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Bioleaching of Manganese from Ores Using Heterotrophic Microorganisms
By E. G. Noble
The potential for using heterotrophic microorganisms to solubilize manganese from low-grade domestic ores is being assessed at the Reno Research. center, U.S. Bureau of Mines. More than 90 pct of the
Jan 1, 1991
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Carbothermic Reduction and Leaching of Manganese Ores from the West-Central Arkansas District
By W. K. Connor, O&apos
The Bureau of Mines has conducted beneficiation, carbothermic reduction, and leaching tests of Mn oxide ores as part of its evaluation of the Mn and Co resources of the West- Central Arkansas District
Jan 1, 1992
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Melt Atomisation -The Bridge From Pyro-To Hydro-Metallurgy (4b571402-9326-42b0-b2f3-e03da3d3858a)
By John J. Dunkley
Recent years have seen the increased use of hydrometallurgy in the smelting and refining of metals. However this is often used as a final refining step, following an initial pyrometallurgical smelting
Jan 1, 2003
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High-Temperature Cyanide Leaching of Automobile Catalysts In A Process Development Unit
By R. J. Kuczynski
The U.S. Bureau of Mines operated a 2,000-9 (4.4-lb) batch process development unit for recovering platinum-group metals (PGM) from automobile catalysts. Virgin monolith, used pellet and used monolith
Jan 1, 1993
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Application of Oxygen Enrichment for the Pyrohydrolysis of Metal Chlorides
By B. Wasmund, K. Adham, K. O'Keefe, C. Lee
"Metal chlorides (e.g. iron and nickel) can be pyrohydrolysed at elevated temperatures to yield an HCl rich off-gas and a metal oxide product. Typically, the high energy requirement for pyrohydrolysis
Jan 1, 2011
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Secondary Lead Smelting at East Penn Manufacturing Co., Inc.
By Richard A. Leiby
The recycling of lead-acid batteries in the United States has become a challenge as to how to balance ever increasing environmental regulation and cost with efficient operations. East Penn's cap
Jan 1, 1993
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Physical Model Studies of Some Metallurgical Processes
By John J. J. Chen, Barry J. Welch
"As in many industrial processes, the detailed mechanisms involved must first be understood before being able to redesign, or to carry out improvements or optimisation of the process and equipment per
Jan 1, 1994
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Removal of the Refractoriness of a Gold Bearing Pyrite-Arsenopyrite Ore by Ferric Sulphate at Low Concentration
By Nieves Iglesias
The removal of the refractoriness of a gold bearing pyrite- arsenopyrite ore is studied. Flotation concentrates were prepared and leached with a dilute acidic ferric sulfate solution. The elemental su
Jan 1, 1993
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Direct Sulfation Of Nickel Laterite Ores Using Sulfur Dioxide Rich Gases
By D. Papazoglou
This work was undertaken to investigate the thermodynamic and kinetic feasibility of using hot sulfur dioxide bearing gases from smelting processes to selectively sulfate the nickel in nickel laterite
Jan 1, 2003
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A New Numerical Model for Predicting Carbon Concentration During RH Degassing Treatment
By Young-Geun Park
A new decarburization model for the RH system was constructed for calculating the decarburization reaction using a three-dimensional fluid dynamics program. The entire fluid flow in the RH process was
Jan 1, 2001
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Oxidation and Ignition Characteristics of Nickel Concentrates
By J. J. Talja
An investigation of oxidation of various nickel concentrates was carried out using differential scanning calorimetry (DSC). The aim of this study was to determine the ignition temperature and investig
Jan 1, 1994
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Fission Product Removal From Molten Salt Using Zeolite
By C. Pereira
Spent nuclear fuel (SNF) can be treated in a molten salt electro refiner for conversion into metal and mineral waste fonns for geologic disposal. The fuel is dissolved in molten chloride salt. Non-tra
Jan 1, 1996
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Treatment of Lead Wastes From Lead-Acid Battery Recycling Plants
By Agnes Y. Lee
he U.S. Bureau of Mines developed a method to treat lead-contaminated soil and ebonite battery casing wastes to produce a nonhazardous material. The cleanup procedure involves wet screening to separat
Jan 1, 1993
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Formation of Artificially-Layered Superconducting Materials by Pulsed-Laser Deposition
By J. D. Budai, D. H. Lowndes, D. P. Norton, D. K. Christen, B. C. Chakoumakos, J. R. Thompson, B. C. Sales
"Artificially-layered structures, consisting of (Sr,Ba,Ca)CuO2 layers in the tetragonal, ""infinite layer"" crystal structure, have been grown by pulsed-laser deposition. Superlattice chemical modulat
Jan 1, 1994
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Deoxidation Equilibrium of Silicon in Liquid Nickel Alloys
By Fujio Ishii
The deoxidation of liquid nickel and nickel binary alloys with silicon has been determined at temperatures between 1500°C and 1650°C using quartz crucibles in order to investigate the deoxidation of n
Jan 1, 1993
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Recent Modifications And Operation Of the Acid Plant At Naoshima
By T. Ueno
Naoshima Smelter & Refinery of Mitsubishi Materials Crop. commissioned a new Mitsubishi continuous copper smelter in May 1991. Process offgas volume of the conventional reverberatory furnace line, one
Jan 1, 1992
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Metal, Matte and Slag Solution Thermodynamics
By T. R. A. Davey
A simple model for metal solution behaviour may be derived, on the basis of dilute solution solubilities (where? log concentration of solute varies linearly with reciprocal temperature) and not-so-dil
Jan 1, 1985
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Effervescence During Desulfurization Of Copper Melts
By R. Harris
Blister copper melts of 800 g to 1000 g containing less than 1 wt % S and up to 3 wt % Ni were desulfurized at 1523 K in air or by a pure oxygen jet blown at 75,500 and 1000 cm3/min, from 1 cm above t
Jan 1, 1999
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Separation of Titanium Component from Treated Slag by Gravity Separation /Flotation
By Bingchen Chen, Zhitong Sui, Junwei Ma
"In the blast furnace slag, titanium disseminated in various mineral phases Titanium could be concentrated mainly in perovskite, which could be selectively precipitated and grown by optimizing the ope
Jan 1, 2000
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The Estimation of Waste Packaging Containers Generated By Households in Taiwan
By Chen-Ming Kuo, Esher Hsu
"The importers and manufacturers who import or produce products with packaging containers are charged a recycling fee in Taiwan. The amount of waste packaging containers used for calculating the recyc
Jan 1, 2014