Reaction chemistry of gold leaching in thiourea solution for a Turkish gold ore

This study was carried out on a finely disseminated gold-bearing ore from Kaymaz, Turkey. The main objective was to determine the mechanism of reaction between thiourea and Fe 3+ in the thiourea leaching of gold. Thiourea consumption levels were also examined during the leaching operations for diffe...

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Bibliographic Details
Published in:Hydrometallurgy 2002-12, Vol.67 (1), p.71-77
Main Authors: Örgül, S, Atalay, Ü
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Ferric sulfate
Gold leaching
Hydrometallurgy
Metals. Metallurgy
Production of metals
Production of non ferrous metals. Process materials
Thiourea
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Summary:This study was carried out on a finely disseminated gold-bearing ore from Kaymaz, Turkey. The main objective was to determine the mechanism of reaction between thiourea and Fe 3+ in the thiourea leaching of gold. Thiourea consumption levels were also examined during the leaching operations for different leaching parameters, i.e., molar ratio of ferric sulfate/thiourea, pH, and temperature. The leaching using the thiourea process was compared with cyanidation. In optimum leach conditions, 85.8% gold extraction was obtained with feed of −53 μm particle size in 6 h.
ISSN:0304-386X
1879-1158
DOI:10.1016/S0304-386X(02)00136-6