Reduction roasting of metal ores

Details Reduction roasting of metal ores Reduction roasting of metal ores

1988-07-20

1991-01-15

Russel, Jeffrey E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

75419, 423 49, C01G 500, C01G 4502, C22B 312, C22B 1108

Patent

active

049852167

ABSTRACT:
A process is provided for the reduction roasting of ores using a C.sub.2 to C.sub.8 hydrocarbon. The process is particularly applicable to manganese dioxide containing ores and provides enhanced reduction of the manganese to lower oxidation states at low operating temperatures for manganese dioxide ores and provides increased silver recoveries from refractory manganese-silver ores.

REFERENCES:
patent: 1232216 (1917-07-01), Caron
patent: 3929468 (1975-12-01), Siemens et al.
patent: 3997333 (1976-12-01), Fey
patent: 4029498 (1977-06-01), Okajima
Rose, Arthur and Elizabeth, Condensed Chemical Dictionary, 5th Ed., Reinhold Pub. Co., New York, 1956, p. 759.
G. H. Clevenger, and M. H. Caron, "The Treatment of Manganese-Silver Ores", published by Dept. of Interior, Bureau of Mines, #226.
Chase, C. K. et al, Treatment of Manganiferous Silver Ores for Recovery of Silver in View of Changed Precious Metal Economics, from 110th AIME Meeting in Chicago, Ill., Feb. 22-26, 1981.

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