Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1992-06-11
1993-08-17
Andrews, Melvyn J.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
C22B 312
Patent
active
052366766
ABSTRACT:
A method and apparatus are described for recovering gold from aqueous slurries of refractory gold ores containing sulfidic and/or carbonaceous matter. The method entails pretreating an ore slurry with chlorine in a multi-compartment autoclave operated at an elevated pressure. The chlorine used in this pressure chlorination pretreatment can be in either the gaseous or liquid state. Following the removal of residual chlorine from the pretreated ore slurry, said slurry is transferred to a conventional cyanide leach/carbon adsorption circuit to recover the gold values.
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Pickren Roy A.
Touro Freddie J.
Andrews Melvyn J.
Freeport-McMoRan, Inc.
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