.F.. BIBBY. DM.. ERASMUS. C.S., and MINGAY, D.W. Determination of impurities in diamond by nuclear methods. DIAMOND RESEARCH 1974. London, Industrial Diamond Information Bureau, 1974. pp. 43-50.

UKEN, E-A. Neutron-activation analysis. Miner. Sci. Engng, vol. 2, no. 2. Apr. 1970. pp. 24-34. UKEN. E-A.. and WILLIAMSON, J.E. Radioactivity build-up of freshly separated radium from the uranium, actinium and thorium series. Radiochim. Acta, vol. 8, no. I. 1967. pp. 60-63.

WATTERSON. J.i.W. Optimisation of irradiation and decay times in nuclear activation analysis. J. Radioanalyt. Chem., vol. 26. 1975. pp. 135-150.

WATTERSON. J.I.W., and HAWKINS. DM. Multivariate techniques for the classification of granites. PROCEEDINGS TWELFTH INTERNATIONAL SYMPOSIUM ON THE APPLICATION OF COMPUTERS AND MATHEMATICS IN THE MINERALS INDUSTRY. Johnson, T.B., and Gentry, D.W. teds). Colorado, Colorado School of Mines, 1974. pp. D57-D76. ZANDERS. J. A.J., BIBBY, DM., and RASMUSSEN, S.E. A simple automatic sample charger for the gamma-rav counting of reactor-irradiated samples. J. Phys. E: scient. Instrum., vol. 6. 1973. pp. 973-975.

Programme No. 508

Research and development of equipment for hydrometallurgical and electrometallurgical processes I. Reports 367 Felix Project: imperfect mixing in continuous leaching at Buffelsfontein uranium plant 1968 ?!(• The performance of a clarifier subject to low-intensity turbulence 1969 517 Radiotracer tests on the pachucas on the uranium plant at Western Reefs Mine 1969 898 The development of a computer programme for countercurrent operations involving liquid-solid solute separations 1970 1693 Research at the National Institute for Metallurgy on the engineering aspects of copper electrowinning 1975 1754 A new three-dimensional anodic electrode for reduced power consumption during the electrowinning of metals 1975 1782 The application of air-sparging techniques to industrial electrodeposition of zinc from acidic zinc sulphate solutions 1976

2. Papers KING. R.P.. WOODBURN. FT., and TE RIELE. W.A.M. The dispersion of material in slowly moving fluids. Can. J. chem. En%ng, vol. 50. no, I. Feb. 1972. pp. 3-8. l.OVF.DAY, B.K. A model for the leaching of non-porous particles. J. S.Afr. Inst. Min. Metall., vol. 76. no. 2. Sep. 1975. pp. 16-19.

ORMROD. G.T.W. The control of aqueous ammonia concentrations by a thermal method. J. CHEMSA, Dec. 1975, pp, 284-286.

Mill NIM PUBLICATIONS

.1. Patents Improvements in and relating to the contacting of liquids and particulate solids. S.Afr. Pat. 69/5623. 28th Aug. 1970. (Also: S.W. Afr. Pat. 70/0100. 28th Aug.. 1970.) Contacting liquids and solids.:S.Afr. Pat. 71/3140.14th Mav. \91].(Aka:S.W.Aft. Pat. 72/0052.5th May. 1972 )

Contacting liquids and solids in countercurrent. S.Afr. Pat. 71/3139.14th Mav. 1971 (Also: Austral. Pat. 472.709. 17th Mav. 1976: Bel. Pat. 783.407. 12th Mav. 1972; Brit. Pat. 1.399.473. 11th Mav. 1972: Can. Pat 978.722.12th Mav. 1972: Fr. Pat. 72 17146.12th Mav. 1972./«/. Pal. 955497.13th Ma>. 1972: Luxembourg Pal. 65.371. 16th May. 1972: Rhodes. Pat.'200/72. 5th May. 1972: 5. W. Afr. Pol 72/005». 5th Mav. 1972: U.S. Pat. ^957.635. 8th May. 1972.)

Equipment for contacting liquids and solids. S.Afr. Pat. 72/4328. 20th June.. 1973. Improvements in equipment for contacting liquids and solids. 5. VV./l/r. Pat. 73/064,20th Jun.. 1973. Improved method of measuring rates of dissolution. S.Afr. Pat. 72/8807. 8th Jan.. 1974. (Also: S.W. Afr. Pat. 74/7. 8th Jan.. 1974.)

