摘要
研究了以亚硫酸铵为还原剂,通过高温焙烧直接把软锰矿中的二氧化锰还原成硫酸锰,从而实现软锰矿的高效提取,考察了亚硫酸铵与软锰矿质量比、焙烧温度及时间、浸出温度及时间等对锰提取率的影响,确定了最佳工艺条件。结果表明:最优条件为亚硫酸铵与软锰矿质量比0.75∶1,焙烧温度500℃,焙烧时间1.5h,浸出温度25℃,浸出时间30min;在该条件下,锰浸出率约为93%,铁浸出率约9.5%。锰提取效果较好。
Manganese dioxide in pyrolusite was directly reduced to manganese sulfate by high-temperature roasting with ammonium sulfite as reducing agent,so as to achieve efficient extraction of pyrolusite.The effects of mass ratio of ammonium sulfite to pyrolusite,roasting temperature and time,leaching temperature and time on the extraction rate of manganese were investigated,and the optimum process conditions were determined.The results show that the optimal conditions are the mass ratio of ammonium sulfite to pyrolusite of 0.75∶1,roasting temperature of 500℃,roasting time of 1.5 h,leaching temperature of 25℃,leaching time of 30 min.Under the conditions,the leaching rate of manganese and iron is about 93% and about 9.5%,respectively.The extraction effect of manganese is good.
作者
黎应芬
胡林
王润玺
王志琦
LI Yingfen;HU Lin;WANG Runxi;WANG Zhiqi(College of Materials and Metallurgy Engineering,Guizhou Institute of Technology,Guiyang 550003,China)
出处
《湿法冶金》
CAS
北大核心
2024年第4期391-394,共4页
Hydrometallurgy of China
基金
贵州省教育厅高校科技创新团队(黔教技[2023]078号)。
关键词
软锰矿
亚硫酸铵
焙烧
还原
浸出
提取
锰
铁
pyrolusite
ammonium sulfite
roasting
reduction
leaching
extraction
manganese
iron
