藤茶提取物还原浸出电解锰阳极泥中的锰

Leaching of Manganese from Electrolytic Manganese Anode Slime with Vine Tea Extract as Reductant

锰阳极泥是生产电解金属锰时在阳极室产生的副产物,电解锰企业平均每年会产生约10万吨锰阳极泥,其中锰含量在40%~50%,是一种二次锰资源。针对锰阳极泥高效资源分离回收技术难题,以贵州铜仁某电解锰企业产生的锰阳极泥为原料,在硫酸体系中采用藤茶提取物二氢杨梅素为还原剂浸出电解锰阳极泥中的元素锰,通过单因素试验考察了二氢杨梅素用量、液固比、硫酸浓度、浸出时间和物料粒度对锰浸出率的影响。结果表明,在二氢杨梅素与锰阳极泥质量比为0.09 g g、硫酸浓度2 mol L、液固比8、粒度-0.15 mm的条件下浸出120 min,锰的浸出率为96%。本研究在保证电解锰阳极泥中锰高效浸出,且浸出条件相对温和的同时,锰阳极泥中的铅得到有效富集,实现了锰和铅的良好分离,为电解锰阳极泥的资源化利用提供技术参考。

Manganese anode slime is a by-product produced in anode chamber during the production of electrolytic manganese metal.About 100 kt of manganese anode slime with manganese content of 40%—50%will be produced from electrolytic manganese enterprises in China every year.It is a rare secondary manganese resource.Address to the technical problems of efficient resource separation and recovery of manganese anode slime,manganese anode slime from Guizhou Tongren Electrolytic Manganese Enterprise was used as raw material,and the element manganese in electrolytic manganese anode slime was leached in sulfuric acid system with dihydromyricetin,an extract from vine tea,as the reducing agent.Effects of dihydromyricetin dosage,L S,sulfuric acid concentration,leaching time,and particle size on manganese leaching rate were investigated.The results show that manganese leaching is 96%under the conditions including mass ratio of dihydromyricetin to manganese anode slime of 0.09 g g,sulfuric acid concentration of 2 mol L,L S=8,particle size of-0.15 mm,and leaching time of 120 min.This study can effectively separate manganese and lead from electrolytic manganese anode slime while ensuring the efficient leaching of manganese,which provides technical reference for the resource utilization of solid waste of electrolytic manganese anode slime.