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Extracting Platinum-Group Metals from Stillwater Complex Flotation Concentrate by a Two-Stage Bacterial Oxidation/Chemical Treatment Process
By D. L. Yopps
Platinum-group metal (PGM) flotation .. concentrate from the Stillwater Complex, MT, was subjected to biooxidation using Thiobacillus ferrooxidans in an effort to break down the sulfide minerals and l
Jan 1, 1991
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Solvent Extraction Equilibria Of Tervalent Lanthanides: A Systematic Investigation Of Selectivity Of Chelate Extraction
By Henry Freiser
For the last several years, a systematic investigation of the equilibrium extraction behavior of selective tervalent lanthanides with representative chelating extractions of a variety of chelating age
Jan 1, 1989
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Gold Leaching by Sodium Chloride and Calcium Hypochlorite Solutions
By Carvalho A. Felipe de
The search for environmentally friendly and cost-effective methods for gold extraction has been undertaken in order to provide alternatives to the use of cyanide leaching in the gold industry. Among s
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A Review on Application of Crown Ethers in Separation of Rare Earths and Precious Metals
By V. I. Lakshmanan
Crown ethers are gaining importance in separation technology specifically for rare earth elements (REE, La to Lu plus Y) and precious metals (Au, Ag, Pt, Pd, Rh and Ir) due to their specific binding a
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Recycling Of Valuable Metals from Poly Cracker Ash of Printed Circuit Boards (PCBS) By Physical Beneficiation and Hydrometallurgical Treatment
By Anjan Kumari, B. K. Soni, Manis Kumar Jha, A. Vidyadhar, Vinod Kumar
"In the present paper, recovery of valuable metals from the poly-cracked ash obtained by pyrolysis of discarded PCBs has been studied following physical beneficiation and a hydrometallurgical process
Jan 1, 2014
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Environmental Stability of Arsenic Bearing Hydrous Iron Oxide Compounds
By M. T. Ernett
Significant amounts of arsenic are often present in effluents arising from the mining of sulfide ores for the extraction of metals such as copper, gold, lead and zinc. The arsenic is usually removed f
Jan 1, 1994
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The Evolution of the Greek Ferronickel Production Process
By Emmanuel N. Zevgolis
After the Krupp-Renn process was shown to be unsuitable for treatment of the Greek nickeliferous laterites, the LM process was developed. It involved roasting reduction up to metallic iron in a Rotary
Jan 1, 2004
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Effects Of Accelerated Thermal Aging On Polypropylene Modified By Irradiation Process
By Duclerc Fernandes Parra, Luis Filipe Carvalho Pedroso de Lima, Washington Luiz Oliani, Danilo Marin Fermino, Ademar Benevolo Lugao
The modified polypropylene was obtained from isotactic polypropylene (iPP) in spheres by irradiation with gamma rays in the presence of acetylene. A new morphology with distinct rheology is obtained b
Jan 1, 2015
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Scandium Recovery From A Tantalum Waste Residue: A Status Report
By D. D. Harbuck
The U.S. Bureau of Mines recently identified a significant new source of scandium in an Oklahoma tantalum waste residue (approximately 0.24 pct Sc). Because scandium is a strategic and critical metal
Jan 1, 1992
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Application of Mathematical Heat Flow and Stress Models of Steel Ingot Casting to Investigate Panel Crack Formation
By J. K. Brimacombe, I. V. Samarasekera, B. G. Thomas
"Mathematical models have been developed for the processing of static cast steel ingots and are app1ied to investigate the mechanisms for the formation of panel cracks. Panel cracking is an intermitte
Jan 1, 1986
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Inclusion Characteristics in Stainless Steel Ingots
By Greg Dowling, Jun Ge, George Shannon, Shufeng Yang, Yongfeng Chen, Lifeng Zhang
"Inclusions in 316L stainless steel ingots poured using two different upgate designs – a traditional upgate and a swirl upgate - were investigated using SEM and ASPEX automated inclusion analysis. The
Jan 1, 2012
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Improved Short Coil Correction Factor for Induction Heating of Billets
By Ragnhild E. Aune, Mark William Kennedy, Shahid Akhtar, Jon Arne Bakken
"To determine the heating rate of billets using ‘short coils’, an appropriate correction factor must be applied to the theoretical relationship. In 1945, Vaughan and Williamson published a semi-empir
Jan 1, 2012
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Physical Modelling of the Viscosities of Two-Phase Mixtures
By Du Sichen, S. Seetharaman, Wei Liu
"The viscosities of two-phase mixtures are of great importance in the modelling of the fluid flow in metallurgical processes. For example, in steel making and refining, the intimate mixing of metal dr
Jan 1, 2000
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Preparation and Properties of CuIns2 Thin Films by Electrodeposition and Sulfurization
By Mim Li, Huimin Lu, Lisha Yang
"CuInS2 thin films solar cells have drawn much attention for their low-cost, stability and high conversion efficiency. The electrodeposition of Cu-In precursor films, as the first step in making CuinS
Jan 1, 2011
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Mineralogical and Image Analysis Study of Artificially Weathered Tailings from the Midwest Uranium Ore in Saskatchewan
By William Petruk
A mineralogical and image analysis study was conducted on samples of U tailings from pilot-plant runs on Midwest ore in Northern Saskatchewan. The tailings had been subjected to simulated weathering f
Jan 1, 1989
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The Outokumpu Method for Lead Recovery in Electric Furnace
By Jukka S. Sulanto
Outokumpu has applied its well -known copper Fl ash Smelling Process also for smelting su1phide lead . concentrates. The lead in the Flash Smelting Furnace slag is recovered by reducing the oxygen pot
Jan 1, 1990
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Study on Improving the Strength of Copper Concentrate Pellets by Adding Binders
By Guohua Bai, Lin Zhang, Shan He, Xuling Chen, Min Gan, Xiaohui Fan, Yanbin Tang
"For reducing the dust content in flue gas during copper smelting in the Ausmelt, technologies and mechanism of strengthening the pelletizing of copper concentrate were studied. The results show that
Jan 1, 2013
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Recent Improvements in Waelz Operation for Zinc Leach Residue
By M. Sakamoto, S. Karaswa, Y. Yoneoka, Y. Ohmizo
"The Annaka Refinery has been processing leach residue by Waelz process for 17 years. Recently, the quantity of the leach residue has increased due to a decline in the quality ~f zinc concentrate. Mea
Jan 1, 2000
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A Study Of The Spouted-Bed Electrowinning Of Copper
By V. Jiricny
The novel spouted-bed electrode (SBE) is a cathode system where copper is deposited at a high current density in a moving bed of copper particles. Preliminary results on the deposition of copper from
Jan 1, 1999
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Kinetics Of Vanadium Extraction From Hot Metal By Basic Slag
By Zhen Zhang, Jiang Diao, Xuan Liu, Tao Zhang, Bing Xie, Hong-Yi Li
Extracting vanadium from vanadium containing hot metal by LD process has been proven an effective solution for the utilization of vanadium-titanium magnetite ore, but the systematic analyses of vanadi
Jan 1, 2015