Results 121 to 130 of about 675 (179)
Cattle's Social Rank Throughout the Transition from Rangeland to Fattening Affects Beef Quality. [PDF]
Animals (Basel)Soberanes-Oblea P +6 more
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Lixiviation kinetics of cobalt from cemented carbides
International Journal of Refractory Metals and Hard Materials, 2018Abstract This report aims to disclose interactions between semi-direct recycling concepts, corrosion analysis of hard metals and possible leaching mechanisms. Accordingly, an examination reveals chemical kinetic dependencies via leaching a cutting insert in formic acid inclusive an oxidant. Currently, contradictions and issues in literature slow down
Gregor Kucher +2 more
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Chalcopyrite leaching in novel lixiviants
Hydrometallurgy, 2022Abstract Chalcopyrite (CuFeS2) makes up a large and increasing fraction of the world's future copper resources, but is highly refractory to leaching with common lixiviants. Novel lixiviants, less common reagents recently proposed for chalcopyrite leaching and reviewed here, show varying chemical effectiveness and economic potential.
Isabel F. Barton, J. Brent Hiskey
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Thiosulphate: An alternative lixiviant for gold ore
Mineral Processing on the Verge of the 21st Century, 2017Dissolution of precious metals from Ovacik gold ore py ammoniacal thiosulphate has been investigated. The effect of parameters such as solid / water ratio, S2O32-, Cu2+, NH3, SO32- concentrations and leaching time have been experimentally determined. In optimum leach conditions 82 % Au and 83 % Ag recoveries have been obtained.
Mordogan, H +3 more
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A lixiviation-study of copper arsenides in acid medium
Journal of Inorganic and Nuclear Chemistry, 1974Abstract The lixiviation behaviour of the different Cu-arsenides, submitted to the action of several oxidants (O2, H2O2, Fe3+, Ce4+) in acid medium and at different temperatures, is examined. A potential-pH diagram is constituted, from which it can be anticipated that the Cu3−xAs and Cu5−xAs2 phases thermodynamically must give rise to the formation ...
P. Priest, L.J. Pauwels, J. Naud
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Lixiviation Effects In Glass Polishing
SPIE Proceedings, 1989From our glass polishing process of precision optics we know that its physical-chemical nature frequently leads to a complex interaction of several parameters determining the process and the resulting quality. Surface analysis using SIMS and WDX prove that surface and sharp edge polishing of integrated optics chips has to be watched critically in order
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Metal Lixiviation of Steel Foundry Dust
1991Solid waste, steel foundry dust, comes from gas filtration units in the steel industry. Taking into account two main manufacturing processes leading to common steel and special steel, two different byproducts have been investigated: dust P1 from special steel manufacture and dust P2 from common steel manufacture.
A. Andrés +3 more
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Aqueous lixiviants: Principle, types, and applications
JOM, 2007Aqueous lixiviant is a leach liquour capable of dissolving all or part of ore or concentrate. It plays a critical role in the hydrometallurgical process. Although cyanide leaching of gold and silver has demonstrated success in the industry for 100 years, searching for innovative lixiviants to leach gold, copper, and other heavy metals effectively ...
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Electrochemical cleaning of soil contaminated with a dichromate lixiviant
International Journal of Mineral Processing, 2003Abstract Experiments are conducted on kaolin contaminated with a lixiviant obtained from a sodium dichromate plant residue to demonstrate the efficacy of electrochemical cleaning. After 120 h, only 36% chromium is removed from the soil. Chromium removal is high in the first 20 h, after which it falls drastically.
M Manna, K Sanjay, R Shekhar
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Urban Mining of Precious Metals with Cyanide as Lixiviant
2021This chapter is devoted to investigations and developments in precious metal leaching from urban mines using cyanide as lixiviant. Factors affecting platinum, palladium, gold, and rhodium leaching are the characteristics of the particular reagent and process chemistry. Extraction mechanisms are discussed in depth. The cyanide leaching order of platinum,
Rajiv Ranjan Srivastava +3 more
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