TBP对有机胺协萃体系萃镍性能的影响  

Effect of TBP on Nickel Extraction in Organic Amine Synergistic Extraction System

作　　者：李超[1] 胡慧萍[1] 李吉源 陈启元[1] 刘士军[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《有色金属（冶炼部分）》2015年第10期1-4,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点基础研究发展计划(973计划)项目(2014CB643401)

摘　　要：选取一种自制有机胺和协萃剂的复配萃取体系从红土镍矿模拟硫酸浸出液中回收镍,考察了各组分比例、改性剂TBP加入量、萃取剂总浓度、萃取时间、萃取温度等对镍的萃取率、除杂率、萃取分相时间及反萃分相时间的影响。结果表明,TBP的加入能极大缩短反萃分相时间,同时对除杂率与萃取分相时间没有太大影响,镍饱和萃取容量略有降低。当萃取剂各组分摩尔浓度为有机胺∶协萃剂∶改性剂=0.9mol/L∶0.45mol/L∶0.9mol/L时,镍饱和萃取容量达6.9g/L。萃取温度的升高有利于缩短萃取分相时间,但是镍的萃取率略有下降。在萃取相比O/A=1/2、30℃萃取20min时,镍的5级逆流萃取率可达98%以上。One self-made organic amine synergistic extraction system was used to extract nickel from simulated laterite leaching solution.The effects of proportion of components,molar concentration of TBP,extractant concentration,extraction time,and extraction temperature on nickel extraction rate,removal ratio of impurities,and phase separation time of extraction and striping were investigated.The results show that addition of TBP can greatly shorten stripping phase separation time with extraction capacity of nickel dropping slightly and has little impact on removal ratio of impurities and extraction phase separation time.The extraction capacity of nickel is 6.9g/L with molar ratio of amine∶synergistic reagent∶TBP=0.9 mol/L ∶0.45 mol/L ∶0.9 mol/L.Increasing extraction temperature facilitates shortening of extraction phase separation time but causes a slight drop of extraction ratio of nickel.Five counter-current extraction ratio of nickel is 98% above with O/A=1/2at 30 ℃for 20 min.

关 键 词：镍 有机胺 TBP 协萃剂 改性剂 

分 类 号：TF804.2[冶金工程—有色金属冶金]