The Albemarle Iron Works (1770-72)
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Effects of Carburization Time and Temperature on the Mechanical Properties of Carburized Mild Steel, Using Activated Carbon As Carburizer
Materials Research, Vol. 12, No. 4, 483-487, 2009 © 2009 Effects of Carburization Time and Temperature on the Mechanical Properties of Carburized Mild Steel, Using Activated Carbon as Carburizer Fatai Olufemi Aramidea,*, Simeon Ademola Ibitoyeb, Isiaka Oluwole Oladelea, Joseph Olatunde Borodea aMetallurgical and Materials Engineering Department, Federal University of Technology, Akure, Ondo State, Nigeria bMaterials Science and Engineering Department, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria Received: July 31, 2009; Revised: September 25, 2009 Due to the complexity of controlling parameters in carburization, there has been relatively little work on process variables during the surface hardening process. This work focuses on the effects of the carburizing temperature and time on the mechanical properties of mild steel carburized with activated carbon, at 850, 900 and 950 °C, soaked at the carburizing temperature for 15 and 30 minutes, quenched in oil, tempered at 550 °C and held for 60 minutes. Prior carburization process, standard test samples were prepared from the as received specimen for tensile and impact tests. After carburization process, the test samples were subjected to the standard test and from the data obtained, ultimate tensile strength, engineering strain, impact strength, Youngs’ moduli were calculated. The case and core hardness of the carburized tempered samples were measured. It was observed that the mechanical properties of mild steels were found to be strongly influenced by the process of carburization, carburizing temperature and soaking time at carburizing temperature. It was concluded that the optimum combination of mechanical properties is achieved at the carburizing temperature of 900 °C followed by oil quenching and tempering at 550 °C. -
ITP Metal Casting: Advanced Melting Technologies
Advanced Melting Technologies: Energy Saving Concepts and Opportunities for the Metal Casting Industry November 2005 BCS, Incorporated 5550 Sterrett Place, Suite 306 Columbia, MD 21044 www.bcs-hq.com Advanced Melting Technologies: Energy Saving Concepts and Opportunities for the Metal Casting Industry Prepared for ITP Metal Casting by BCS, Incorporated November 2005 Acknowledgments This study was a collaborative effort by a team of researchers from University of Missouri–Rolla, Case Western Reserve University, and Carnegie Mellon University with BCS, Incorporated as the project coordinator and lead. The research findings for the nonferrous casting industry were contributed by Dr. Jack Wallace and Dr. David Schwam, while the ferrous melting technologies were addressed by Dr. Kent Peaslee and Dr. Richard Fruehan. BCS, Incorporated researched independently to provide an overview of the melting process and the U.S. metal casting industry. The final report was prepared by Robert D. Naranjo, Ji-Yea Kwon, Rajita Majumdar, and William T. Choate of BCS, Incorporated. We also gratefully acknowledge the support of the U.S. Department of Energy and Cast Metal Coalition (CMC) in conducting this study. Disclaimer This report was prepared as an account of work sponsored by an Agency of the United States Government. Neither the United States Government nor any Agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any Agency thereof. -
5. Sirhowy Ironworks
Great Archaeological Sites in Blaenau Gwent 5. SIRHOWY IRONWORKS There were a number of ironworks in the area now covered by Blaenau Gwent County Borough, which provided all the raw materials they needed – iron ore, limestone and fuel, charcoal at first but later coal to make coke. The Sirhowy ironworks (SO14301010) are the only one where there is still something to see. The works were opened in 1778 with one blast furnace. Although it was originally blown by water power, in 1799 the owners invested in a Boulton and Watt steam engine. This gave them enough power to blow a second furnace, which started production in 1802. In the early years of the 19th century, the pig iron produced at Sirhowy was sent to the Tredegar works a little further down the valley where it was refined, until 1818 when the Sirhowy works were sold and started to send its pig iron to Ebbw Vale. A third furnace was added in 1826 and a fourth in 1839. But by the 1870s iron smelting at Sirhowy was no longer profitable, and the works finally closed in 1882. Like all ironworks in South Wales, the furnaces were built against a steep bank which enabled the ironworkers to load the charge of iron ore, limestone and coke or charcoal fuel more easily at the top of the furnace. All that is now left now are the remains of a bank of blast furnaces with the arches that would originally have linked them to the casting houses in front, and the building that originally housed the waterwheel. -
AP-42, CH 12.9: Secondary Copper Smelting