Programme No. 509

Research and development ot equipment for pyrometallurgical processes

1. Report

1521 The dissipation of electrical power in the burden of a submerged-arc furnace 1973 2. Papers CHANNON. W.P.. UROUHART. R.C.. and HOW AT. D.D. The mode of current transfer between electrode and slag in the submerfied-arc furnace. J. S.Afr. Inst. Min. Metall.,\o\. 75.no. I.Aug. 1974. pp. 4-7. HAINES. A.K. KING. R.P.. and WOODBURN.E.T. The interrelationship between bubble motion and solids mixing in a gas-fluidized bed. AlChE, vol, 18. no. 3. May 1972. pp. 591-599. UROUHART. R.C.. JOCHENS. PR. and HOWAT. D.D. The dissipation of electrical power in the burden of a submerged-arc furnace. .1IST ELECTRIC FURNACE CONFERENCE PROCEEDINGS. Metallurgical Society of AIME. New York. AIME. 1973. vol. 31. pp. 29-Í8.

Programme No. 510

Research and development of instruments and associated equipment for the measurement and control of extractive-metallurgical processes

I. Reports 67 The application of silicon controlled rectifiers to instruments using half-cycle heating 1966

91 Half-cycle heating applied to an X-rav powder camera 1966 477 Balanced-temperature analysers 1969 489 Thermal analysis. Overseas visit 1969

Mil NIM PUBLICATIONS

1267 The development of an electrodeless conductivity meter 1971

1526 Heat of solution as a control of aqueous-ammonia concentration 1973

1533 Fields of application for dispersive and non-dispersive X-ray-fluorescence

instruments 1973

1591 The inductive measurement of conductivity in slags 1974

1640 A semi-automatic titrimeter for cyanide analysis 1974 1778 An apparatus for the automatic measurement of current efficiencies during the electrodeposition of nickel in chloride media 1976

1818 A microprocessor-based system to control the feed to a ferro-alloy furnace 1976

2. Papers

ORMROD. G.W.T. The control of aqueous ammonia concentrations by a thermal method. Electron. Instrum, vol. 6. no. 8. Aug. 1975. pp. 73. 77, 79.

ORMROD, G.T.W. The control of aqueous ammonia concentrations by a thermal method. J. CHEMSA, Dec. 1975. pp. 284-286.

SOMMER. G., and JOCHENS, P.R. Techniques of micro-thermal analysis based on a thermocouple a> heating source and specimen holder. Miner. Sci. Engng, vol. 3. no. I. Jan. 1971. pp. 3-16.

SOMMER. G. Temperature measurement with thermocouples. Electron. Instrumn, vol. 2, no. 1. Apr. 1971. pp. 2-5.

SOMMER, G.. JOCHENS, PR., and HOW AT. D.D. Solid state circuitry for a microdifferential thermal analyser./. Phys. E; scient. Instrum., vol. I. 1968. pp. 1116-1118.

SOMMER. G.. and MILLER. R.P. A hot stage microscope incorporating a differential thermal analysis unit./ saent. Instrum., vol. 43, no. 5. May 1966. pp. 293-297.

SOMMER. G.. and SANDER. H.W. Balanced temperature analysers. 2nd INTERNATIONAL CONFERENCE ON THERMAL ANALYSIS, I9f>8. Scnwenker, R.F. and Gam, P.D. (eds.). New York. Academic Press. 1969. vol. 1. pp. 163-175.

ZANDERS. J.A.J. Single-ended differential instrumentation amplifier. Electron. Instrumn, vol. 4. no. 1 1. Mar. 1974. pp. 2-3.

ZANDERS, J.A.J. An electronic differential precision thermometer. Electron. Instrumn, vol. 4. no. 12. Apr. 1974. pp. 24-25, 28.

.?. Patents

Apparatus and method for differential thermal analysis. S.Afr. Pal. 67/5680,16th Oct., 1968. (Also: Brit. Pat. 1.240.897. 17ih Sep.. 1968; U.S. Pat. 3.675.465. 7th Oct., 1969; W. Ger. Pat. P. 17 98 283.1.)

Improved method of measuring rates of dissolution. S.Afr. Pal. 72/8807, 8th Jan.. 1974, (Also: S.W.Afr. Pal. 74/7. 8th Jan.. 1974.)

