摘要
本文针对某贵金属含量较高、铜含量较低的复杂粗铜进行电解试验研究,实现铜与贵金属及其他有价元素的高效回收。试验结果表明,在铜离子浓度45 g/L、电流密度为200~250 A/m^(2)、温度为45℃、循环速度为20~40 m L/min的条件下,阴极铜形貌致密光滑,电流效率>97%;当控制电解液中Ag^(+)<0.03 g/L、Cl^(-)<0.01 g/L时,可有效避免阴极铜的银夹杂和表面粗糙;电解液中添加0.01 g/L骨胶,可使阴极铜纯度提升至99.95%。试验所得阴极铜纯度达99.95%,Au及Ag含量较低,分别为0.0002%和0.0012%;粗铜中的贵金属高效富集于阳极泥中,Au品位提升至8.43%,较原料富集8.3倍,Ag品位提升至0.35%,较原料富集11.6倍。
In this paper,the electrolytic experiment of a complex crude copper with high precious metal content and low copper content was carried out to realize the efficient recovery of copper and precious metals and other valuable elements.The results show that under the conditions of copper ion concentration of 45 g/L,current density of 200~250 A/m^(2),temperature of 45℃and cycle speed of 20~40 mL/min,the morphology of cathode copper is dense and smooth,and the current efficiency is more than 97%.When Ag^(+)<0.03 g/L and Cl^(-)<0.01 g/L in the electrolyte are controlled,the silver inclusion and surface roughness of cathode copper can be effectively avoided.Adding 0.01 g/L bone glue to the electrolyte can increase the purity of cathode copper to 99.95%.The purity of cathode copper was 99.95%,and the contents of Au and Ag were 0.0002%and 0.0012%,respectively.The precious metals in the crude copper are efficiently enriched in the anode slime.The Au grade is increased to 8.43%,which is 8.3 times higher than that of the raw material,and the Ag grade is increased to 0.35%,which is 11.6 times higher than that of the raw material.
作者
刘胜宏
鲁艺珍
刘金生
杨文魁
LIU Shenghong;LU Yizhen;LIU Jinsheng;YANG Wenkui(Jiangxi Jinde Lead Industry Co.,Ltd.,Dexing 334202,China;Jiangxi Copper Technology Research Institute Co.,Ltd.,Nanchang 330500,China)
出处
《绿色矿冶》
2025年第6期35-41,共7页
Sustainable Mining and Metallurgy
关键词
低品位粗铜
铜电解精炼
铜阳极泥
添加剂
贵金属回收
low grade crude copper
copper electrorefining
copper anode slime
additives
precious metal recovery
