高铜载金炭铁盐法脱铜试验研究  

Experimental study on copper removal from high copper content gold-loaded carbon with ferric salt method

作　　者：陈庆根 Chen Qinggen(State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Ores;Xiamen Zijin Mining and Metallurgy Technology Co.,Ltd.)

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 [2]厦门紫金矿冶技术有限公司

出　　处：《黄金》2020年第1期51-54,共4页Gold

基　　金：福建省科技计划重点项目(2013I0014)

摘　　要：某高铜载金炭中金品位2. 58 kg/t,铜品位50. 85 kg/t。针对该载金炭中铜品位高,影响吸附作业的问题,采用铁盐法进行脱铜试验研究,并考察脱铜液再生利用的影响因素。结果表明:采用铁盐法脱铜工艺处理高铜载金炭,在液炭比9∶1,脱铜时间6 h,脱铜温度25℃,氯化铁用量6 kg/t,硫酸用量15 kg/t的条件下,脱铜率可达97. 52%,且金基本不被浸出;脱铜液采用萃取-反萃工艺处理,可实现铜的综合回收,萃余液通过空气氧化后返回脱铜作业循环利用,脱铜率可达到97. 46%。The gold grade is 2. 58 kg/t and the copper grade is 50. 85 kg/t in a high copper content gold-loaded carbon. Since adsorption is affected by the high copper content in the gold-loaded carbon,experimental study is carried out with ferric salt method to remove copper and investigates the factors that influence the regeneration of copper removal solutions. The results show that when copper is removed from the high copper content gold-loaded carbon with ferric salt method and the conditions are: liquid-carbon ratio 9 ∶ 1,copper removal time 6 h,copper removal temperature 25 ℃,ferric chloride dosage 6 kg/t,sulfuric acid dosage 15 kg/t,the copper removal rate can reach 97. 52 % while gold is hardly leached;copper removal solutions are treated by solvent extraction-reverse extraction process,which can achieve the comprehensive recovery of copper. The raffinate can be recycled to copper removal operation after air oxidation and can still obtain a copper removal rate of 97. 46 %.

关 键 词：高铜载金炭 铁盐法 氯化铁 脱铜 萃取 脱铜液 

分 类 号：TD926.1[矿业工程—选矿]