锡冶炼烟尘中锡、锌、镉的分离回收工艺研究  

Separation and Recovery Process of Tin,Zinc,and Cadmium from Tin Smelting Dust

作　　者：施善林 路文 曹昕宇 肖发新 SHI Shanlin;LU Wen;CAO Xinyu;XIAO Faxin(Shenyang Nonferrous Metals Research Institute Co.,Ltd.,Shenyang 110141,China;School of Metallurgy,Northeastern University,Shenyang 110141,China)

机构地区：[1]沈阳有色金属研究院有限公司,辽宁沈阳110141 [2]东北大学冶金学院,辽宁沈阳110141

出　　处：《湿法冶金》2024年第4期380-384,共5页Hydrometallurgy of China

基　　金：中国有色集团科技计划项目(2022KJJH05)。

摘　　要：研究了采用硫酸浸出—氧化水解脱砷—锌粉置换镉工艺分离回收锡冶炼烟尘中的锡、锌、镉,考察了各因素对分离回收效果的影响。结果表明:在初始硫酸浓度15%、液固体积质量比3∶1、浸出时间120min、浸出温度90℃条件下,Zn、Cd浸出率分别为93.25%、89.35%,Sn浸出率小于0.1%;浸出液在双氧水加入量为2%、控制终点pH为5时,除砷后夜中As质量浓度降至0.1mg/L;除砷后液在反应温度60℃、锌粉用量为理论量1.0倍、搅拌速度250r/min、反应时间30min条件下,可得到含镉95%以上的海绵镉。该工艺可实现锡冶炼烟尘中有价金属高效回收利用。The sparation and recovery of tin,zinc and cadmium from tin smelting dust by sulfuric acid leaching—removing arsenic with oxidation hydrolysis—replacing cadmium with zinc powder were studied.And the effects of various factors on the sparation and recovery were investigated.The results show that the leaching rates of Zn and Cd are 93.25% and 89.35%,respectively,and the leaching rates of Sn are less than 0.1%under the conditions of initial sulfuric acid concentration of 15%,liquid volume to solid mass ratio of 3∶1,leaching time of 120 min and leaching temperature of 90℃.When the amount of hydrogen peroxide is 2% and the control end point pH is 5,the mass concentration of As in the leaching solution can decrease to 0.1 mg/L after arsenic removal.Under the conditions of reaction temperature of 60℃,dosage of zinc powder 1.0 times of the theoretical amount,stirring speed of 250 r/min and reaction time of 30 min,sponge cadmium with cadmium content above 95%is obtained.The process can realize efficient recovery and utilization of valuable metals in tin smelting dust.

关 键 词：锡冶炼烟尘 有价金属 回收 浸出 锡 锌 镉 分离 

分 类 号：TF803.21[冶金工程—有色金属冶金] TF813TF814TF819.2