Gold recovery from refractory carbonaceous ores by pressure oxid

Details Gold recovery from refractory carbonaceous ores by pressure oxid Gold recovery from refractory carbonaceous ores by pressure oxid

1996-07-16

1998-07-28

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75744, 204109, C22B 346

Patent

active

057857369

ABSTRACT:
A process for treatment of precious metal ores in which gold is leached from an oxidized ore slurry using a thiosulfate salt lixiviant and copper catalyst. Gold and copper are subsequently loaded onto an ion exchange resin. Copper is recovered from the resin by elution with a thiosulfate solution; gold is recovered from the resin by elution with a thiocyanate colution. Gold is recovered from the eluate by precipitation, electrowinning, or cementation.

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