Electrochemical separation and extraction of cobalt and tungsten from cemented scrap

被引：19

作者：

Zhang, A. Liwen ^{[1
]}

Nie, B. Zuoren ^{[1
]}

Xi, C. Xiaoli ^{[1
]}

Ma, D. Liwen ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, 100 Pingleyuan, Beijing 100124, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2018年 / 195卷

基金：

国家重点研发计划; 中国国家自然科学基金; 北京市自然科学基金;

关键词：

Separation; Cemented scrap; Tungsten; Cobalt; MOLTEN-SALT; WC SCRAP; CARBIDE SCRAP; RESOURCES; BEHAVIOR; ZINC; DISSOLUTION; REDUCTION; RECOVERY; METAL;

D O I：

10.1016/j.seppur.2017.12.022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Molten salt electrolysis was utilized for the separation of cobalt and tungsten from cemented carbide scrap in the NaCl-KCl melt at 1023 K (750 degrees C). The WC -15 Co sacrificial anode was dissolved to cobalt and tungsten ions and consequently discharged on the cathode to deposit cobalt and tungsten during electrolysis. The carbon remained at the anode with a porous structure. The oxidation potential of the cobalt and the tungsten carbide in the cemented carbide were analyzed through the electrochemical method. The effects of anode potential, current and duration on the dissolution were investigated. The anodic dissolution processes under different conditions were characterized through SEM and EDX. Subsequently to the two-step electrolysis, the cobalt powders of 100 nm in diameter, the tungsten powders of below 200 nm in diameter and a porous structure of carbon were obtained.

引用

页码：244 / 252

页数：9

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