Electrochemical reduction mechanism of Zn^(2+)in molten NaCl-KCl eutectic

作     者：Xiao-bin WU Zeng-li ZHU Hui KONG You-qi FAN Si-wei CHENG Zhong-sheng HUA 吴孝彬;朱曾丽;孔辉;樊友奇;程思维;华中胜

作者机构：School of Metallurgical EngineeringAnhui University of TechnologyMa’anshan 243032China Anhui Provincial Key Laboratory of Metallurgical Engineering&Resources RecyclingAnhui University of TechnologyMa’anshan 243002China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2022年第32卷第9期

页      面：3088-3098页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：the financial support from the Natural Science Foundation of Anhui Province, China (No. 2008085ME170) the Anhui Special Support Plan, China (No. T000609) the National Natural Science Foundation of China (No. 51204002 

主　　题：electrochemical reduction zinc ions electrochemical behavior molten NaCl-KCl eutectic metallurgical dusts 

摘      要：A process comprising selective chlorination and molten salt electrolysis was proposed to develop an efficient and environmental-friendly technology for zinc recovery from metallurgical *** theoretical feasibility of this technology was firstly estimated based on thermodynamic ***,the electrochemical behavior of Zn^(2+)on tungsten electrode was investigated in molten NaCl-KCl eutectic at 973 K by many electrochemical transient *** results showed that the reduction of Zn^(2+)on tungsten electrode was found to be a one-step process exchanging two electrons with the initial reduction potential of-0.74 V(vs Ag/AgCl),and the electrode process was considered as quasi-reversible and controlled by *** diffusion coefficient of Zn^(2+)ions in the melts was determined in the order of 10^(-5)cm^(2)/***,the electrolytic preparation of zinc was carried out by potentiostatic electrolysis in molten NaCl-KCl-ZnCl_(2)eutectic at-1.6 V(vs Ag/AgCl).Spheroidic granular metal with silver-white luster was attained after electrolysis for 9.5 h,and identified as pure *** present study confirms that it is practically feasible to extract pure zinc metal by direct electrolysis of ZnCl_(2)in molten NaCl-KCl eutectic,and provides a valuable theoretical reference for the efficient recovery of zinc from metallurgical dusts.