Improvements relating to the controlling of processes. S.Afr. Pat. 73/1213. 21st Feb.. 1974. MM PUBLICATIONS

Programme No. 511

General studies of electrochemistry in extractive metallurgy

I. Rrporis

I f> The rotating-disc system and its applications in the dissolution of gold I 966

15i >9 The instrumentation developed for electrochemical studies of the leaching of uranium dioxide 1973 I "78 An apparatus for the automatic measurement of current efficiencies during the electrodeposition of nickel in chloride media 1976

17i><, [ (,,_ mechanism of the electrodeposition and dissolution of nickel from chloride media 1976

179V \n electrochemical investigation of copper cementation on iron 1976

I SI H) An electrochemical investigation of the dissolution and passivation of platinum in acid solutions 197

1858 The kinetics ;.nd mechanism of the non-oxidative dissolution of some iron sulphides in aqueous acidic solutions 1976

1859 Increased current efficiency during electrodeposition of manganese from sulphate electrolytes 1976

I SSI) The electrochemical reduction of silver chloride and its application to the refininc of silver 1977

2. I upers

NTCOI.. M.J. The new electrochemistry and its part in a new technology. Probe 71-2. 1972. pp. 23-26.

MCO!.. M.J. Mechanism of aqueous reduction of chalcopyrite bv copper, iron and lead. Trans. Inst. Mm. Mt'tali. vol. K4. 1975. pp. C206-C209.

PHILIP. H.I.. and MCOL. M.J, Underpotential deposition and its relation to the anomalous deposition of metals in alloys. J. Elecirnanalyt. (.'hem., vol. 70. 1976. pp. 233-237.

.?. I'aient

Improved method of measuring rates of dissolution. S.Afr. Pat. 72/8*1)7, Nth Jan.. 1974. (Also: S.W. Afr. Put. 74 7. 8th Jan.. 1974.)

Programme No. 512

Engineering studies of the flotation process and equipment, including modelling, scale-up, optimization, and control

I. Reports

l>96 An improved distributed-paramcter model for the kinetics of mineral flotation 1970

U3d A computer programme for the simulation of the performance of a flotation plant. Revised report 1973

I in NIM PUBLICATIONS

1517 Computer-controlled flotation plants in Canada and Finland 1973

1553 Characterization of the flotation properties of fluorspar from small-scale batch and pilot-plant tests 1973

l^fO Application of u flotation model to an industrial plant 1973

1567 Estimation of the parameters in the distributed-constant flotation model 1974

I56S A computer programme for the estimation of parameters in flotation 1973

1573 A pilot-plant investigation of a flotation model 1974

1753 Full-scale flotation-plant data for modelling purposes 1975

IS47 A pilot-plant investigation of a kinetic model for flotation I97f»

2. Papers

ENGEI BRECHT. J. A., and WOODBURN. E.T. The effects of froth height, aeration rate, and gas precipitation on flotation./ S.Afr. Inst. Min. Metall., vol. 76. spec, issue. Oct. 1975. pp. 125-131.

KING. R.P. Flotation research work of the NIM Research Group, and the Department of Chemical Engineering. University of Natal. J. S.Afr. Inst. Min. Metall., vol. 72. no. 9. Apr. 1972. pp. 235-345.

KING. R.P. Model for the design and control of flotation plants APPLICA TION OF COMPUTER METHODS IS THE MINERAL INDUSTRY. Salomon, M.D.G., and Lancaster, F.H. feds). Johannesburg. South African Institute of Mining and Metallurgy. 1973. pp. 341-350.

KING. R.P. On-line digital computer control of slurry conditioning in mineral flotation. Automatica. vol. 10. no. I. Jan. 1974. pp. 5-14.

KING. R.P. Simulation of flotation plants. Trans. Soc. Min. En^rs AIME, vol. .258. no. 4. Dec. 1975. pp. :86-293.

KING. R.P.. HATTON. T.A.. and HULBERT. D.G. Bubble loading during flotation. Trans. Instn Min. Metall.. Sect. C. vol. S3, no. SI I. Jun. 1974. pp. CI I2-CII5.

I OVEDAY. B.K Analysis of froth flotation kinelics. Trans. Instn Min. Metall.. vol. 75. Sec. C. Sep. 1966. pp. 219-225.

I.OVEDAY. B.K.. and MARCHANT. G.R. Simulation of multicomponent flotation plants. APPLICATION OF COMPUTER METHODS IN THE MINERAL INDUSTRY. Salomon, M.D.G., and Lancaster. F.H. U'tls.). Johannesburg. South African Institute of Mining and Metallurgy. 1973. pp. 325-330.