12.9SecondaryCopperSmelting 12.9.1General1,2 Asof1992,morethan40percentoftheU.S.supplyofcopperisderivedfromsecondary sources,includingsuchitemsasmachineshoppunchings,turnings,andborings;manufacturingfacility defectiveorsurplusgoods;automobileradiators,pipes,wires,bushings,andbearings;and metallurgicalprocessskimmingsanddross.Thissecondarycoppercanberefinedintorelativelypure metalliccopper,alloyedwithzincortintoformbrassorbronze,incorporatedintochemicalproducts, orusedinanumberofsmallerapplications.Sixsecondarycoppersmeltersareinoperationinthe U.S.:3inIllinoisand1eachinGeorgia,Pennsylvania,andSouthCarolina.Alargenumberofmills andfoundriesreclaimrelativelypurecopperscrapforalloyingpurposes. 12.9.2ProcessDescription2,3 Secondarycopperrecoveryisdividedinto4separateoperations:scrappretreatment,smelting, alloying,andcasting.Pretreatmentincludesthecleaningandconsolidationofscrapinpreparationfor smelting.Smeltingconsistsofheatingandtreatingthescrapforseparationandpurificationofspecific metals.Alloyinginvolvestheadditionof1ormoreothermetalstocoppertoobtaindesirable qualitiescharacteristicofthecombinationofmetals.Themajorsecondarycoppersmeltingoperations areshowninFigure12.9-1;brassandbronzealloyingoperationsareshowninFigure12.9-2. 12.9.2.1Pretreatment- Scrappretreatmentmaybeachievedthroughmanual,mechanical,pyrometallurgical,or hydrometallurgicalmethods.Manualandmechanicalmethodsincludesorting,stripping,shredding, andmagneticseparation.Thescrapmaythenbecompressedintobricquettesinahydraulicpress. Pyrometallurgicalpretreatmentmayincludesweating(theseparationofdifferentmetalsbyslowly -
National Register of Historic Places Multiple Property
NFS Form 10-900-b 0MB No. 1024-0018 (Jan. 1987) United States Department of the Interior National Park Service National Register of Historic Places Multipler Propertyr ' Documentation Form NATIONAL This form is for use in documenting multiple property groups relating to one or several historic contexts. See instructions in Guidelines for Completing National Register Forms (National Register Bulletin 16). Complete each item by marking "x" in the appropriate box or by entering the requested information. For additional space use continuation sheets (Form 10-900-a). Type all entries. A. Name of Multiple Property Listing ____Iron and Steel Resources of Pennsylvania, 1716-1945_______________ B. Associated Historic Contexts_____________________________ ~ ___Pennsylvania Iron and Steel Industry. 1716-1945_________________ C. Geographical Data Commonwealth of Pennsylvania continuation sheet D. Certification As the designated authority under the National Historic Preservation Act of 1966, as amended, J hereby certify that this documentation form meets the National Register documentation standards and sets forth requirements for the listing of related properties consistent with the National Register criteria. This submission meets the procedural and professional requiremerytS\set forth iri36JCFR PafrfsBOfcyid the Secretary of the Interior's Standards for Planning and Evaluation. Signature of certifying official Date / Brent D. Glass Pennsylvania Historical & Museum Commission State or Federal agency and bureau I, hereby, certify that this multiple -
The White Book of STEEL
The white book of STEEL The white book of steel worldsteel represents approximately 170 steel producers (including 17 of the world’s 20 largest steel companies), national and regional steel industry associations and steel research institutes. worldsteel members represent around 85% of world steel production. worldsteel acts as the focal point for the steel industry, providing global leadership on all major strategic issues affecting the industry, particularly focusing on economic, environmental and social sustainability. worldsteel has taken all possible steps to check and confirm the facts contained in this book – however, some elements will inevitably be open to interpretation. worldsteel does not accept any liability for the accuracy of data, information, opinions or for any printing errors. The white book of steel © World Steel Association 2012 ISBN 978-2-930069-67-8 Design by double-id.com Copywriting by Pyramidion.be This publication is printed on MultiDesign paper. MultiDesign is certified by the Forestry Stewardship Council as environmentally-responsible paper. contEntS Steel before the 18th century 6 Amazing steel 18th to 19th centuries 12 Revolution! 20th century global expansion, 1900-1970s 20 Steel age End of 20th century, start of 21st 32 Going for growth: Innovation of scale Steel industry today & future developments 44 Sustainable steel Glossary 48 Website 50 Please refer to the glossary section on page 48 to find the definition of the words highlighted in blue throughout the book. Detail of India from Ptolemy’s world map. Iron was first found in meteorites (‘gift of the gods’) then thousands of years later was developed into steel, the discovery of which helped shape the ancient (and modern) world 6 Steel bEforE thE 18th cEntury Amazing steel Ever since our ancestors started to mine and smelt iron, they began producing steel. -
Principles of Extractive Metallurgy Lectures Note
