P507萃取分离硫酸溶液中钒和铁的动力学研究  

Study on the Kinetics of Extracting Vanadium and Iron from Sulfuric Acid Solution with P507

作　　者：李望 王林 朱晓波 刘月 LI Wang;WANG Lin;ZHU Xiao-bo;LIU Yue(School of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学化学化工学院,河南焦作454000

出　　处：《稀有金属与硬质合金》2024年第1期1-5,16,共6页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(51804103);河南省重点研发专项(231111321800);河南省自然科学基金项目(232300420078);河南省科技攻关项目(232102321138);河南理工大学杰出青年基金项目(J2022-3)。

摘　　要：钒作为一种稀有金属常与其他金属伴生,含钒矿石的硫酸浸出液中含有大量铁等杂质离子,严重影响钒的后续分离富集。萃取动力学研究是判断萃取过程控制步骤和金属离子萃取分离难易程度的重要方法。本文采用自行设计的圆筒型恒界面池对P507萃取硫酸溶液中V(Ⅳ)和Fe(Ⅱ)的动力学进行了研究。结果表明:水相是萃取过程的扩散阻力区,该萃取过程为化学反应控制类型,随着搅拌速度和萃取温度的升高,V(Ⅳ)和Fe(Ⅱ)的萃取速率均呈上升趋势。萃取V(Ⅳ)的表观活化能为48.68 kJ/mol,萃取Fe(Ⅱ)的表观活化能为135.11 kJ/mol,P507更容易萃取硫酸溶液中V(Ⅳ),有望实现V(Ⅳ)与Fe(Ⅱ)的高效分离。Vanadium is usually associated with other metals as a rare metal.A large number of impurity ions,such as iron,could exist in the sulfuric acid leaching solution of vanadium-bearing ore,which significantly impacts the subsequent separation and enrichment of vanadium.The study of extraction kinetics is an important method for determining the control steps in the extraction process,and the difficulty in extracting metal ions.A self-designed cylindrical constant interface cell was used to study the kinetics of extracting V(Ⅳ)and Fe(Ⅱ)from sulfuric acid solution with P507 as the extractant.The results show that the aqueous phase serves as the diffusion resistance zone of the extraction process,which is a chemical reaction-controlled type.The extraction rates of V(Ⅳ)and Fe(Ⅱ)both demonstrate an upward trend with the increase of stirring speed and extraction temperature.The apparent activation energy of V(Ⅳ)extraction is 48.68 kJ/mol,and that of Fe(Ⅱ)extraction is 135.11 kJ/mol.P507 is more likely to extract V(Ⅳ)from sulfuric acid solution,presenting the potential to achieve the efficient separation of V(Ⅳ)from Fe(Ⅱ).

关 键 词：P507 萃取动力学 硫酸 钒 铁 

分 类 号：TF804.2[冶金工程—有色金属冶金]