Murthy, D S R and Kumar, Vinod and Rao, K V (2003) Extraction of gold from an Indian low-grade refractory gold ore through physical beneficiation and thiourea leaching. Hydrometallurgy, 68 (1-3). pp. 125-130.
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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.
|Uncontrolled Keywords:||Low-grade gold ores; Leaching; Refractory ores; Floatation|
|Divisions:||Material Science and Technology|
|Deposited By:||INVALID USER|
|Deposited On:||16 Nov 2009 15:35|
|Last Modified:||25 Jan 2012 11:32|
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