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

B - Operations, Transporting

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B03D 1/02 (2006.01) C22B 3/06 (2006.01) C22B 3/22 (2006.01) C22B 9/05 (2006.01) C22B 11/08 (2006.01)

Patent

CA 2001432

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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