碲化铜渣中碲回收工艺研究  

Research on the Process of Tellurium Recovery from Copper Telluride Slag

作　　者：董旭龙 邹小平 蒋应平 章小兵 孟晓飞 DONG Xuong;ZOU Xiaoping;JIANG Yingping;ZHANG Xiaobing;MENG Xiaofei(BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]矿冶科技集团有限公司,北京100160

出　　处：《中国资源综合利用》2024年第10期1-3,共3页China Resources Comprehensive Utilization

摘　　要：碲是重要的半导体材料,应用广泛。碲属于稀散金属,一般伴生于铜矿、铅矿与铋矿等金属矿中。目前,工业制备碲的主要原料来自电解精炼铜、镍时副产的阳极泥。铜阳极泥处理过程中,部分碲会跟铜一起浸出到水中,加入铜粉时产生碲化铜渣。试验对碲化铜渣中碲的回收利用进行研究,采用“硫酸化焙烧+水浸脱铜+碱浸提碲+中和沉碲”工艺制备二氧化碲,二氧化碲经酸溶和亚硫酸氢钠还原制备碲粉。其间考察焙烧温度、碱浸温度等对碲浸出效果的影响,并对亚硫酸氢钠还原制备碲粉进行探索性研究。结果表明,在优化的工艺条件下,碲的回收率大于90%,得到的碲粉纯度大于90%。Tellurium is an important semiconductor material with a wide range of applications.Tellurium is a rare and scattered metal,generally found in metallic ores such as copper,lead,and bismuth.At present,the main raw material for industrial preparation of tellurium comes from the anode mud produced as a byproduct during electrolytic refining of copper and nickel.During the treatment of copper anode mud,some tellurium will leach into water together with copper,and copper telluride slag will be produced when copper powder is added.In the experiment,the recovery and utilization of tellurium from copper telluride slag is studied,and the process of“sulfuric acid roasting+water leaching to remove copper+alkali leaching to extract tellurium+neutralization and precipitation of tellurium”is used to prepare tellurium dioxide,which is then dissolved in acid and reduced with sodium bisulfite to prepare tellurium powder.During this period,the influence of calcination temperature,alkaline leaching temperature,etc.on the leaching effect of tellurium is investigated,and exploratory research is conducted on the preparation of tellurium powder by reduction with sodium bisulfite.The results show that under optimized process conditions,the recovery rate of tellurium is greater than 90%,and the purity of tellurium powder obtained is greater than 90%.

关 键 词：碲化铜渣 碲回收 硫酸化焙烧 碱浸 还原 

分 类 号：TQ125.3[化学工程—无机化工]