Abstract
Trace amounts of iron impurity in manganese sulfate solution will seriously affect the quality of manganese products if it is not purified. In this study, we utilized mechanically activated CaCO3 to remove iron from manganese sulfate solution by co-grinding CaCO3 with manganese sulfate solution in a wet stirred ball mill. Effects of rotation speed, milling time, ball/liquid volume ratio, and CaCO3/Fe2+ molar ratio on the iron removal were investigated. The results showed that the iron in the manganese sulfate solutions was efficiently removed with an iron removal rate of approximately 100% under the optimum conditions. Mechanical activation clearly increased the reactivity of CaCO3. This study would provide an alternative method for removing iron from manganese solution.
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