用富镁低品位锰矿石制备硫酸锰的试验研究  

Research on Preparation of Manganese Sulfate From Low-grade Rich Magnesium Pyrolusite

作　　者：耿叶静[1] 刘静[1] 曹向会[1] 周娥[2] 陈思明[2] 夏光祥[2] 

机构地区：[1]中国科学院唐山高新技术研究与转化中心,河北唐山063000 [2]中国科学院过程工程研究所,北京100190

出　　处：《湿法冶金》2012年第6期376-379,共4页Hydrometallurgy of China

基　　金：中科院院地合作项目基金资助项目(Y123141149);唐山市科学技术研究与发展计划基金资助项目(10160201A-8)

摘　　要：针对低品位富镁软锰矿,研究了预脱镁—黄铁矿还原酸浸—制备硫酸锰。结果表明,在液固体积质量比3.5∶1、温度35℃、反应时间4h条件下,矿石脱镁率为86%;以脱镁渣为原料,在反应温度95℃、反应时间3h、物料配比n(MnO2)∶n(FeS2)∶n(H2SO4)=1∶0.18∶2.0条件下,锰浸出率为97%;所得硫酸锰的纯度较高,达到工业硫酸锰行业标准。The process of pre-removal of magnesium-leaching manganese with sulfuric acid and pyrite-preparing manganese sulfate from low-grade high magnesium pyrolusite has been studied.The results show that eliminating ratio of magnesium was up to 86% at the conditions of liquid to solid of 3.5∶1,temperature of 35 ℃ and reaction time of 4 h.Using the residue removed magnesium as raw material to leach manganese,leaching rate of manganese was up to 97% at the conditions of temperature of 95 ℃,reaction time of 3 h and n(MnO2)∶n(FeS2)∶n(H2SO4) of 1∶0.18∶2.0.The purity of the manganese sulfate reach industrial manganese sulfate standards.

关 键 词：富镁软锰矿 脱镁 黄铁矿 还原 酸浸 硫酸锰 

分 类 号：TQ137.12[化学工程—无机化工]