WOODBURN. E.T.. KING. R.P.. BUCHALTER. E.M.. and PIPER. S.E. Integrated grinding and flotation control-computational problems in an optimum decision making model. A DECADE OF DIGITAL COMPUTING IN THE MINERAL INDUSTRY. Weiss, A. led.). New York. AÍME. 1969. pp. 695-72S.

WOODBURN. E.T.. KING. R.P.. and COLBORN. R.P. The «ííect of panicle size distribution on the performance of a phosphate flotation process. Metall. Trans., vol. 2. no. II. Nov. 1971 pp. 3163-3174.

104 N1M PUBLICATIONS

Programme No. 513

Development of solvent-extraction, ion-exchange, and other reagents for hydrometalkirgy

I. Reports 1793 The kinetics of mechanism of solvent extraction of copper by LIX 64N and KELEX 100 1976 1828 y-picoltne adducts of the nickel, copper, an J zinc chelates of 2-thenoyitrifluoroacetone 1976 1853 Chloromethylation of polystyrene resins 1977 1856 A study of model systems in anion exchange 1977 2. Papers

BOEYENS. J.C.A.. McDOUGALL. G.J.. and SMIT, J.V.R. Crystallographic study of the ammonium-potassium 12-molybdophosphate ion-exchange system. J. solid Stale Chem., vol. 18. 1976. pp. 191-199.

MARSICANO F.. and HANCOCK. R.D. A potentiometric and calorimetric study of the thermodynamics of formation of some of the complexes of the

Programme No. 514

General chemical studies of high-temperature processes in extraclve metallurgy .?. Patent Apparatus and method for differential thermal analysis. S.Afr. Pat. 67/5680, 16th Oct., 1968. (Also: Brit. Pat. 1.240.897. 17th Sep.. 1968: U.S. Pat. .1.675,465. 7th Oct., 1969; W. Ger. Pat. P.17 98 283.1.)

Programme No. 515

Engineering studies of comminution and of associated classification processes and equipment, including modelling, scale-up, optimization, and control

/. Reports

232 A comparison of open-circuit and closed-circuit grinding for the contnl of •lime formation 1967 416 Comminution kinetics: batch tests in small mills, and model development 1968 996 An improved distributed-parameter model for the kinetics of mineral flotation 1970 1436 A computer programme for the simulation of the performance of a flotation plant. Revised report 1973 1517 Compuier-contrilled flotation plants in Canada and Finland 1973

inn MM PUBLICATIONS

1553 Characterization of the flotation properties of fluorspar from small-scale batch and pilot-plant tests 197?

1562 Application of a flotation model to an industrial plant 1973

15f>7 Estimation of the parameters in the distributed-constant flotation model 1974

1568 A computer programme for the estimation of parameters in flotation 1973

1573 A pilot-plant investigation of a flotation model 1974

1753 Full-scale flotation-plant data for modelling purposes 1975

2. Papers GUEST. R.N. A laboratory investigation of the importance of the circulating load in the contr-' of particle-size distribution. J. S.Afr. Mech. Enj, vol. 22, no. 2. Feb. 1972. pp. 46-51. KING. R.P. An analytical solution to the batch-comminution equation./ S.Afr. IQ ST. Min. Metall., vol. 73. no. 4. Nov. 1972. pp. 127-13!.

LIN. I.J..NADIV.S., and GRODZIAN.D.J.M. Changes in the state of solids and mechano-chemical reactions in prolonged comminution processes. Miner. Sci. Engng vol. 7, no. 4. Oct. 1975. pp. 314-336.

LOVEDAY. B.K. An analysis of comminution kinetics in terms of size-distribution parameters. J. S.Afr. Inst. Min. Metall., vol. 68, no. 3. Oct. 1967. pp. 111-131. LOVEDAY. B.K., and TOLMAY, A.T. The development of a mathematical model for large-scale mills. CHEMECA 70. Australian Institute of Chemical Engineers. Sydney, the Institute, 1971. pp. 141-151.

STANLEY. G.G. Mechanisms in the autogenous mill and their mathematical representation. J. S.Afr. Inst. Min. Metall., vol. 75, no. 4. Nov. 1974. pp. 77-98.

STANLEY. G.G. Considerations in the application of autogenous milling./. S.Afr. Inst. Min. Metall., vol. 76, spec, issue. Oct. 1975. pp. 53-55.

