高磷高铁氧化锰矿硫酸化焙烧与水浸制备锰电解液

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270 min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.

Preparation of Mn-containing Electrolysis Solution from the Manganese Oxide Ore with High Content Phosphorus and Iron by Sulfation Roasting and Aqueous Leaching

In order to overcome the shortcomings of traditional methods, the method of sulfation roasting and leaching of manganese oxide ore was used to prepare manganese-containing electrolysis solution, wherein the ore and pyrite were roasted at high temperature, making the tetravalent manganese become water-soluble divalent manganese. Meanwhile, the sulfation process was completed in the roasting process, so the roasted clinker could be directly leached by water, abandoning the traditional process of acid leaching. Through the experiments, the molar ratio of S to Mn at 3, roasting temperature 600℃, and roasting time 270 min were set as the optimum conditions. The leaching rate of Mn reached 85.6% under the conditions, indicating that the present method is entirely feasible.