A Basic Study on the Recycling of Wasted Cemented Carbide by the Zn Bath Process(Ⅰ)

Kyung-Sik Kim; In-Ho Kim; Chan-Gi Lee; Chang-Bin Song

doi:10.7844/kirr.2020.29.6.35

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Research Paper

A Basic Study on the Recycling of Wasted Cemented Carbide by the Zn Bath Process(Ⅰ) Zn bath 프로세스에 의한 폐초경합금의 재활용에 관한 기초연구(I)

31 December 2020. pp. 35-40

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Abstract

In this study were carried out basic experiments mainly to investigate important reaction mechanism, the reaction temperature, time and the addition amount of Zn in recycling of waste cemented carbide by the zinc bath process. As a result, it was required that the Zn bath reaction was heated more than at 800℃ to accelerate reaction of melted Zn and Co inside of wasted cemented carbide. Furthermore, thickness of the waste cemented carbide was reduced linearly according to increase of reaction time at 700℃ for 0.5~2h in the zinc bath reaction. Also the zinc bath reaction was examined that heating in lower than at 800℃ for 3h and then heated more than at 900℃ for 1h(above 3.0x10 torr^-2 vaccum) was suitable to reduce vapour loss amount of Zn in the zinc bath process.

Keywords

Zn Bath Process

Waste Cemented Carbide

Tungsten

Cobalt

Zinc

본 연구에서는 zinc bath 프로세스에 의한 폐초경합금의 재활용 시 중요한 반응온도, 시간 및 아연의 첨가량 등 반응 메카니즘을 조사하기 위해 기초실험을 수행하였다. 그 결과, zinc bath 반응은 용융 아연(Zn)과 폐초경합금 내측의 코발트(Co)의 반응을 촉진시키기 위해 800℃ 이상에서 가열하는 것이 요구되었다. 또한 폐초경합금의 두께는 800℃에서 0.5~2시간 동안의 zinc bath 프로세스에 있어서 반응시간의 증가에 따라 선형적으로 감소하였으며, 아연의 증발 감소량을 줄이기 위해서는 800℃이하에서 3시간 가열된 후에 2.0x10 torr^-2 이상의 진공분위기로 900℃이상에서 1시간 동안 가열하는 것이 적합한 것으로 조사되었다.

키워드

Zn bath 프로세스

폐초경합금

텅스텐

코발트

아연

References

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Journal of the Korean Institute of Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 29
No :6
Pages :35-40
Received Date : 2020-10-13
Revised Date : 2020-12-07
Accepted Date : 2020-12-14
DOI :https://doi.org/10.7844/kirr.2020.29.6.35

Resources RecyclingISSN:2765-3439(Print) 2765-3447(Online)한국자원리싸이클링학회

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