低共熔溶剂处理含锌烟尘的研究

摘要

The feasibility to leach zinc from zinc-bearing dust with ChCl-urea(1 ∶ 2) Deep Eutectic Solvents as solvent and nitrilotriacetic acid (NTA) as chelating agent was studied.The effects of leaching temperature,leaching time,NTA concentration,and L/S on zinc leaching rate were investigated.The results show that zinc leaching rate is about 87％ under the optimum conditions including leaching temperature of 80 ℃,leaching time of 24 h,NTA concentration of 0.1 mol/L,and L/S=12.5.%探讨了采用ChCl-urea(1∶2)低共熔溶剂为溶剂、氨三乙酸(NTA)为螯合剂浸出含锌烟尘中锌的可行性.考察了浸出温度、浸出时间、NTA浓度、液固比对锌浸出率的影响.结果表明,在浸出温度为80℃、浸出时间24 h、NTA浓度0.1 mol/L、液固比12.5的条件下,锌浸出率可以达到87％左右.