Removal of Iron During Copper Sulfate Production from Bioleaching Reextraction Solution
LIN Jian-jun,HE Ning,LI Qing-biao,DENG Xu,LU Ying-hua,HONG Jin-qing,YIN Tao-feng(Department of Chemical and Biochemical Engineering,Xiamen University,Fujian Xiamen 361005, China)
(Department of Chemical and Biochemical Engineering,Xiamen University,Fujian Xiamen 361005, China
Abstract Iron removal is crucial to the process of feed-additive copper sulfate pentahydrate production from bioleaching reextraction solution.In this paper,three iron removal methods were examined.A series of experiments were conducted in different conditions and the results indicated that when iron was removed by precipitating in the form of ammonium jarosite(95 ℃,pH=1.6),the iron removal efficiency was 91.2%,while by precipitating in the form of ferric hydroxide(70 ℃,pH=3.8),the iron removal efficiency was 98.1%.However,by these two methods,the use of oxidant and neutralization reagents introduced unwanted NH~+_4,Na~+,Ca~(2+)into copper sulfate solution.Crystallizating copper sulfate from reextraction solution,a simple process,could remove iron effectively without adding any additives and the iron removal efficiency could reach 98.5% under the condition of 60 ℃ and 6 h,and the quality of copper sulfate met national standards of feed additive.
LIN Jian-jun,HE Ning,LI Qing-biao,DENG Xu,LU Ying-hua,HONG Jin-qing,YIN Tao-feng.Removal of Iron During Copper Sulfate Production from Bioleaching Reextraction Solution[J] Chemcial Industry and Engineering, 2005,V22(2): 96-99
2005, Vol. 22 
