Enhanced preparation of dendritic metallic vanadium in recyclable NaCl-KCl-VCl_(2) molten salt by V_(2)CO electrolysis  

作　　者：Jia-Liang An Ming-Yong Wang Yong-Zheng Jia Jin-Tao Zhang Bao-Yan Feng Shu-Qiang Jiao 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China [2]College of Material Science and Engineering,Hebei Province Laboratory of Inorganic Nonmetallic Materials,North China University of Science and Technology,Tangshan 063210,China

出　　处：《Rare Metals》2024年第8期3961-3973,共13页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.51725401)。

摘　　要：A promising method for the preparation of pure metallic vanadium via V_(2)CO anode electrolysis was proposed and confirmed.The simple and controllable synthesis of a molten chloride salt containing VCl_(2) by an insitu reaction between VCl_(3) and metallic vanadium was verified through thermodynamic analysis and experiments.NaCl-KCl-VCl_(2) molten salt exhibited excellent recycling performance and could be repetitively used to prepare metallic vanadium by V_(2)CO electrolysis.The V^(2+) ions remained in the molten salt after electrolysis.The electrolysis conditions,such as the cathode diameter,current density,V^(2+) ion concentration,and temperature,were optimised to maximise the current efficiency.Electrolysis was also simulated to reveal the regulatory mechanism.The highest current efficiency was 85%.The purity of metallic vanadium was up to 99.8%.In this study,an easy and efficient preparation of pure metallic vanadium was achieved.

关 键 词：V_(2)CO Metallic vanadium Current efficiency Molten salt electrolysis 

分 类 号：TF841.3[冶金工程—有色金属冶金]