Programme No. 600

Selection of materials and optimization for extractive-metallurgical processes

I. Report

1861 The determination of some impurities in zirconium metal by instrumental neutron-activation analysis 1976

Programme No. 940

Miscellaneous economic, cost, and commodity studies

I. Reports 109 The possibility of establishing a local cost index for the estimation of metallurgical and chemical plant 1967 884 Review of information on the mineral industry of Mocambique 1970 MM PIBLlCATiONS

1310 South African costs of industrial equipment for the metallurgical industry 1971

1529 South African costs of equipment for the metallurgical industry (1972) 1973

1559 A cost assessment of the production of elemental sulphur by chlorination

roasting 1973

1644 Prospects for the recovery of mineral', from the sea 1974

1741 South African costs of equipment for the metallurgical industry 1975

1750 A review of the present and future development of sulphur production in South

Africa 1975

2. Papers

GRANVILLE. A. The recovery of deep-sea minerals: problems and prospects. Miner. Sci. Engng, vol. 7. no. 3. Jul. 1975. pp. 170-188. ROBINSON. R.E. The utilization and conservation of mineral resources. S.Afr. J. Sci., vol. 68, no. 4. Apr. 1972. pp. 105-110. VAN RENSBURG. W.C.J. Changing patterns in the World's supply of minerals. Miner. Sci. Engng, vol. 6, no. 3. Jul. 1974. pp. 142-153.

Programme No. 960

Minerals manpower, training, and recruitment

1. Report

1483 The South African manpower requirements in extractive metallurgy 1972

2. Paper

ROBINSON. R.E. Would you encourage your son to undertake a mining career? Coal, Gold base Miner., vol. 19. no. 3. May 1971. pp. 19-27.

Programme No. 999

Miscellaneous unallocatable projects

I. Reports

IS The 8th Commonwealth Mining and Metallurgical Congress - Australasia - 27th February to 15th April. 1965. Visits to various places in Australia and Tasmania 1966

25 Ouantitative mineralogical examination of six samples of pulverized mine ores submitted by the Chemical Engineering Group. C.S.J.R. 1966

34 Oualitat ve electron-microprobe investigation of cobalt-gadolinium intermeuiilic compounds 1966

53 Differential thermal investigation of Moore-filter residues for the Anglo American Research Laboratory 1966

66 The study of propagation modes effective in around-the-World radio-wave propagation in the 15-Mc/s to 30-Mc/s band 1966

1(17 NIM PUBLICATIONS

104 The infrared examination of microlite, muscovite, apatite in the presence of carbonate, asbestos, paragonite. and various uranium salts 1967 113 The identification, by means of the electron microprobe, of an opaque mineral from the Artonvilla Mine, Messina 1966 132 Mineralogical and spectrographic investigation of a mineral concentrate from Koster. western Transvaal 1967 260 The electron-microprobe investigation of two samples of magnetite catalyst from Saso' 1967 286 A mineralogicai and petrographic study of the pre-Transvaal rocks in borehole K.l. Koster district, western Transvaal 1968 287 A preliminary examination of kieselghur from Witdraai, south of Postmasburg 1968 313 The qualitative investigation of inclusions in free-cutting steel with the electron microprobe 1968 943 An electron-micrcprobe investigation of chiastolite crystals 1970 1697 A petrographic and mineralogical investigation of silica samples from the farm Elandskraal 470 JO, Rustenburg district 1975 1703 The geochemistry of some selected South African kimberlites and associated heavy minerals 1976 1812 List of unrestricted NIM reports and papers published during the first decade of NIMs existence (1966 to 1975) 1976

2. Papers

BERNING, J.. COOKE, R., HIEMSTRA, S.A. and HOFFMAN, U. The Rossing uranium deposit. South West Africa. Econ. Geot., vol. 71. 1976. pp. 351-368.

BROOKS. H.C., and PAUL, R.L. Densities and excess volumes of fused halides.Z.MiiHr/orjcJr., vol. 30a. 1975. pp. 64-68.

CZAMANSKE, G.K.. and MIHÁLIK, P. Oxidation during magnetic differentiation. Jinmoskia Complex. Oslo area. Norway: Part 1. The opaque oxides./. Petrol., vol. 13,no.3.1972. pp. 493-509.

DE WAAL, S.A. Interference-folding of Bushveld Igneous Complex age in the Transvaal System north of Marble Hall, Transvaal. Johannesburg, Geological Society of South Africa, Spec. Pub. 1, 1970. pp. 283-298.

DE WAAL, S.A., and CALK, L.C. The sulphides in the garnet pyroxenite xenoliths from Salt Lake Crater, Ohio/. Petrol., vol. 16. no. I. Feb. 1975. pp. 134-153.

