复杂镍浸出液萃取净化的研究  

Purification of Nickel Leaching Solution by Solvent Extraction

作　　者：赵中伟[1] 黄少波[1] 霍广生[1] 张刚[1] 曹才放[1] 

机构地区：[1]中南大学冶金科学与工程学院,稀有金属冶金与材料制备湖南省重点实验室,长沙410083

出　　处：《有色金属（冶炼部分）》2010年第1期5-8,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家高技术研究发展计划项目(863)(2007AA06Z129);国家高技术研究发展计划项目(863)(2006AA06Z122);新世纪优秀人才支持计划资助项目(NCET-05-0692)

摘　　要：以D2EHPA为萃取剂,从钼镍矿的复杂镍浸出液中萃取分离锌、铜。考察了萃取平衡时间、D2EHPA体积浓度、相比(O/A)、料液pH对萃取分离锌、铜效果的影响,确定了D2EHPA萃取锌、铜的最佳条件。室温下萃取除杂的最佳工艺条件为:萃取平衡时间3 min,D2EHPA的体积浓度20%,相比1∶1,料液pH=2.0,一级萃取率锌为89.5%,铜为11.0%。负载有机相经1 mol/L的H2SO4反萃,锌、铜和镍均可完全反萃。经三级逆流萃取可将料液中锌降低到0.01 g/L,萃取率达98.9%。Impurities were separated from nickel leaching solution by solvent extraction. The effects of pH values of aqueous solution, the phase ratio （O/A）, volume concentration of D2EHPA and equilibrium time on the zinc and copper extraction ratio were investigated. The optimum conditions were determined： vol- ume concentration of D2EHPA 20%, the phase ratio （O/A） 1 ： 1, pH value of the aqueous solution 2.0, equilibrium time 3 min. Under the optimal conditions, zinc and copper extraction ratios at the first stage reached 89.50/40 and 11.0% respectively. The complete stripping of zinc and copper from the zinc, copper- loaded D2EHPA-sulfonated kerosene organic phase can be achieved by 1.0 mol/L H2SO4 through one stage. After the three stage countercurrent extraction, zinc concentration can be reduced to 0.01 g/L, and extraction ratio is 98. 9%.

关 键 词：镍钼矿 萃取 D2EHPA 除杂 

分 类 号：TF816[冶金工程—有色金属冶金]