【摘 要】
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Separation of high level of iron from acid leaching liquor is a difficult task,especially in the acid leaching process of laterite ore.In this paper the rem
【机 构】
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Northeastern University, School of Materials & Metallurgy, Shenyang, 110004, P.R.China
【出 处】
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第五届国际湿法冶金学术会议(5th International Conference on Hydrometallurg
论文部分内容阅读
Separation of high level of iron from acid leaching liquor is a difficult task,especially in the acid leaching process of laterite ore.In this paper the removing of iron by goethite precipitate method from the leach liquor of reduced laterites are reported.The goethite precipicate process use air as oxidation agent, that is, EZ method, but it do not need the pre-reduction of ferric iron while the soluble iron in leach liquor is mainly ferrous ion.The effects of pH value on the iron removal speed and the loss of nickel in the residue were investigated.It was found the pH value had remarkable influence on the nickel loss during goethite precipitating.By carefully controlling the pH value less than 2.5 the loss of nickel could be restricted in 5%.The attmpt of recycling the losing nickel in the goethite residue through thin acid washing was failed, which implying part of nickel co-precipitatod with iron in the goethite.
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