摘要
针对酸性溶液体系中钒、镓难以高效分离回收的问题,研究了V(Ⅴ)-Ga(Ⅲ)-H_(2)O体系中钒、镓离子的物理化学性质差异,并利用冶金热力学计算公式模拟计算出了溶液浓度优势区域与组分优势区域,同时结合碱滴定试验和拉曼检测结果确定了钒、镓分离的适宜lg[C]T-pH范围。结果表明:优势pH范围在2~3之间,在此区间内,钒离子将产生摩尔分数>90%的钒同多酸根大核阴离子,同时镓主要以小核阳离子形式存在,加大了酸性溶液中钒、镓的化学状态差异性,同时有效避免了氢氧化镓的大核沉淀的形成,有利于富集溶液中钒、镓的分离回收。
To address the issue of the efficient separation and recovery of vanadium and gallium from acidic solution system,the physicochemical differences between V(Ⅴ)and Ga(Ⅲ)in the V(Ⅴ)-Ga(Ⅲ)-H_(2)O system were systematically examined.Through metallurgical thermodynamic simulations,concentration predominance diagrams and species predominance diagrams were generated.Combined with alkali titration experiments and Raman spectroscopy analysis,the optimal lg[C]T-pH range for vanadium-gallium separation was determined.The results indicate that the ideal pH range is between 2 and 3.In the range,vanadium ions will form large-nucleus anions of vanadium polyoxometalates with a molar fraction of more than 90%,while gallium mainly exists in the form of small-nucleus cations,increasing the chemical state difference between vanadium and gallium in acidic solution system and effectively avoiding the formation of large-nucleus gallium hydroxide precipitates,which is conducive to the separation and recovery of vanadium and gallium in the enriched solution system.
作者
聂子杰
张伟光
李义兵
陈日凡
曹雪娇
陈杨
黄宇坤
NIE Zijie;ZHANG Weiguang;LI Yibing;CHEN Rifan;CAO Xuejiao;CHEN Yang;HUANG Yukun(College of Materials Science and Engineering,Guilin University of Technology Guilin 541004,China;Key Laboratory of New Technology for Non Ferrous Metals and Materials Processing,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources,Guilin University of Technology Guilin 541004,China;Laibin Huaxi Smelting Co.,Ltd.,Laibin 546100,China;Guangxi Huaxi Group Co.,Ltd.,Liuzhou 545000,China)
出处
《湿法冶金》
北大核心
2025年第3期334-341,共8页
Hydrometallurgy of China
基金
国家自然科学基金资助项目(52204358、52464045)
广西科技计划项目(2023GXNSFBA026140)
广西科技计划项目(重大专项,桂科AA23023033)
广西创新驱动发展专项资金项目(AA22068080)
安徽省低碳冶金与固废资源化重点实验室(安徽工业大学)开放基金项目(SKF24-01)
中国博士后面上基金项目(2024MD763942)。
关键词
钒同多酸根
大核阴离子
区域优势图
钒
镓
分离
polynuclear vanadate anions
large-nucleus anions
predominance diagrams
vanadium
gallium
separation
