硫代硫酸盐提金理论研究——金的阳极溶解

A theoretical study on gold extraction by thiosulfate leaching anodic dissolution of gold

本文研究了金在硫代硫酸盐溶液中的阳极溶解行为,结果表明,在氨性硫代硫酸盐溶液中金的阳极溶解机理为NH_3优先扩散至金粒表面与金离子络合,生成的金氨络离子进入溶液后被S_2O_3^(2-)取代,形成更稳定的金硫代硫酸根络离子。试验研究及理论分析证实和支持了这一机理。

The behavior of anodic dissolution of gold in thiosulfate solution was investigated in this paper. The mechanism of anodic dissolution of gold in ammoniacal thiosulfate solution is that NH3 will diffuse preferentially to the surface of gold particles and associat with gold ion to form Au(NH3)2+,which will be substituted by S2O32- to form more stable Au(S2O32-)23- when entering solution.