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为克服传统工艺的缺点,采用氧化锰矿硫酸化焙烧水浸方法制备电解锰电解液,将氧化锰矿与硫铁矿混合高温焙烧,使四价锰还原成水溶性的二价锰,并在焙烧过程中完成硫酸化过程,生成水溶性MnSO4,而其他杂质元素生成难溶性的氧化物用水直接浸出,避免其进入电解液,不用传统工艺中的酸浸,有利于环保.通过实验得出在S/Mn摩尔比为3、焙烧温度600℃、焙烧时间270min的最优工艺条件下,Mn的综合浸出率可达85.6%.表明本工艺路线是完全可行的.
In order to overcome the shortcomings of the traditional process, the manganese oxide electrolyte was prepared by the sulfation roasting and immersion method of manganese oxide ore. The manganese oxide ore and the pyrite were roasted at high temperature to reduce the tetravalent manganese into water-soluble manganese dioxide. During the roasting process In the completion of the sulfation process to generate water-soluble MnSO4, and other impurities to generate insoluble oxides of water directly leaching, to avoid its access to the electrolyte, without the acid leaching in the traditional process is conducive to environmental protection obtained by experiment in the S / Mn molar ratio of 3, calcination temperature of 600 ℃, calcination time of 270min under the optimum conditions, the comprehensive leaching rate of Mn up to 85.6% .This shows that the process route is entirely feasible.