硫酸熟化硫粉还原电解锰阳极渣制备四氧化三锰工艺研究  

Study on the Process of P reparing Manganese Tetroxide with Electrolytic Manganese Anode Slag by Sulfuric Acid Curing and Sulfur Reducing

作　　者：彭商权 刘剑 韦玉红 章聪华 肖佳俊 颜文斌[1] PENG Shangquan;LIU Jian;WEI Yuhong;ZHANG Conghua;XIAO Jiajun;YAN Wenbin(College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China)

机构地区：[1]吉首大学化学化工学院,湖南吉首416000

出　　处：《金属矿山》2023年第1期233-238,共6页Metal Mine

基　　金：湖南省教育厅科学研究项目(编号:20A406)。

摘　　要：为探究绿色高效的还原浸出体系,以电解锰阳极渣为原料,硫粉为还原剂,采用浓硫酸熟化后浸出锰,浸出液经浓缩、除杂后,通过碳酸盐沉锰—焙烧法制备得到四氧化三锰。结果表明:在熟化温度为125℃,酸固体积质量比为0.8 mL/g,熟化时间为20 h,硫粉/锰阳极渣质量比为0.18 g/g,浸出时间为1 min的条件下,阳极渣中锰的浸出率可达96.15%;使用除杂后的浸出液制备得到的四氧化三锰颗粒均匀,呈疏松多孔结构,其锰含量达到71.81%。硫酸熟化硫粉还原浸出与常规硫粉湿法还原浸出工艺相比,反应时间大幅缩短、浓硫酸用量大幅减少,有效地实现了锰、铅分离,且采用硫粉作为还原剂,成本低廉,还原过程无二次污染。研究结果对电解锰阳极渣的资源化利用具有一定的参考价值。In order to explore green and efficient reduction leaching system,manganese was leached from electrolytic manganese anode slag with sulfur as reductant after curing with concentrated sulfuric acid.After the leaching solution is concentrated and purification,the manganese tetroxide is prepared by the method of manganese precipitation with carbonate and roasting.The results showed that the leaching rate of manganese can reach 96.15%under the curing temperature of 125℃,acid-solid ratio of 0.8 mL/g,curing time of 20 h,mass ratio of sulfur to manganese anode slag of 0.18 g/g,and the leaching time of 1 min.The manganese tetroxide particles prepared by using the impurity-removed leaching solution are relatively uniform and loose porous structure,and the manganese content reaches 71.81%.Compared with the conventional sulfur reduction leaching process,the leaching time is greatly shortened and the amount of concentrated sulfuric acid is greatly reduced,which effectively realizes the separation of manganese and lead,and when the sulfur is used as the reducing agent,the reduction process has no secondary pollution and low cost.The research has certain reference value for the resource utilization of electrolytic manganese anode slag.

关 键 词：电解锰阳极渣 硫粉 熟化 还原浸出 四氧化三锰 

分 类 号：TQ137.12[化学工程—无机化工]