摘要
在分析湿法炼锌铅银渣的主要成分与化学物相的基础上,考察了温度、浸出时间、氯酸钠浓度、酸度等对铅银渣中铅银含量及浸出率的影响,确定了氯化浸出最优工艺条件为:氯化钠浓度300 g/L、氯化钙浓度50 g/L、初始盐酸0.4 mol/L、浸出温度85℃、浸出时间2.5h、液固比8,在该条件下铅银渣中铅、银的浸出率分别可达94.43％和91.48％,渣中铅含量为0.9％,银含量84.4 g/t.
Abstract
Based on analysis of composition and chemical phases,effects of temperature,leaching time,sodium chlorate concentration,and acidity on lead and silver extraction from lead-silver residue produced in hydrometallurgical zinc refinery were investigsted.The results show that leaching ratio of lead and silver is 94.43％ and 91.48％ respectively,and lead and silver content in residue is 0.9％ and 84.4 g/t respectively under the optimum conditions including NaCl concentration of 300 g/L,CaCl2 concentration of 50 g/L,initial HCl concentration of 0.4 mol/L,leaching temperature of 85 ℃,leaching time of 2.5h,and L/S=8.
NETL
NSTL
维普
万方数据