D2EHPA萃取法从钒页岩高氯浸出液中制备钒电解液  

Preparation of vanadium electrolyte from vanadium shale leaching solution with high concentration chloride using D2EHPA

作　　者：刘红[1,2,3,4] 张一敏[1,2,3,4] 刘涛[1,2,3,4] 黄晶[1,2,3,4] 陈黎明[1,2,3,4] 胡幼文[1,2,3,4] Hong LIU;Yi-min ZHANG;Tao LIU;Jing HUANG;Li-ming CHEN;You-wen HU(College of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,武汉430081 [2]武汉科技大学国家环境保护矿冶资源利用与污染控制重点实验室,武汉430081 [3]武汉科技大学钒资源高效利用湖北省协同创新中心,武汉430081 [4]武汉科技大学湖北省页岩钒资源高效清洁利用工程技术研究中心,武汉430081

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第5期1594-1608,共15页中国有色金属学报（英文版）

基　　金：the National Key Research and Development Program of China(No.2020YFC1909700);the National Natural Science Foundation of China(Nos.51974207,51774215).

摘　　要：提出一种从钒页岩中回收有价元素并制备钒电解液的工艺。结果表明,在料液pH值为2.6、萃取剂D2EHPA浓度为20%、相比(O/A)为1:1、萃取时间为8 min、H2SO4浓度为4 mol/L及反萃时间为30 min的条件下,钒萃取率为99.3%,反萃率为99.8%。对制备的电解液组成及电化学性能进行详细研究。溶液化学和红外光谱分析表明,浸出液中氯离子可以与钒离子络合,促进钒的萃取。采用本研究提出的工艺能实现钒页岩的综合利用,并避免钒电解液制备过程中有害物质对环境的潜在污染。A process for preparing vanadium electrolyte accompanied by the recovery of valuable elements from vanadium shale was proposed.The results showed that under the optimal extraction conditions of the feed solution at a pH of 2.6,D2EHPA concentration of 20%,phase ratio(O/A)of 1:1,extraction time of 8 min,H2SO4 concentration of 4 mol/L,and stripping time of 30 min,the vanadium extraction rate was 99.3%and the vanadium stripping rate was 99.8%.The composition and electrochemical performance of the electrolyte were studied in detail.The solution chemical and FTIR analysis showed that chloride ions in the leaching solution formed complexes with vanadium ions,promoting vanadium extraction.The proposed method in this study realized the comprehensive utilization of vanadium shale and prevented toxic environmental pollution in the preparation process of vanadium electrolyte.

关 键 词：钒页岩 溶剂萃取 钒电解液 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动] TF841.3[冶金工程—有色金属冶金]