铜阳极泥分银渣综合利用新工艺  

New technology of extracting metals from silver separated residue of copper anode slime

作　　者：邓成虎 张丽萍 DENG Chenghu;ZHANG Liping(Guixi Smelter,Jiangxi Copper Corporation,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：《中国有色冶金》2023年第2期31-38,共8页China Nonferrous Metallurgy

摘　　要：铜阳极泥分银渣是阳极泥提取贵金属的尾渣,产率约为阳极泥的50%,含有铅、锡、钡、锑、铋以及金银铂钯等有价金属,具有较大回收价值。传统的处理方法倾向于单一元素或者金银等贵金属的提取,从分银渣中回收钡等有价金属的方法较少。本文以铅、钡和锡含量高的铜阳极泥分银渣为原料,采用碳酸转铅-盐酸浸铅-碳酸转钡-盐酸浸钡-金银提取处理工艺分步直接提取铅和钡,考察了铅、锡、钡、金和银在工艺中的分离与富集,及其分布情况。结果表明:铜阳极泥分银渣中的铅、钡、锡的直收率分别为76.69%、93.16%和99.91%;铅、钡、锡分别以硫酸铅、硫酸钡、锡精矿的形式得到回收,品位分别达97.5%、95%和45.84%,金、银在分钡渣中富集率分别达98.74%,95.14%;锡精矿的产出率为23.44%。本工艺实现了铅、钡、锡、金、银的高效分离与综合回收,而且铅、钡的浸出体系循环使用,试剂消耗少、工艺条件温和,可为同类企业处理铜阳极泥提供参考。The silver separated residue of copper anode slime is the tailings of extracting precious metals from anode slime.The yield is about 50%of anode slime.It contains valuable metals such as lead,tin,barium,antimony,bismuth,gold,silver,platinum and palladium,and has great recovery value.Traditional treatment methods tend to extract single elements or precious metals such as gold and silver,and there are few methods to recover valuable metals such as barium.In this paper,silver separated residue of copper anode slime with high content of lead,barium and tin is used as raw material to test,and lead and barium were directly extracted step by step by the process of lead carbonate-hydrochloric acid leaching lead-barium carbonate-hydrochloric acid leaching barium-gold and silver extraction.The separation,enrichment and distribution of lead,tin,barium,gold and silver in the process were analyzed.The results show that the direct recovery rates of lead,barium and tin in the silver separated residue of copper anode slime are 76.69%,93.16%and 99.91%respectively.The lead,barium and tin were recovered in the form of lead sulfate,barium sulfate and tin concentrate,respectively.The grade of lead,barium and tin was 97.5%,95%and 45.84%,respectively,the enrichment of gold and silver in barium separated residue was 98.74%and 95.14%,respectively.The yield of tin concentrate is 23.44%.This process realizes the efficient separation and comprehensive recovery of lead,barium,tin,gold and silver.The leaching system of lead and barium is recycled,with less reagent consumption and mild process conditions.It can provide reference for similar enterprises to treat copper anode slime.

关 键 词：铜阳极泥 分银渣 铅回收 锡回收 钡回收 贵金属富集 资源综合利用 绿色冶金 

分 类 号：TF811[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]