Recovery of precious metals from metal sulphides

Details Recovery of precious metals from metal sulphides Recovery of precious metals from metal sulphides

1976-08-13

1978-01-24

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75101R, 75117, 75118R, 75109, 423 32, 423 36, C22B 1104, C22B 1510

Patent

active

040701824

ABSTRACT:
Gold, as well as copper, is recovered from copper bearing sulphidic material containing gold. The copper bearing sulphidic material is subjected to a main leach to provide a copper containing main leach liquor and a main residue. A secondary leach with ammonium thiosulphate solution is carried out on the copper bearing sulphidic material before the main leach, or on the residue from the main leach, to provide a gold containing secondary leach liquor and a secondary residue. Copper and gold are recovered from the respective leach liquors. Silver may also be recovered in addition to the gold.

REFERENCES:
patent: 1891532 (1932-12-01), Gibson
patent: 2093958 (1937-09-01), Edguist
patent: 2647819 (1953-08-01), McGauley
patent: 2693404 (1954-11-01), Mackiw
patent: 2807533 (1957-09-01), Abramson
patent: 2822263 (1958-02-01), Forward
patent: 3088820 (1963-05-01), Mackiw et al.
patent: 3137600 (1964-06-01), Margulies et al.
patent: 3669651 (1972-06-01), Spedden et al.
patent: 3975190 (1976-08-01), Van der Meulen et al.

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