Study on the air atmosphere molten salt electrolytic extraction of tungsten and cobalt from cemented carbide scrap
Source abstract
Abstract
In this study, tungsten and cobalt were extracted from cemented carbide scrap by three-stage electrodeposition in Na 2WO 4 molten salt at 900 °C in air atmosphere. The cemented carbide scrap was used as the consumable anode, while the cemented carbide calcined material was used as the electrolytically active substance additive. The composition of the cemented carbide calcined material was determined by thermodynamic calculations combined with XRD phase analysis. The study investigated the promoting effect of air atmosphere on anode oxidation and the effect of varying the molar ratio of tungsten to cobalt in the molten salt on product composition. Cyclic voltammetry was used to analysed the cathodic reduction behaviour of tungsten and cobalt. The nucleation mechanism of tungsten and cobalt was determined to be instantaneous by chronoamperometry. Finally, metallic tungsten and cobalt were successfully separated and extracted by three-stage constant current electrolysis.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Cemented carbide microstructures: a review10.1016/j.ijrmhm.2018.12.004 ↗
2. Materials science of cemented carbides - an overview10.1016/S0261-3069(01)00007-3 ↗
3. Thermal oxidation behavior of WC - Co hard metal machining tool tip scraps10.1016/j.jmatprotec.2012.01.009 ↗
4. Kinetics of WC-Co oxidation accompanied by swelling10.1007/BF00351615 ↗
5. Indentation fracture of WC-Co cermets10.1007/BF00555296 ↗
6. Development of manufacturing technology for direct recycling cemented carbide (WC-Co) tool scraps10.2320/matertrans.M2014213 ↗
7. Mechanical properties of WC-10Co cemented carbides sintered from nanocrystalline spray conversion processed powders10.1016/S0263-4368(01)00057-9 ↗
8. Recycling of tungsten carbide scrap metal: a review of recycling methods and future prospects10.1016/j.mineng.2018.03.036 ↗
9. A comprehensive review on recycling methods for cemented tungsten carbide scraps highlighting the electrochemical techniques10.1016/j.ijrmhm.2020.105251 ↗
10. Reclamation of tungsten from carbide scraps and spent materials10.1007/s10853-018-2876-1 ↗
11. Impurity characterization of zinc-recycled WC-6 wt.% Co cemented carbides10.1016/j.ijrmhm.2014.01.019 ↗
12. Mapping the global flow of tungsten to identify key material efficiency and supply security opportunities10.1016/j.resconrec.2015.07.003 ↗
13. Recovery of cobalt from secondary resources: a comprehensive review10.1080/08827508.2021.1916927 ↗
14. Anodic dissolution behaviour of tungsten carbide scraps in ammoniacal media10.4028/www.scientific.net/AMR.828.11 ↗
15. Electrochemical dissolution of tungsten under pulsed conditions10.1023/A:1018493016444 ↗
16. Study of the electrochemical recovery of cobalt from spent cemented carbide10.1039/D0RA02602F ↗
17. Electrochemical behavior of tungsten ions from WC scrap dissolution in a chloride melt10.1016/j.electacta.2015.10.071 ↗
18. Direct electrochemical preparation of cobalt, tungsten, and tungsten carbide from cemented carbide scrap10.1007/s11663-016-0836-1 ↗
19. Preparation of tungsten nanoparticles from spent tungsten carbide by molten salt electrolysis10.4028/www.scientific.net/MSF.913.961 ↗
20. Electrolytic separation of cobalt and tungsten from cemented carbide scrap and the electrochemical behavior of metal ions10.1016/j.jelechem.2017.04.001 ↗
21. Direct electrolytic separation of tungsten and cobalt from waste cemented carbide and electrochemical behavior of tungsten and cobalt ions in NaF-KF molten salts10.1016/j.jelechem.2018.12.032 ↗
22. Electrochemical preparation of tungsten and cobalt from cemented carbide scrap in NaF-KF molten salts10.1016/j.ijrmhm.2017.09.009 ↗
23. Electrochemical dissolution of tungsten carbide in NaCl-KCl-Na2WO4 molten salt10.1007/s11663-017-1125-3 ↗
24. Electrochemical dissolution of cemented carbide scrap and electrochemical preparation of tungsten and cobalt metals10.1016/j.ijrmhm.2018.12.001 ↗
25. Electrochemical preparation of W coatings in Na2WO4-WO3-ZrO2 molten salt10.1016/j.apsusc.2021.149889 ↗
26. Effect of cathodic current density on the microstructure and performance of W-ZrO2 composites coating prepared in Na2WO4-WO3-ZrO2 molten salt10.1016/j.surfcoat.2022.128497 ↗
27. Electroplating of Co-W and Co-Mo alloys from Na2WO4 ionic melts10.37358/RC.19.3.7023 ↗
28. Electrochemical behavior of diamonds in ionic melts10.1016/0013-4686(94)00354-4 ↗
29. Recovery of tungsten carbides for preparing ultrafine WC-Co composite powder using core-shell structured precursor synthesized by CVD10.1016/j.ijrmhm.2017.05.006 ↗
30. Chase · 1998
31. Wu · 1993
32. Formation of cathode products of electrolysis of tungstate-molybdate melts10.1007/s11003-012-9493-y ↗
33. Prediction of glass forming ability and glass forming range for electrodeposited binary Co-W alloys10.1063/1.4717723 ↗
34. Formation of ternary carbide Co6W6C by mechanical activation assisted solid-state reaction10.1016/S0955-2219(02)00016-X ↗
35. Preparation of tungsten coatings on graphite by electro-deposition via Na2WO4-WO3 molten salt system10.1016/j.fusengdes.2014.05.027 ↗
36. Theoretical and experimental studies of multiple nucleation10.1016/0013-4686(83)85163-9 ↗