乙二胺四乙酸二钠对铜粉置换硫代硫酸盐金的影响  

Effect of Ethylenediamine Tetraacetic Acid Disodium on Cementation of Gold with Copper Powder from Thiosulphate Solution

作　　者：王治科[1] 李娟[1] 李永芳[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南省环境污染控制重点实验室,黄淮水环境与污染防治省部共建教育部重点实验室,河南新乡453007

出　　处：《有色金属（冶炼部分）》2013年第3期44-46,50,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：河南省基础与前沿技术研究计划项目(102300410097,122300410271)

摘　　要：探讨了铜粉置换硫代硫酸盐金时,硫代硫酸盐浸金体系氧化剂二价铜离子对该置换反应的负面影响。结果表明,加入乙二胺四乙酸二钠能消除氧化剂的抑制作用,提高金置换率。比较了硫氰酸盐、硫脲和硫代硫酸盐等浸金体系的氧化剂对置换回收金产生抑制作用的共性原因,分析了克服其负面影响方法的共同特点。The negative effect of cupric ions as oxidant in thiosulphate leaching system on gold cementation from thiosulphate solution with copper powder was investigated. The results show that adding ethylenediamine tetraacetic acid disodium into leaching solution can eliminate the inhibitory effect of cupric ions and improve the cementation rate of gold. The common causes of the negative effect of the oxidants from thiocyanate, thiourea and thiosulphate leaching systems on gold cementation from the corresponding leaching solution are compared. The common characteristics of the methods to eliminate the negative effects are analyzed.

关 键 词：金 置换 硫代硫酸盐 铜粉 乙二胺四乙酸二钠 

分 类 号：TF831[冶金工程—有色金属冶金]