分银渣中锡提取工艺  

Tin Extraction Process from Silver Separating Residue

作　　者：汪秋雨 蔡琥[1] 何强[2] 韩亚丽[2] 胡意文[2] 王日[2] 

机构地区：[1]南昌大学化学学院,南昌330031 [2]江西铜业集团公司,南昌330096

出　　处：《有色金属（冶炼部分）》2016年第7期22-25,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点基础研究发展计划(973计划)项目(2012CBA01204);国家自然科学基金资助项目(21162015)

摘　　要：采用"碱熔—水浸—除铅—沉锡"工艺从分银渣中提取锡。考察了氢氧化钠用量、焙烧温度和焙烧时间对锡和铅浸出率的影响。结果表明,在碱渣比为0.8、温度500℃、反应时间90min时,锡和铅的浸出率分别大于90%和85%;采用硫化钠除铅和石灰沉锡工艺,浸出液中铅的脱除率为99.9%,锡的沉淀率为97.6%;硫化铅渣达到YST 319-2013一级铅精矿标准,二氧化锡符合GB/T 26013-2010国家标准,锡回收率达到87.8%。Tin was extracted from silver separating residue applying the process composed of alkali fusion,water leaching,lead removal,and tin separation.The effects of NaOH dasoge,roasting temperature,and roasting time on leaching rates of Sn and Pb were investigated.The results show that leaching rate of Sn and Pb is 90 ％ and 85 ％ above respectively under the optimum conditions including mass ratio of NaOH to slag of 0.8,temperature of 500 ℃,and time of 90 min.Leaching solution was treated by lead removal with sodium sulfide and tin separation with lime with lead removal rate of 99.9％,and tin separation is 97.6％.Lead sulfide residue meets the first level standard of lead concentrates （YST 319-2013）.Stannic oxide meets the national standard （GB/T 26013-2010） with recovery rate of tin of 87.8％.

关 键 词：分银渣 焙烧 水浸 二氧化锡 

分 类 号：TF814[冶金工程—有色金属冶金]