Experimental Study on Iron Removal of Zinc Sulfate Solution by Goethite Method AITranslate

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Chinese Library Classification Number:TF813[冶金工程—有色金属冶金]

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The gothite method was used to remove iron from the zinc sulfate neutralized solution in the hot acid leaching-iron removal system by jarosite method of a smelter and self-made zinc calcine leaching solution.The effects of raw material type,reduction time,initial acid concentration of solution,type of neutralizing agent for iron removal and gothite residue washing method on the reduction and iron removal process were analyzed.The results show that the combination of hot acid leaching and iron removal process by goethite method is feasible.For both self-made zinc calcine leaching solution and neutralized solution from zinc smelting workshop,the optimal reduction reaction time is 4 h,increasing the initial acid concentration of solution is beneficial to the reduction effect,and the iron precipitation effect of zinc calcine with particle size of-74μm is the best for iron removal neutralizer.After acid washing and water washing,the gothite residue produced from zinc calcine leaching solution after iron removal has a zinc mass fraction of 3.59%,an iron mass fraction as high as 39.62%,and a sulfur mass fraction of 4.91%.The experimental results of using neutralized solution from zinc smelting workshop for iron removal are not satisfactory,possibly due to the complex environment of the raw material system and the presence of a large number of cations,which has adverse influence on the reduction effect and the production of gothite residue.