用电解锰阳极泥和含SO_2工业尾气制备硫酸锰

以电解锰阳极泥与电解锌生产中产生的含SO_2尾气为原料,经过反应、浸出、浸出液两次净化和浓缩结晶制备硫酸锰,考察了反应时间、含SO_2尾气的流量及反应温度对Mn~(4+)转化率的影响.实验结果表明:在反应时间45 min、反应温度20～30 ℃、含SO_2尾气流量16 L/min的条件下,Mn~(4+)转化率达90%以上;尾气中SO_2利用率随尾气流量增加而降低;所得MnSO_4·H_2O产品质量达到GB1622-86<工业级硫酸锰标准>.

Preparation of Manganese Sulfate Using Anode Slurry from Electrolytic Manganese Production and Industrial Exhaust Gas Containing SO_2

Using anode slurry from electrolytic manganese production and exhaust gas containing SO_2 from electrolytic zinc production as raw materials, manganese sulfate was prepared by reaction, leaching, twice purification of leaching solution and crystallization. The effects of reaction time, gas flow and reaction temperature on the Mn~(4+) conversion rate were studied. The experimental results show that: Under the conditions of reaction time 45 min, reaction temperature 20-30 ℃ and gas flow 16 L/min, Mn~(4+) conversion rate can reach over 90%; The utilization efficiency of SO_2 in the exhaust gas will decrease with the increase of gas flow; The quality of the product MnSO_4·H_2O can meet the standard of GB1622-86 for industrial product.