Process for thermal-activation of chalcopyrite-pyrite concentrat

Details Process for thermal-activation of chalcopyrite-pyrite concentrat Process for thermal-activation of chalcopyrite-pyrite concentrat

1978-08-14

1980-05-06

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

75 1R, 75 6, 75 7, 423 23, 423 37, 423 47, 423145, 423150, 423571, 423542, 423563, 423151, C01G 312, C01G 4914

Patent

active

042017483

ABSTRACT:
A process for thermal activation of chalcopyrite-pyrite ore concentrates for activation of iron values in both chalcopyrite and pyrite constituents whereby said iron values can be selectively removed in a subsequent acid leach. Controlled oxidizing conditions are maintained in an oxidizing heating zone for removal of up to about 90% of total sulfur to be removed for conversion of pyrite and chalcopyrite to their acid-leachable forms, measured by a preferable oxidation of 10 to 15% of iron in the concentrate to ferromagnetic oxides, whereby remaining total sulfur to be removed is removed in a reducing zone with the assistance of a low H.sub.2 S/(H.sub.2 +H.sub.2 S) ratio by scavenging of H.sub.2 S by said oxides.

REFERENCES:
patent: 2878102 (1959-03-01), Sternfels
patent: 3053651 (1962-09-01), McGauley
patent: 3169853 (1965-02-01), Van Es
patent: 3964901 (1976-06-01), Swinkels et al.
Swinkels et al., "The Sherritt-Cominco Process" CIM Bulletin Feb. 1978, pp. 105-108, 110, 112-114, 121, 132, 134, 136, 137.

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