有色金属(冶炼部分)

采用碱性焙烧—浸出工艺处理高砷高锡阳极泥,考察了碱料比、焙烧温度、焙烧时间、液固比、浸出温度及浸出时间等对金属浸出率的影响。结果表明,优化条件为:碱料比0.9、焙烧温度600℃、焙烧时间2h、液固比3(mL/g)、浸出温度80℃、浸出时间2h。在此条件下,碱性焙烧—浸出工艺能实现砷锡高效分离,砷的回收率高达95.2%,浸出渣含砷<0.5%,其它有价金属有效富集以便后续回收。

High As and Sn bearing anode slime were treated by alkaline roasting and leaching.The effects of mass ratio of soda to anode slime,roasting temperature,roasting time,L/S,leaching temperature,and leaching time on leaching efficiency of metals were investigated.The results show that leaching rate of As is 95.2%and As content in leaching slag is 0.5% below under the optimum conditions including mass ratio of soda to anode slime of 0.9,roasting temperature of 600 ℃,roasting time of 2 h,L/S=3 mL/g,leaching temperature of 80℃,and leaching time of 2 h.Other valuable metals in anode slime are relatively enriched for further recycling.