Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第23卷    第11期    总第176期    2013年11月

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文章编号:1004-0609(2013)11-3218-07
配合-沉淀体系中铁与钴、镍的分离性能
韩新罡,席晓丽,马立文,聂祚仁,周志理

(北京工业大学 材料科学与工程学院,北京 100124)

摘 要: 研究不同配合-沉淀体系中铁与钴、镍的分离性能。通过热力学理论计算预测碳酸体系、氨水体系和碳酸-氨水体系中溶液金属离子浓度与pH值之间的关系,结合实验确定碳氨体系具有最佳的除铁效果,能保证较小的钴、镍损失,且有利于后续钴、镍的分离。通过条件实验确定碳氨体系最佳除铁工艺条件如下:(CoNi)/Fe3+浓度比为1.5~2.5,氨水浓度为1 mol/L,Na2CO3浓度为0.01 mol/L,pH值为4.0。在(CoNi)/Fe3+浓度比为2.5,其他条件为最佳条件时,除铁率>99%,钴的损失率为11.4%,镍的损失率为10.6%。该方法除铁效果明显、过滤性能良好,具有较好的应用前景。

 

关键词: 配合-沉淀体系;钴;镍;除铁

Separation properties of ion to cobalt and nickel in complexation-precipitation system
HAN Xin-gang, XI Xiao-li, MA Li-wen, NIE Zuo-ren, ZHOU Zhi-li

College of Material Science and Engineering, Beijing University of Technology, Beijing 100124, China

Abstract:The separation properties of ion to cobalt and nickel in complexation-precipitation system were studied. The relationship between metal ion concentration and pH value in the complexation-precipitation systems of carbonate system, ammonia system and carbonate-ammonia system was simulated by the thermodynamic calculation. Combined with the experiments, the carbonate-ammonia system was considered as the best ion-removal system, which can guarantee a high iron removal efficiency, small amount of cobalt, nickel lost, and is conducive to the subsequent separation of cobalt and nickel. The results show that the optimal ion-removal conditions in carbonate-ammonia system are determined as follows: (CoNi)/ Fe3+ concentration ratio of 1.5-2.5; ammonia concentration of 1 mol/L; Na2CO3 concentration of 0.01 mol/L; pH value of 4.0. Under this condition of (CoNi)/ Fe3+=2.5, the ion-removal rate is over 99%, the cobalt loss rate is about 11.4%, and the nickel loss rate is 10.6%. This ion-removal method has the advantages of high iron removal efficiency, favorable filtration performance and good application prospect.

 

Key words: complexation-precipitation system; cobalt; nickel; ion removal

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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