氯盐体系浸出铜阳极泥分银渣中铅银的工艺研究  

Leaching Lead and Silver from Silver Separation Slag of Copper Anode Slime Based on Chloride Salt System

作　　者：阙旺东 邓成虎 王达之 王京慧 QUE Wang-dong;DENG Cheng-hu;WANG Da-zhi;WANG Jing-hui(Guixi Smelter,Jiangxi Copper Company Limited,Guixi 335424,China)

机构地区：[1]江西铜业股份有限公司贵溪冶炼厂,江西贵溪335424

出　　处：《有色矿冶》2024年第5期30-34,共5页Non-Ferrous Mining and Metallurgy

摘　　要：研究了在NaCl-CaCl_(2)-HCl氯盐体系下,从铜阳极泥分银渣中浸出铅和银的工艺。通过正交试验,探索NaCl初始浓度、HCl初始浓度、液固体积质量比,反应温度和反应时间对铜阳极泥分银渣中铅和银回收的影响。结果表明:氯盐体系下,铜阳极泥分银渣铅和银浸出最佳工艺条件为:NaCl初始浓度260 g·L^(-1)、HCl初始浓度1.0 mol·L^(-1)、液固体积质量比9∶1,反应温度80℃和反应时间1.5 h。在最佳工艺条件基础上,探索得出最佳CaCl2用量为理论用量的2倍。经最佳工艺条件验证实验可得,铅和银的平均浸出率分别为98.24%和97.73%。各组数据表现稳定,波动较小,该氯盐体系浸出铜阳极泥分银渣中的铅和银效果较好。The process of leaching lead and silver from silver residue of copper anode mud in the NaCl-CaCl_(2)-HCl chloride salt system was studied.Through orthogonal experiments,the effects of initial concentration of NaCl,initial concentration of HCl,liquidsolid volume mass ratio,reaction temperature and reaction time on the recovery of lead and silver from silver slag in copper anode mud separation were explored,the results showed that under the chloride salt system,the optimal process conditions for leaching silver slag,lead,and silver from copper anode mud were initial NaCl concentration of 260 g·L^(-1),initial HCl concentration of 1.0 mol·L^(-1),liquid-solid volume to mass ratio of 9∶1,reaction temperature of 80℃,and reaction time of 1.5 h.Based on the optimal process conditions,the optimal amount of CaCl_(2) was explored to be twice the theoretical amount.After verifying the optimal process conditions,the average leaching rates of lead and silver were 98.24% and 97.73%,respectively.The performance of each group of data is stable with small fluctuations,and the chloride salt system has a good effect on leaching lead and silver from silver residue.

关 键 词：氯盐体系 铜阳极泥 分银渣 铅银回收 

分 类 号：TF812[冶金工程—有色金属冶金] TF832