PRINCIPLES OF EXTRACTIVE METALLURGY B.TECH, 3RD SEMESTER LECTURES NOTE BY SAGAR NAYAK DR. KALI CHARAN SABAT DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING PARALA MAHARAJA ENGINEERING COLLEGE, BERHAMPUR DISCLAIMER This document does not claim any originality and cannot be used as a substitute for prescribed textbooks. The information presented here is merely a collection by the author for their respective teaching assignments as an additional tool for the teaching-learning process. Various sources as mentioned at the reference of the document as well as freely available material from internet were consulted for preparing this document. The ownership of the information lies with the respective author or institutions. Further, this document is not intended to be used for commercial purpose and the faculty is not accountable for any issues, legal or otherwise, arising out of use of this document. The committee faculty members make no representations or warranties with respect to the accuracy or completeness of the contents of this document and specifically disclaim any implied warranties of merchantability or fitness for a particular purpose. BPUT SYLLABUS PRINCIPLES OF EXTRACTIVE METALLURGY (3-1-0) MODULE I (14 HOURS) Unit processes in Pyro metallurgy: Calcination and roasting, sintering, smelting, converting, reduction, smelting-reduction, Metallothermic and hydrogen reduction; distillation and other physical and chemical refining methods: Fire refining, Zone refining, Liquation and Cupellation. Small problems related to pyro metallurgy. MODULE II (14 HOURS) Unit processes in Hydrometallurgy: Leaching practice: In situ leaching, Dump and heap leaching, Percolation leaching, Agitation leaching, Purification of leach liquor, Kinetics of Leaching; Bio- leaching: Recovery of metals from Leach liquor by Solvent Extraction, Ion exchange , Precipitation and Cementation process. -
Gas-Phase Boudouard Disproportionation Reaction Between Highly Vibrationally Excited CO Molecules
Chemical Physics 330 (2006) 506–514 www.elsevier.com/locate/chemphys Gas-phase Boudouard disproportionation reaction between highly vibrationally excited CO molecules Katherine A. Essenhigh, Yurii G. Utkin, Chad Bernard, Igor V. Adamovich *, J. William Rich Nonequilibrium Thermodynamics Laboratories, Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43202, USA Received 3 September 2006; accepted 21 September 2006 Available online 30 September 2006 Abstract The gas-phase Boudouard disproportionation reaction between two highly vibrationally excited CO molecules in the ground elec- tronic state has been studied in optically pumped CO. The gas temperature and the CO vibrational level populations in the reaction region, as well as the CO2 concentration in the reaction products have been measured using FTIR emission and absorption spectroscopy. The results demonstrate that CO2 formation in the optically pumped reactor is controlled by the high CO vibrational level populations, rather than by CO partial pressure or by flow temperature. The disproportionation reaction rate constant has been determined from the measured CO2 and CO concentrations using the perfectly stirred reactor (PSR) approximation. The reaction activation energy, 11.6 ± 0.3 eV (close to the CO dissociation energy of 11.09 eV), was evaluated using the statistical transition state theory, by comparing the dependence of the measured CO2 concentration and of the calculated reaction rate constant on helium partial pressure. The dispro- À18 3 portionation reaction rate constant measured at the present conditions is kf =(9±4)· 10 cm /s. The reaction rate constants obtained from the experimental measurements and from the transition state theory are in good agreement. -
Hopewell Village
IRONMAKING IN EARLY AMERICA the Revolutionary armies, is representative of (such as Valley Forge) to be made into the tougher the hundreds of ironmaking communities that and less brittle wrought iron. This was used to Hopewell In the early days of colonial America, iron tools supplied the iron needs of the growing nation. make tools, hardware, and horseshoes. and household items were brought over from Europe by the settlers or imported at a high cost. Until surpassed by more modern methods, cold- HOPEWELL FURNACE Village The colonists, early recognizing the need to manu blast charcoal-burning furnaces, such as that NATIONAL HISTORIC SITE • PENNSYLVANIA facture their own iron, set up a number of iron at Hopewell, supplied all the iron. These furnaces In an age when most businesses were operated by works, notably at Falling Creek, Va., and Saugus, consumed about 1 acre of trees a day for fuel, one or two men in a shop, Hopewell employed at Mass. Operations gradually spread throughout so they had to be located in rural areas close to least 65 men, with some responsible for two or the colonies, and by the end of the 1700's, south a timber supply. more jobs. As the nearest town was many miles eastern Pennsylvania had become the industry's away, the ironmaster built a store to supply his center. Hopewell Village, founded by Mark Bird Since the pig iron produced by these furnaces workers, many of whom lived in company-owned in 1770 in time to supply cannon and shot for had a limited use, much of it was sent to forges homes. -
Experimental Design for Copper Cementation Process in Fixed Bed
