Treatment of refractory carbonaceous and sulfidic ores or concen

Details Treatment of refractory carbonaceous and sulfidic ores or concen Treatment of refractory carbonaceous and sulfidic ores or concen

1989-01-12

1990-02-20

Stoll, Robert L.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75101R, 75103, 423 27, 423 32, 204109, C22B 1104

Patent

active

049023454

ABSTRACT:
The recovery of precious metals from refractory carbonaceous and sulfidic ores or concentrates is improved by subjecting an oxidized slurry of this type of ore to thiourea leaching in the presence of carbon instead of subjecting the slurry to cyanidation leaching.

REFERENCES:
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patent: 4289532 (1981-09-01), Matson et al.
patent: 4552589 (1985-11-01), Mason et al.
patent: 4561947 (1985-12-01), Schluze
patent: 4629502 (1986-12-01), Sherman et al.
patent: 4738718 (1988-04-01), Bakshani et al.
patent: 4778519 (1988-10-01), Pesic
patent: 4801329 (1989-01-01), Clough et al.

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