Title: Extraction of gold from an Indian low-grade refractory gold ore through physical beneficiation and thiourea leaching
Abstract: The work carried out on the processing of a low-grade and refractory gold ore using thiourea is presented. Direct leaching of the "as-received" ore with thiourea has yielded only 16% gold extraction. Starting with ore containing 1.4 g/t of gold, it has been possible to generate a sulphide concentrate with 6.1 g/t of gold by physical beneficiation of the ore through froth flotation. Thiourea leaching of this flotation concentrate after pressure, pre-oxidation has resulted in gold extraction of 98%, with an overall gold recovery of 74%. Pressure oxidation was found to be slightly superior to roasting for the pre-oxidation of the refractory gold ore/concentrate.
Publication Year: 2003
Publication Date: 2003-02-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 56
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