Abstract
The authors have been developing the method to recover the material of sintered carbide in electrochemical machining (ECM). The ECM performance is affected by the change in the electrolyte ingredient when the sintered carbide material is dissolved into the electrolyte. Besides, tungsten and cobalt are costly rare metals. In this report, the feasibility of a process on recovery of tungsten and cobalt by changing soluble substances into insoluble ones was investigated, in which process tungsten as calcium tungstate and cobalt as cobalt hydrate. It was found that the tungsten and cobalt compounds could be recovered by the proposed processes.
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Acknowledgements
The authors acknowledge that this research was supported by SIP (Cross-ministerial Strategic Innovation Promotion Program) of the Council for Science, Technology, and Innovation (The managing corporation is NEDO.) and Program for Building Regional Innovation Ecosystems (Ministry of Education, Culture, Sports, Science and Technology).
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Wang, S., Goto, A., Nakata, A., Hayakawa, K., Sakai, K. (2019). Recovery of Sintered Carbide Material in Electrochemical Machining Process. In: Laukaitis, G. (eds) Recent Advances in Technology Research and Education. INTER-ACADEMIA 2018. Lecture Notes in Networks and Systems, vol 53. Springer, Cham. https://doi.org/10.1007/978-3-319-99834-3_2
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DOI: https://doi.org/10.1007/978-3-319-99834-3_2
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