从高盐矿区难处理金矿石中浸出金试验研究  

Leaching of Gold from Refractory Gold Ores in High Salt Mining Area

作　　者：伍赠玲 王乾坤 王弘 陈水波 傅福金 季常青 WU Zengling;WANG Qiankun;WANG Hong;CHEN Shuibo;FU Fujin;JI Changqing(State Key Laboratory for Comprehensive Utilization of Low Grade Refractory Gold Ores,Xiamen 361101,China)

机构地区：[1]低品位难处理黄金资源综合利用国家重点实验室,福建厦门361101

出　　处：《湿法冶金》2023年第4期341-346,共6页Hydrometallurgy of China

基　　金：福建省对外合作项目(2021I1012)。

摘　　要：针对某高盐矿区难处理金矿,研究了采用盐水浮选—脱盐水生物氧化—氰化浸出工艺浸出金。结果表明:用现场盐水浮选原矿,可产出Au品位29.89 g/t、As品位6.94%、金回收率91.78%的金精矿;通过电渗析脱盐工艺可将高氯盐水中氯离子质量浓度从10 g/L降至1.5 g/L,减小对浮选金精矿生物预氧化的不利影响;氧化液返回酸化可促进生物预氧化效率;氧化渣氰化提金可以利用矿区盐水,金浸出率可达90.9%、尾渣金品位可降至0.62 g/t,相对于原矿的金综合回收率为83.0%。该工艺可有效利用高盐矿区盐水,大幅降低盐水对生产的影响,显著提高金综合回收率,达到有效开发高砷难处理金矿资源的目的。The leaching of gold from the refractory gold ores in high salt mine with the process of site salty water flotation—bio-oxidation of concentrate—cyanide leaching was studied.The results show that the gold grade of flotation concentrate is 29.89 g/t,arsenic grade is 6.94% and gold recovery is 91.78% using brine flotation process.Electrodialysis desalination process is conducted to reduce chloride ion mass concentration from 10 g/L to 1.5 g/L in order to reduce the negative impact of chloride on bio-oxidation of gold concentrate.Recycling of bio-oxidation product solution to acidulation of concentrate seemes to be beneficial for improving bio-oxidation performance.Site salty water can be used in carbon-in-leach cyanidation,leaching rate of gold is 90.9%,the gold grade of residue reduces to 0.62 g/t and the overall gold recovery to raw ore is 83%.This process can effectively utilize the site salty water in high-salt mining area,greatly reduce the influence of salty water on production,significantly increase the overall gold recovery,and effectively develop the high arsenic refractory gold resources.

关 键 词：高氯盐水 难处理金矿 氰化浸出 金 生物预氧化 电渗析脱盐 

分 类 号：TF803.21[冶金工程—有色金属冶金] TF831