从金冶炼渣中综合回收铁、金、银  

Comprehensive Recovery of Iron,Gold and Silver Form Roasting Gold Smelting Tailings

作　　者：王威[1,2] 张博[1,2] 曹耀华[1,2] 柳林[1] 刘红召[1,2] 高照国[1,2] 杨华玲[3] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]河南省黄金资源综合利用重点实验室,河南郑州450006 [3]南通大学化学与化学工程学院,江苏南通226019

出　　处：《湿法冶金》2015年第4期321-323,共3页Hydrometallurgy of China

基　　金：国土资源部地质调查项目(12120114021901);中科院长春应用化学研究所开放课题(RERU2014016);青年科学基金资助项目(21401110)

摘　　要：研究了从某金冶炼厂金冶炼渣中回收铁、金、银。考察了硫酸浓度、浸出温度和浸出时间对铁浸出率的影响,以及液固体积质量比、浸出时间、氰化钠用量对金、银浸出率的影响。试验结果表明:在硫酸浓度10.8mol/L、浸出温度90℃、浸出时间2h、液固体积质量比2.5∶1条件下,金冶炼渣中铁浸出率为90.85%;在液固体积质量比3∶1、浸出时间48h、体系pH≈11、氰化钠用量10kg/t条件下,铁浸出尾渣中金、银浸出率分别为72.8%和62.4%。The comprehensive recovery of iron,gold and silver from a roasting cyanide tailing was studied.The effects of sulfuric acid concentration,leaching temperature and leaching time on leaching rate of iron were examined.The results indicate that the leaching rate of iron is 90.85% under the conditions of sulfuric acid concentration of 10.8mol/L,leaching temperature of 90℃,leaching time of2 hand liquid to solid ratio of 2.5.The acid leaching residue was leached again using cyanide,and the recoveries of Au and Ag are 72.8% and 62.4%,respectively under the conditions of liquid to solid ratio of 3∶1,leaching time of 48 h,system pH of about 11 and NaCN usage of 10kg/t.

关 键 词：金冶炼渣 焙烧 硫酸 浸出 铁 金 银 

分 类 号：X758[环境科学与工程—环境工程]