Reduction of metal sulfides

Details Reduction of metal sulfides Reduction of metal sulfides

1979-05-14

1981-01-06

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 21, 75 23, 75 28, 75 70, 75 71, 75 72, 75 77, 75 80, 75 82, 75 86, C22B 3100

Patent

active

042434114

ABSTRACT:
A method for the recovery of a desired metal (e.g., copper) from its sulfide ore by reaction with process metal (e.g., aluminum) capable of forming at least a high sulfide and subsulfide compound. The aluminum subsulfide compound is reacted with the copper sulfide at a first temperature to reduce the copper to metal form and to convert the aluminum to the high sulfide form. Then, the copper metal is separated and the aluminum high sulfide may be reconverted to the subsulfide form by heating to a second higher temperature at which the low sulfide is stable. After separation of the reduced sulfur, the aluminum subsulfide is recycled to reduce additional copper metal without consumption of process metal. The procedure may also be used to reduce and separate two or more metal sulfides (e.g., CuFeS.sub.2) by selective reduction with controlled amounts of processed metal.

REFERENCES:
patent: 807271 (1905-12-01), Imbert
patent: 894383 (1908-12-01), Imbert
patent: 2364727 (1944-12-01), Lebedeff
patent: 2653868 (1953-09-01), Lichty
patent: 3463630 (1969-08-01), Todd
patent: 3861904 (1975-01-01), Othmer

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