C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 11/00 (2006.01) C22B 3/00 (2006.01) C22B 3/08 (2006.01) C22B 3/22 (2006.01) C22B 7/04 (2006.01) C22B 11/02 (2006.01)
Patent
CA 2360608
A method of recovering precious metals from metal alloys produced aluminothermically from base metal smelter slag, includes treating the metal alloy with aqueous sulphuric acid solution having a pH of not greater than about 2 to cause dissolution of nickel and/or cobalt and iron and to cause formation of hydrogen. sulfide which reacts with copper in the metal alloy to form a copper sulfide precipitate containing at least one precious metal, and separating the copper sulphide precipitate containing at least one precious metal from the remaining solution containing cobalt sulphate and/or nickel sulphate and ferrous sulphate.
Berardi Roberto
Krofchak David
Fenicem Minerals Inc.
Gowling Lafleur Henderson Llp
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