Process for the recovery of gold and/or silver and possibly bism

Details Process for the recovery of gold and/or silver and possibly bism Process for the recovery of gold and/or silver and possibly bism

1981-04-28

1982-08-03

Hearn, Brian E.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75109, 75118R, 75121, 75 7, 423 27, 423 41, C22B 1104, C22B 6100

Patent

active

043425917

ABSTRACT:
The present invention relates to a process for the recovery of gold and/or silver and possibly bismuth contained in sulfuretted ores and/or sulfoarsenides, wherein said ores, after having been subjected to a reducing roasting, then to an oxidizing roasting then a possible crushing, are treated by a first lixiviation with sulfuric acid followed by a lixiviation with thiourea under precise conditions of operation.

REFERENCES:
patent: 1818846 (1931-08-01), Giles
patent: 2304427 (1942-12-01), Sibley
patent: 2596580 (1952-05-01), McKay
patent: 2686114 (1954-08-01), McGauley
patent: 4185996 (1980-01-01), Zambrano
Chemical Abstracts, vol. 81, (1974), Nos. 9111s, 139006x.
Chemical Abstracts, vol. 71, (1969), No. 15,231r.
Chemical Abstracts, vol. 57, (1962), No. 10,888e.

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