Behavior of silver and lead in selective chlorination leaching process of gold-antimony alloy

来源期刊:中国有色金属学报(英文版)2010年第2期

论文作者:LIU Wei-feng 杨天足 夏 星

文章页码:322 - 329

Key words:silver chloride; lead chloride; gold-antimony alloy; chlorination leaching

Abstract: The behavior of silver and lead in the selective chlorination leaching process of gold-antimony alloy was analyzed in detail and appropriate recovery methods were developed. A reduction method by adding gold-antimony alloy powder was adopted to recover silver according to the thermodynamics calculation. The reducing rate of silver can exceed 99% at 80 ℃ for 1.5 h when the dosage of gold-antimony alloy powder is 10%. The dissolution equilibrium curved surfaces of PbSO4 and PbCl2 under different conditions were drawn. The experimental results are well consistent with theoretical analysis that indicate lead may be precipitated in the form of lead chloride. The grade of gold in the residue can be further concentrated to 94.5% after being washed with hot water. These two methods have been applied successfully in the practice.

基金信息:the Key Project Science and Technology Program of Hunan Province of China

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