Leaching of Gold and Silver with Ferricyanide-cyanide Solution

摘要：

Low gold and silver leaching kinetics has been commonly observed in traditional gold-silver cyanidation process, especially in those heap-leaching operations. The reactivity and availability of oxidant was believed to be the critical limitation for gold and silver dissolution. The occurrence of silver sulfide such as acanthite (Ag2S) in the ore may also result in low overall silver extraction.Leaching of gold and silver sulfide in the ferricyanide-cyanide solution has been investigated through rotating disc tests and the assistant effect of ferricyanide on increasing the dissolution rate of gold and silver was noticed. The potential use of ferricyanide as an auxiliary oxidant in gold/silver cyanidation process was proposed based on the results of leaching of gold-silver ores.

关键词： Ferricyanide Cyanidation Gold Silver Sulfide

作者: F. Xie D. B. Dreisinger

作者单位: Department of Materials Engineering, University of British Columbia, Canada

会议类型: 国际会议

会议名称: XXIV International Mineral Processing Congress(第24届国际矿物加工大会)

会议地点: 北京

会议语种:英文

页码: 2894-2898

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）