JOCHENS, P.R. Technology transfer between a State-sponsored research institute and industry. PROCEEDINGS OF THE SYMPOSIUM ON TECHNOLOGY TRANSFER. South African Council for Scientific and Industrial Research. Pretoria, CSIR, 1974. pp. 38-52. KNIGHT, A. Nuclear power reactors in Britian.5./l/r. Engr, vol. 57, no. 582. Nov. 1966. pp. 57-61.

LASCHINGER. J.E. Focus on vital role of the National Institute for Metallurgy. S.Afr. Engr, vol. 59, no. 602. Jul. 1968. pp. 24-29.

LASCHINGER. J.E. The National Institute for Metallurgy. S.Afr. Min. EngngJ., vol. 81.24th Mar., 1969. pp. 279-287.

ION NIM PUBLICATIONS

PAUL. R.L.. and BROOKS. H.C. Energies of mixing of molten silver bromide-alkali bromide system. Inorg. nucl. Chem. Lett., vol. 8. no. 7. 1972. pp. 629-631.

PAUL. R.L.. and BROOKS. H C. Binary silver bromide-alkali bromide melts. Calculated and measured energies of mixing. Inorg. Chem., vol. 13. no. 3. 1974. pp. 683-690.

ROBINSON. R.E. The fifth James Moir memorial lecture. S.Afr. chem. Process., Jun.-Jul. 1967. pp. CP72-CP84. ROBINSON. R.E. The case for national research in mineral processing. J. S.Afr. Inst. Min. Metall., vol. 76. no. 3. Oct. 1975. pp. 196-213. ROBINSON. R.E. Metallurgical problems in the utilization of Southern Africa's resources. RESOURCES OF SOUTHERN AFRICA TODAY AND TOMORROW. Baker, G. (ed.). Johannesburg. Associated Scientific and Technical Societies of Southern Africa. 1976. pp. 308-318.

VON RAHDEN. H.VR., and DICKS. L.W.R. Descloizite. mottramite, and vanadinite from South West Africa — an infrared and X-rav studv. Am. Mineralogist, vol. 52, Jul.-Aug. 1967. pp. 1067-1076.

Programmes on Uranium Involving NIM Staff

Beneficiation of ore for the recovery of uranium 2. Paper KELEGHAN. W.T.H. WHIMS for low-grade uranium. Nucl. Active, no. 16. Jan. 1977. pp. 3-5. Fundamental studies on the leaching of uranium ores 1. Reports 44 The zero point of charge of uranium dioxide and uraninitc 1966

1031 The dissolution of UOj as an electron-transfer reaction 1970 1144 Three-dimensional predominant-area and solubility diagrams for the uranyl carbonate and uranyl sulphate systems at 25°C. 1971 1205 The adsorption of uranyl species on pyrophyllite. quartz, and acid-treated South African uranium ores. A preliminary investigation. 1971 1380 An electrochemical model for the leaching of uranium dioxide 1972 1448 A potentiostatic study of the anodic dissolution of uranium dioxide in aqueous solutions 1972 1550 A fundamental study of the dissolution in acid solutions of uranium minerals from South African ores 1973 2. Papers

LAXEN. PA. A kinetic study of the dissolution of uraninites in sulphuric acid. RESEARCH IN CHEMICAL AND EXTRACTION METALLURGY. Australasian Institute of Mining and Metallurgy. Sydney, the Institute. 1967. pp. 181-192. I.AXEN. PA. The dissolution of UO, as an electron-transfer reaction, THE RECOVERY OF URANIUM. International Atomic Energy Agency. Vienna, the Agency. 1971. pp. 321-330.

i in MM PUBLICATIONS

NEEDES. C.R.S.. NICOL. M.J.. and FINKELSTEIN. N.P. An electrochemical model for the leaching of uranium dioxide. II. Alkaline carbonate media. LEACHING AND REDUCTION IN HYDRO METALLURGY. Burkin. A.R. (ed). London. Institution of Mining and Metallurgy. 1975. pp. 12-19.

NICOL. M.J.. and NEEDES. C.R.S. The anodic dissolution of uranium dioxide. In perchlorate solutions. Electmchim. Acta. vol. 20. no. 8. Aug. 1975. pp. 585-589.

NICOL. M.J.. NEEDES. C.R.S.. and FINKELSTEIN. N.P. An electrochemical model for the leaching of uranium dioxide. I. Acid media. LEACHING AND REDUCTION IN HYDROMETALLURGY. Burkin, A.R. (ed.). London. Institution of Mining and Metallurgy. 1975. pp. 1-11.

