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Author:

Zhang, Qinghua (Zhang, Qinghua.) | Xi, Xiaoli (Xi, Xiaoli.) (Scholars:席晓丽) | Nie, Zuoren (Nie, Zuoren.) (Scholars:聂祚仁) | Zhang, Liwen (Zhang, Liwen.) | Ma, Liwen (Ma, Liwen.)

Indexed by:

EI Scopus SCIE

Abstract:

In this study, WC and WC 6 wt% Co scraps were utilized in molten salt state as two consumable anodes to circulate tungsten and cobalt during electrolysis. Because of poor dissolution of cemented carbide scrap in NaCl-KCl salt, tungsten trioxide was added to NaCl-KCl salt as active substance to improve the dissolution of the anode. Therefore, dissolutions of WC and WC-6 wt% Co anodes were studied at different tungsten trioxide contents. It was shown that addition of tungsten trioxide significantly increased dissolution of the anode. The addition of tungsten trioxide drastically reduced charge transfer impedance and accelerated the dissolution. The electrolyte resistance also reduced slightly. The electrolysis of WC anode was investigated at optimal tungsten trioxide content. Tungsten with single phase was obtained at current density of 0.1 A.cm(-2) for 8 h. The electrolysis of WC-6 wt% Co anode was also explored using same tungsten trioxide content. The data suggested that electrolysis time and current density greatly influenced the composition of cathode product. The preliminary conditions were determined for separation of tungsten and cobalt. Overall, the electrochemical preparations of cobalt and tungsten metal were achieved by two-step electrolysis processes.

Keyword:

Cemented carbide scrap Molten salt Tungsten trioxide Electrochemical dissolution

Author Community:

  • [ 1 ] [Zhang, Qinghua]Beijing Univ Technol, Educ Minist China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 2 ] [Xi, Xiaoli]Beijing Univ Technol, Educ Minist China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 3 ] [Nie, Zuoren]Beijing Univ Technol, Educ Minist China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, Liwen]Beijing Univ Technol, Educ Minist China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 5 ] [Xi, Xiaoli]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100129, Peoples R China
  • [ 6 ] [Nie, Zuoren]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100129, Peoples R China
  • [ 7 ] [Ma, Liwen]Beijing Univ Technol, Natl Engn Lab Ind Big Data Applicat Technol, Beijing 100129, Peoples R China

Reprint Author's Address:

  • 席晓丽

    [Xi, Xiaoli]Beijing Univ Technol, Educ Minist China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China

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Source :

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS

ISSN: 0263-4368

Year: 2019

Volume: 79

Page: 145-153

3 . 6 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:211

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 27

SCOPUS Cited Count: 30

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 6

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