Process for recovering gold from refractory sulfidic ores

Details Process for recovering gold from refractory sulfidic ores Process for recovering gold from refractory sulfidic ores

1988-10-31

1991-05-07

Lewis, Michael L.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

423 26, 423 27, 209164, C22B 1100, B03D 100

Patent

active

050133594

ABSTRACT:
A process for recovering gold from a refractory sulfidic ore which has been suspended in an aqueous slurry and oxidized using nitric acid so that substantially all of the gold in the ore is made available for recovery and at least a portion of the sulfidic components present during the oxidation are oxidized to elemental sulfur, comprises bubbling air as a discontinuous phase upwardly through the oxidized slurry, thereby creating a froth containing elemental gold and sulfur. The froth is separated from the slurry to provide a concentrate, and the gold is recovered from the concentrate.

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patent: 4670051 (1987-06-01), Schneider
patent: 4834793 (1989-05-01), Schneider et al.

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