Study on the Removal of Iron of Low-grade Pyrolusite Leaching Solution

作者：YANG Wei-jun; QU Xiao-juan; ZHU Li-jun

来源：湖南大学学报(自然科学版), 2014, (1).

• manganese ore
• leaching
• iron deposits
• goethite method
• ammonium j arosite method

Manganese sulfate solution with high iron content was obtained by leaching a kind of low-grade pyrolusite from Hunan Province with pyrites and concentrated sulfuric acid,or,in the two-ore-acid-leaching 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 j arosite process method,ammonium j arosite-goethite union method. The results showed that ammonium j arosite-goethite union method was most suitable for the removal of i-ron from the solution.The iron removal rate reached 99.96% at 90 ℃ in a 1 hour reaction.Meanwhile, the manganese loss rate was lower,the slag volume was smaller and the filtration was easier.The deep-re-moving of iron has laid a foundation for the preparation of high purified manganese sulfate solution.

• 出版日期2014
• 单位湖南大学