The leaching of gold in cyanide solutions in the presence of impurities - I. The effect of lead

被引：41

作者：

Jeffrey, MI ^{[1
]}

Ritchie, IM ^{[1
]}

机构：

[1] Murdoch Univ, AJ Parker CRC Hydromet, Murdoch, WA 6150, Australia

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2000年 / 147卷 / 09期

关键词：

D O I：

10.1149/1.1393892

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In the present study, a rotating electrochemical quartz crystal microbalance was used to investigate the effect of lead on the leaching of gold in aerated alkaline cyanide solutions. It was found that the addition of trace amounts of lead substantially increased the leaching rate, and it is believed that the role of lead was to modify the surface of the gold by cementation. Complementary electrochemical studies showed that lead acts in two ways: it reduces the overpotential required for the oxidation of gold and it enhances the reduction of oxygen. Thus, it is likely that bimetallic corrosion was occurring during gold leaching in the presence of lead. The effect of rotation rate, and cyanide and oxygen concentrations were investigated, and it was found that the action of lead was critically dependent on leaching conditions. (C) 2000 The Electrochemical Society. S0013-4651(00)03-050-5. All rights reserved.

引用

页码：3257 / 3262

页数：6

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