摘要
黄钠铁矾渣用浓氨水分解,浸出液经盐酸处理后,用LIX984萃取剂和磷酸二异辛酯(P204)分别萃取铜和镍。探讨了原料液中pH值、有机相中萃取剂体积分数、相比(O/A)、铜、镍离子浓度、反萃取相比(O/A)等萃取条件对铜镍萃取率的影响。结果表明:LIX984萃取剂体积分数为20%、pH值为2.5、相比(O/A)为1∶1、Cu^(2+)和Ni^(2+)浓度均约为5 g/L,Cu^(2+)的萃取率约为92%,反萃取相比(O/A)为1∶1,铜的反萃取率高达99%,调节萃余液中pH值约为5.5时,P204对镍的萃取率超过98%,镍的反萃取率约为91%。LIX984和P204萃取剂对铜和镍的萃取效果显著,能够选择性地萃取回收黄钠铁矾渣浸出液中的铜和镍。
sodium jarosite is resolved by stronger ammonia water, the copper and nickel should be extracted by LIX984 extrac- tion agent and Bis phosphate （ P204 ） separately after the leaching agent treated by hydrochloric acid. It is discussed that the effect of the ex- traction conditions, such as pH value in feed solution, the volume fraction, phase ratio （O/A）, copper, nickel ionic concentration, extrac- tion agent reextraction phase ratio （O/A） in organic phase on copper, nickel extraction rate. The results show ： the volume fraction of LIX984 extraction agent is 20%, the pH value is 2. 5, the phase ratio （O/A） is 1 ： 1, the average concentration of Cu2 ~ and Ni2 ~ is around 5g. The extraction rate of L -z, Cu2. is about 92%, the re - extraction phase ratio （O/A） is 1 ： I, the re-extraction rate of copper reach to 99%, when adjust the pH value in the extraction raffinate to 5.5, the extraction rate of nickel by P~ is over 98%, the re-extraction rate of nickel is about 91%. The extraction effect of copper and nickel by LIX984 and P204 extraction agent is significantly, which can extract copper and nickel in the sodium jarosite leaching agent selectively.
出处
《云南冶金》
2017年第3期27-30,46,共5页
Yunnan Metallurgy
基金
2015年四川省科技支撑计划项目(2015GZ0249)
