Process for roasting refractory gold ores

Details Process for roasting refractory gold ores Process for roasting refractory gold ores

1994-05-02

1995-06-20

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

423 47, 423DIG16, C22B 110

Patent

active

054257999

ABSTRACT:
Refractory gold ores are roasted at temperatures from 500.degree. to 650.degree. C. in an oxidizing atmosphere in a fluidized bed, which is supplied with a carbonaceous additional fuel. To effect a substantially complete combustion of the additional fuel to form CO.sub.2 and H.sub.2 O, methanol is added as a carbonaceous fuel.

REFERENCES:
patent: 5123956 (1992-06-01), Fernandez et al.

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