Behavior of S2O32− and SO32− in sulfur-bearing aqueous solution system for gold leaching

TG1; The concentrations of S2O32- and SO32- were measured in gold leaching systems, including thiosulfate system, polysulfide system and the modified lime sulfur synthetic solution (ML) system in the process of chemical reaction. The interactions among S2O32-, SO32- and S2- were discussed. The behav...

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Published in:Transactions of Nonferrous Metals Society of China 2010-05, Vol.20 (z1), p.s46-s49
Main Authors: CHEN, Xiang-yang, LAN, Xin-zhe, ZHANG, Qiu-li, ZHOU, Jun, SONG, Yong-hui
Format: Article
Language:English
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Summary:TG1; The concentrations of S2O32- and SO32- were measured in gold leaching systems, including thiosulfate system, polysulfide system and the modified lime sulfur synthetic solution (ML) system in the process of chemical reaction. The interactions among S2O32-, SO32- and S2- were discussed. The behavior mechanism of sulfur-bearing reagents was proposed to describe the process reactions and their Gibbs free energy. The proper quantity oxygen and SO32- reduce decomposition of S2O32- and react with sulfur derived from the decomposition of SX2-. So, SO32- ions have action to stabilize sulfur-bearing system and are favorable to leach gold.
ISSN:1003-6326
DOI:10.1016/S1003-6326(10)60010-6