锰矿直接制备高纯碳酸锰工艺研究

采用广西某地低品位碳酸锰矿为原料 ,以硫酸浸出、浸出液除杂、碳化结晶工艺制备得到高纯碳酸锰产品。试验发现 ,碳酸锰产品的粒度大小严重影响产品的质量。产品中杂质存在着极限值 ,并与晶体粒度有关。晶体粒度增大 ,杂质含量增加 ,因此 ,晶体的粒度控制是整个工艺的关键。试验结果显示 ,通过调整结晶工艺条件可有效降低产品粒度 ,从而降低产品杂质含量

Preparation of High-purity Manganese Carbonate from Manganese Ore

The high purity manganese carbonate is prepared by the process of leaching,removing impurities and crystallizing from Guangxi′s low grade manganese ore.Experiment results show that the powder size of manganese carbonate will influence product quality.There exist limit value of impurity content in the product and the impurity content increase with the powder size increasing.Therefore,controlling the powder size is the key factor of the technique.Test results express that the powder size can be decreased by controlling crystallizing condition,and then the impurity content can be decreased.