Manganese-rich phase with low impurity content was prepared with manganese sulfate crude solution by precipitation.A single-factor experiment was carried out to explore effects of reaction time,reaction temperature,pH value and feeding speed of precipitating agent on precipitation efficiency,and then the content of impurity in the finally prepared manganese-rich phase was also analyzed.After the leaching solution with Mn2+in mass concentration of 38 g/L,and pH of 8.0 was precipitated at 60℃for 4 h,with R as precipitating agent fed at a speed of 0.5 L/h,the conversion rate of Mn2+was 94.3%.The ICP and EDS analyses showed that there were low content of impurity ions(K,Na,Ca,Mg)in the precipitate of manganese-rich phase.
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