Arabian Journal of Chemistry (2010) 3, 187–190 King Saud University Arabian Journal of Chemistry www.ksu.edu.sa www.sciencedirect.com ORIGINAL ARTICLE Experimental design for copper cementation process in fixed bed reactor using two-level factorial design I. Yahiaoui *, F. Aissani-Benissad Laboratoire de Ge´nie de l’Environnement (LGE), De´partement de Ge´nie des Proce´de´s, Faculte´ de la Technologie, Universite´ A.MIRA de Bejaia 06000, Algeria Received 20 July 2009; accepted 20 December 2009 Available online 18 April 2010 KEYWORDS Abstract This work deals with cementation of copper onto iron grid in a fixed bed reactor. The 2+ Copper; influence of several parameters is studied, namely: initial concentration of copper [Cu ]0, temper- Iron; ature and flow rate. Moreover, their influence on the copper cementation reaction is investigated Fixed bed reactor; statistically by the experimental design in view of industrial application. The estimation and the Factorial design comparison of the parameter’s effects are realized by using two-level factorial design. The analysis of these effects permits to state that the most influential factor is initial concentration of copper 2+ [Cu ]0 with an effect of (+2.4566), the second in the order is the temperature with an effect of (+0.18959), the third is the flow rate of the electrolytic solution with an effect of (À0.4226). The significance interactions found by the design of experiments are between initial concentrations of copper ions–flow rate (x1x3) with an effect (b13 = +0.6965). ª 2010 King Saud University. All rights reserved. 1. Introduction Ultimately, this wastewater is discharged in permitted concen- trations of suspended solids and dissolved salts. -
Metals in the Bible: Silver (Part 1)
The Testimony, August 2004 329 times of restitution of all things” (Acts 3:21, AV). the last verse of his song does look forward to In contrast, the song of Moses in chapter 32 pre- the time of blessing when the Gentiles will re- dicts future rebellion and consequent punish- joice with God’s people and atonement will have ment that would occur before the final glory been provided for both land and people (v. 43). would be attained by the nation. Nevertheless, (To be continued) New feature Metals in the Bible 3. Silver (Part 1) Peter Hemingray In 1996 and 1997 The Testimony published two two-part articles under the title, “Metals in the Bible”, in which we looked at iron and copper.1 We considered the ancient technology of iron, and how this knowledge helps illuminate the Biblical references to it. In particular, we saw how the introduction of iron during the period of the conquest affected the Israelites, who had to overcome superior technology through the power of God. For copper (or brass, as the AV terms it) the ancient metalworking methods were illuminated with illustrations from Timnah in Palestine, and we argued for the symbology of copper in the Bible being primarily that of strength, and only rarely that of the strength of sin. The intention was to complete these studies on metals of the Bible by considering silver, then gold. This we have now done in two further two-part articles to be published in this and the coming months, God willing. E WILL CONTINUE the theme of il- • examine the references to refining and cruci- lustrating the Biblical passages about bles in the light of our knowledge of ancient Wmetals with descriptions of the ancient metalworking practices metalworking techniques, as we consider silver, • look at the few references to lead in the Bible, the next metal up in Nebuchadnezzar’s image often associated with silver for reasons we after the iron and brass already considered. -
DROSS in DUCTILE IRON by Hans Roedter, Sorelmetal Technical Services
98 DROSS IN DUCTILE IRON by Hans Roedter, Sorelmetal Technical Services WHAT IS “DROSS ”? magnesium with other elements. Dross also Dross is a reaction product which is formed from occurs in the form of long stringers instead of Mg treatment and during subsequent reoxidation concentrated “slag like” areas. When it occurs in of Mg rejected from the molten metal before it this string like form it acts like cracks or flake solidifies. It is therefore just another word for a graphite in the structure and so fatigue strength specific type of slag (reaction product). and impact strength of the material are lowered considerably. The reaction binds magnesium with sulphur, oxygen and silicon and forms continuously. This “dross” is light weight and so it will generally be found in the upper surfaces and under cores, but it can be entrained throughout the metal as well, especially with colder pouring tempera - tures. It is very difficult to completely avoid the reaction of magnesium with these other elements, since we need magnesium to form nodules. We are always confronted with the problem of dross in the production of Ductile Iron. WHAT IS PROMOTING “DROSS ” AND WHAT CAN BE DONE TO KEEP THE “DROSS ” OUT OF THE CASTING ? Since “dross” is always connected with magnesium, it is necessary to keep the magnesium level as low as possible. Good inoculation practice with some late inoculation in conjunction with sufficient magnesium will When looking at “dross” in the microscope you produce nice round small nodules. See will almost always find flake graphite in Suggestion Sheet 76.