Instrumentation for uranium plants

1. Reports

341 An experimental on-slream colorimetric uranium monitor and >olvent-addition controller for the Purlex process 1968 1530 AUREOL — an X-ray-absorption analyser for the determination of the uranium on loaded resin in ion-exchange plants 1973

2. Papers

NEEDES. C.R.S.. NICOL, M.J.. FINKELSTEIN. N.P. and ORMROD. G.T.W. The industrial application of a uranium dioxide lectrode./ S.Afr. Inst. Min. Metali. vol. 76. no. 4. Nov. 1975. pp. 238-246.

SOMMER. G. Less hands in uranium extraction. Nucl. Active. Jul. 1973. pp. 16-19.

SOMMER. G.. ORMROD. G.T.W , and CHAIX. R.P. Automation of uranium processing plants. Electron Instrumn. vol. 3. no. 10. Jan. 1973. pp. 9. II. 13. 15. 17. 19. 21.

SOMMER. G.. ORMROD. G.T.W., and CHAIX. R.P. Recent developments in the instrumentation and automation of uranium-processing plants./ S.Afr. Inst. Min. Metali, vol. 73, no. 12. Jul. 1973. pp. 413-;20.

Methods for the- determination of baddeleyite, zirconium compounds, and nuclear-grade zirconium metals

I. Reports

39 The determination of small amounts of silica in zirconium ores and

concentrates 1966

49 The spectrophotometric determination of silica in zirconium oxide 1966

131 The spectrographic determination of tilanium oxide, ferric oxide, and silica, in

baddeleyite 1967

207 The analysis of baddeleyitc by X-ray-fluorescence spectroscopy 1967

272 The determination of iron, titanium, and zirconium, in baddeleyite by X-ray-fluorescence spectroscopy 1968 363 The determination of thorium in solid samples of baddeleyite and carbonatitc ores and in the solutions resulting from leaching these ores 1968 MM PI PI IC ATIONS

451 The determination of thorium in baddeleyite and carbonatite ores and in the solutions resulting from leaching of these ores 1968

1691 The determination of zirconium and aluminium by 14 MeV neutron-activation analysis 1975

1723 The determination of zirconium and aluminium in zirconium-aluminium alloys 1975

I HON Spectrophotometrie determination (with pyrocatechol violet as chromogenic agent) of aluminium in zirconium metals and in the residues from anode sludges 1976

1861 The determination of some impurities in zirconium metal by instrumental neutron-activation analysis 1976

Methods for the determination of trace impurifios in uranium compounds

. Reports

64 The determination of the hafnium/zirconium ratio in ammonium diuranate produced by the Bufflex process 1966 99 Determination of molybdenum in uranium compounds 1966 129 The polarographic determination of total hexavalent uranium as uranyl

153 fluoride in uranous fluoride 1967 1*7 Th-.' spectrographs determination of zirconium in uranium oxide 1967 174 The determination of thiocyanate in uranium solutions 1967 256 Determination of chloriJe in uranium solutions 1967

354 The determination of carbon in uranium tetrafluoride 1967 417 The determination of trace amounts of arsenic in uranium tetrafluoride 1968

433 Determination of mol bdenum in uranium compounds 1968 The speetrophotometric determination of microgram quantities of vanadium in 434 UO.. UO, and UO, 1968 The determination of titanium in uranium compounds 1968 440 Separation of hafnium and zirconium oxides from uranium preliminary to the spectrographs determination of hafnium 1968

450 The spectrographs determination of alkali metals and alkaline earths in uranium oxide 1968

485 Gravimetric determination, using nitron, of nitrates in uranium compounds 1969

951 (olonmetric determination of minor quantities of nitrate in uranium

compounds 1970

1043 The determination of ruthenium in uranyl fluoride 1970

1044 The determination of ruthenium in uranyl fluoride 1970

1089 The rapid volumetric determination of calcium in pregnant solutions in uranium plants 1970

111 N1M PUBLICATIONS

1408 The determination of molybdenum in the solids and solutions resulting from the processing of Witwatersrand uranium ores 1972

1722 The determinu Lion of small amounts of fluoride in uranium compounds by use of an ion-selective electrode 1975

2. Paper

RUSSELL. B.C. WILSON, A.. LUBBE. M.V., JONES. E., TAYLOR. J.D., and STEELE. T.W. The determination of selenium and tellurium in silver chloride and uranium oxide. Ttdanta. vol. 14, no. 8. Aug. 1967. pp. 957-966.

