Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1995-04-28
1996-12-24
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75744, C22B 306, C22B 312
Patent
active
055870015
ABSTRACT:
A process is provided for pretreating iron-containing sulfidic ores of precious metals or other such sulfidic rocks with a source of manganate ions prior to lixiviation to form a layer of manganese oxide, thereby reducing the consumption of lixiviation reagents or reducing acid rock drainage.
REFERENCES:
patent: 4421724 (1983-12-01), Hunnel
patent: 5034055 (1991-07-01), Rowson
John Marsden, Iain House, The Chemistry of Gold Extraction, Ellis Horwood, pp. 191-193, 276-277, 1992.
F. W. McQuiston, Jr., R. S. Shoemaker, Gold and Silver Cyanidation Plant Practice Monograph, The American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., 1975 pp. 1-25, 67, 68, 71, 72, 75, 76 & 79.
International Land Reclamation and Mine Drainage Conference and Third Inernational Conference on the Abatement of Acidic Drainage, vol. 2 of 4, Bureau of Mines Special Publication SP 06B-94, Surface Chemical Methods of Forming Hardpan In Pyrrhotite Tailings and Prevention of the Acid Mine Drainage; Potential Microencapsulation of Pyrite By Artificial Inducement of FEPO4 Coatings; Laboratory Testong of Coatings for Prevention of Acid Drainage in Underground Coal Mines Apr. 1994.
Andrews Melvyn
E. I. Du Pont de Nemours and Company
Frank George A.
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