摘要
利用钛白副产物硫酸亚铁作为还原剂，对软锰矿进行浸出还原生产硫酸锰的系统性试验研究。通过分析软锰矿粒度，搅拌速率，浸出时间，液固比，硫化亚铁与二氧化锰质量比，pH 值和浸出温度对软锰矿还原率的影响，研究得出软锰矿浸出的优化条件。在该条件下，可获得含99．29％一水硫酸锰的硫酸锰粉末。试验数据的动力学分析显示，在20～80℃的反应温度范围内，浸出过程符合化学反应模型，该浸出过程的计算活化能为59．6 kJ／mol。
Abstract
Manganese leaching and recovery from pyrolusite ore were investigated by using ferrous sulfate from the byproduct of titanium dioxide as a reducing agent.The optimal leaching conditions were determined by analyzing the effects of particle size,including agitation rate,leaching time,liquid /solid mass ratio,ferrous sulfate /manganese dioxide mass ratio,pH,and leaching temperature on the recovery rate of manganese.Under optimal conditions,powder obtained contains 99.29% MnSO4·H2 O and small amounts of impurities.Kinetic analysis of the experimental data illustrated that the leaching process was fitted by a chemical reaction model in a temperature range of 20 ~80℃.The calculated activation energy for the reaction is 59.6 kJ/mol.
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维普
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