Methods tor the determination of uranium and thorium

1. Reports

156 Preliminary observations on the automation of the TBP method for

determining uranium 1967

163 The fluorimetric determination of uranium 1967

257 The determination of uranium by the TBP method 1967

455 Determination of >iranium by the TBP method after extraction with ethyl acetate 1968 460 A rapid method for the determination of minor amounts of thorium in aqueous solutions of uranyl nitrate or chloride 1969

470 Rapid estimation of uranium in raffinate solutions containing thorium by the pyridylazo-naphthol method 1969

503 Rapid estimation, by the ammonium thiocyanate method, of uranium in raffinate solutions containing thorium, lead, and copper 1969

529 The determination of uranium in the organic solvent from the Purlex process 1969

W l The determination of thorium in solid samples and in solutions resulting from the leaching of ores 1970 1075 The preparation of PADAP - 2-(2-pyridylazo)-5-diethylaminophenol (zinc complex) 1970

1076 The direct determination of acid-soluble uranium in silicate ores and in the soiutions resulting from leaching these ores 1970

1077 The determination of acid-soluble, acid-insoluble, and total uranium in silicate ores 1970

1113 The determination of uranium in ores and solutions by X-ray fluorescence 1970

1145 The use of 2-(2-pyridylazo)-5-diethy|aminophenol as a spectrophotometric reagent for the determination of uranium 1971 1427 The pressed fused-disc — a technique for the preparation of ore samples to be analysed for uranium by X-ray fluorescence 1972

1625 The determination of uranium and thorium by the use of delayed neutrons i974

1749 Epithermal-neutron-activation analysis for uranium in Barberton and Bushveld granites 1975 r MM PI Bl.If ATIONS 1840 The spectrophotometric determination of total uranium in silicate ores and leach liquors by use of bromo-PADAP 1976

1X41 The determination of acid-soluble uranium in silicate ores and solutions 1976

2. Paper,

COOK. E.B.T.. and GEREGHTY. A. The spectrophotometric determination of uranium by use of 2-(2-pyridylazo)-5-diethylaminophenoi (PADAP). Bull. S.Afr. Inst. Assayers Analysts, no. 12. Jul. 1971. pp. 1-10.

RUSSELL. B.G.. and DOMEL. G. The analysis of uranium by X-ray-fluorescence techniques. Bull. S.Afr. Inst. Assayers Analysis, no. 6. Jan. 1970.

Mineralogical studies of uranium minerals

I. Reports

237 The mineralogy of uranium in Western Areas ores 1967

414 The geochemistry of some uranium minerals in the Dominion Reef and Witwatersrand Systems 1968

415 Uranium compounds in the Dominion Reefs, and their association with phosphorus compounds 1968

2. Papers

BERNING. J.. COOKE. R.. HIEMSTRA. S.A.. and HOFFMAN. U. The Róssing uranium deposit. South West Africa. Earn. Geol., vol. 71. 1976. pp. 351-368.

HIEM.STR A. S. A. The mineralogy and petrology of the uraniferous conglomerate of the Dominion Reefs Mine. Klerksdorp area. Trans. Geol. Soc. S.Afr., vol. 71, no. I. 1968. pp. 1-65.

HIEMSTR A. S.A. The geochemistry of the uraniferous conglomerate of the Dominion Reefs Mine. Klerksdorp area. Trans. Geol. Soc. S.Afr., vol. 71, no. I. 1969. pp. 67-100.

Processes for the recovery of uranium

I. Reports

452 The Purlex process — a description of the pilot plant leading to the use of the 1969 process in South Africa 1454 1972 A dynamic model for the extraction bank of Purlex plants 1477 1972 The control of Purlex plants 2. Papers

FAURK. A., and TUNLEY.T.H. Uranium recovery by i'quid-liquidexlraction in South Africa. THE RECOVERY OF URANIUM. International Atomic Energy Agency. Vienna, the Agencv. 1971. pp. 241-251

HAINES. A.K.. CRAIG. W.M.. FAURE. A.. HENDRIKSZ. A.R.. WILLS. W.J.. and NICOL. D.I. The use of weak-base resins in the recovery of uranium from unclarificd leach liquors. ELEVENTH INTERNATIONAL MINERAL PROCESSING CONGRESS 1975. Imtuuto di Arte Mineraria. Rome. A/icnde Tipografiche Bardi. 1976. Paper 32. pp. 1-2K. L 11 <