用硫化铅精矿还原酸浸低品位软锰矿试验研究  

Leaching of Manganese by Sulfuric Acid From Low-grade Pyrolusite Using Lead Sulfide Concentrate as Reductant

作　　者：贺山明[1] 汪金良[1] 陈艺琳[2] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000 [2]江西理工大学外语外贸学院,江西赣州341000

出　　处：《湿法冶金》2015年第2期105-108,共4页Hydrometallurgy of China

基　　金：江西理工大学博士启动基金资助项目(jxxjbs13012)

摘　　要：研究了以废铁屑作添加剂、硫化铅精矿作还原剂,用硫酸浸出低品位软锰矿,考察了配料质量比、温度、硫酸浓度、反应时间、液固体积质量比对锰浸出率的影响。试验结果表明:控制浸出条件可获得96.17%的锰浸出率,铅几乎全部进入渣中;锰的浸出与S0的形成及浸出温度密切相关,硫酸浓度(矿浆pH)对S0的形成影响最大;优化后的浸出条件为m(软锰矿)∶m(铅精矿)∶m(铁屑)=3∶1∶1,反应时间2h,硫酸浓度2mol/L,浸出温度90℃,液固体积质量比5∶1,矿石粒径-74μm占90%以上。Leaching of low-grade pyrolusite using sulfuric acid as leaching agent,lead sulfide concentrate as reducing agent and scrap iron as addition agent was studied.The influences of ingredients ratio,leaching temperature,sulfuric acid concentration,reaction time,liquid-solid ratio on manganese leaching were examined.The results show that the manganese leaching rate can reach96.17% and almost all lead into the leaching slag under the appropriate conditions.The formation of elemental sulfur and leaching temperature have significant influence on manganese leaching.The affecting formation of elemental sulfur is concentration of sulfuric acid（slurry pH）.Optimal leaching conditions are m（pyrolusite）∶m（galena）∶m（iron）of 3∶1∶1,reaction time of 2hours,sulfuric acid concentration of 2mol/L,leaching temperature of 90 ℃,liquid-solid ratio of 5∶1,ore particle size of-74μm accounting for 90%.

关 键 词：低品位软锰矿 硫化铅精矿 硫酸 锰 浸出 

分 类 号：TF792[冶金工程—钢铁冶金]