难处理铅锌矿酸浸渣回收硫酸铅的工艺研究  

Study on recovery lead sulfate from complex acid leaching residue of lead-zinc mine

作　　者：张传宝[1] 颜文斌[1] 徐辉[1] 高峰[1] 华骏[1] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000

出　　处：《应用化工》2012年第7期1188-1192,共5页Applied Chemical Industry

基　　金：湖南省科技计划项目(2008GK3003);吉首大学研究生科研创新项目

摘　　要：采用氯化钠-硫酸混合溶液对铅锌矿难处理酸浸渣进行浸出,对浸出液稀释,制备硫酸铅,考察了氯化钠浓度、液固比、时间、温度和硫酸浓度等因素对酸浸渣的浸出影响和考察稀释倍数、时间等因素对沉淀硫酸铅的影响。结果表明,在氯化钠浓度为330 g/L,液固比为7∶1,时间为1.5 h,温度95℃,硫酸浓度为1 mol/L的条件下,铅的浸出率为82.1%;在浸出液稀释倍数为2.5,静置时间7 h的条件下,硫酸铅的沉淀率为93%,产品纯度为99.1%。铅的回收率为76%,比传统方法提高30%以上。The extraction process using sodium chloride and sulfuric acid mixed solution, leaching lead from complex acid leaching residue of lead-zinc mine and preparing the lead sulfate by dilute leaching so- lution. The influences of sodium chloride concentration, the liquid-solid ratio, time, temperature, acid con- centration on lead leaching rate and diluted times, time on the lead sulfate precipitation was discussed. The results showed that the lead leaching rate of 82. 1%. when sodium chloride concentration of 330 g/L, sulfuric acid concentration of 1 tool/L, the liquid-solid ratio of 7 ： 1 at 95℃ for 1.5 h, the purity of 99.1% products. The leaching solution in diluted times of 2.5 for standing time 7 h ,lead sulfate precipi- tation rate was 93%. The lead recovery rate was 76% ,it was improved by more than 30% compared with the traditional method.

关 键 词：铅锌矿 酸浸渣 硫酸铅 浸出 

分 类 号：TQ624.89[化学工程—精细化工] X758[环境科学与工程—环境工程]