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《Journal of Hunan University(Natural Sciences)》 2014-01
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Study on the Removal of Iron of Low-grade Pyrolusite Leaching Solution

YANG Wei-jun;QU Xiao-juan;ZHU Li-jun;College of Chemistry and Chemical Engineering,Hunan Univ;  
Manganese sulfate solution with high iron content was obtained by leaching a kind of lowgrade pyrolusite from Hunan Province with pyrites and concentrated sulfuric acid,or,in the two-ore-acidleaching method.The methods of iron deep-removing from the manganese sulfate solution were studied. Various iron-removing methods were compared,such as neutralizing hydrolysis method,partial hydrolysis of goethite method,and ammonium jarosite process method,ammonium jarosite-goethite union method. The results showed that ammonium jarosite-goethite union method was most suitable for the removal of iron from the solution.The iron removal rate reached 99.96% at 90 ℃in a 1hour reaction.Meanwhile, the manganese loss rate was lower,the slag volume was smaller and the filtration was easier.The deep-removing of iron has laid a foundation for the preparation of high purified manganese sulfate solution.
【Fund】: 中央高校基本科研业务费专项基金资助项目(53110704012)
【CateGory Index】: TF792
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