Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Recyling and refining of molybdenum scraps by vacuum arc melting

진공(眞空) 아크 용해(溶解)에 의한 몰리브덴 스크랩의 재활용(再活用) 및 정련(精鍊)

  • Lee, Back-Kyu (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Oh, Jung-Min (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Seoung-Won (Department of Metallurgical Engineering, Chungnam National University) ;
  • Kim, Sang-Bae (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Lim, Jae-Won (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 이백규 (한국지질자원연구원 광물자원연구본부) ;
  • 오정민 (한국지질자원연구원 광물자원연구본부) ;
  • 이승원 (충남대학교 금속공학과) ;
  • 김상배 (한국지질자원연구원 광물자원연구본부) ;
  • 임재원 (한국지질자원연구원 광물자원연구본부)
  • Received : 2011.07.18
  • Accepted : 2011.09.23
  • Published : 2011.10.31
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Abstract

We carried out to investigate the refining effect of molybdenum by Ar-H$_2$ vacuum arc melting(VAM) process for recycling Mo scrap. The purity of the Mo metals refined by VAM was evaluated using glow discharge mass spectromety(GDMS). From the result of GDMS, most impurities in the Mo metals except for W were removed by Ar-H$_2$ VAM down to a few mass ppm levels. The purity of the refined molybdenum scrap was improved up to 4N5(99.995%) from 3N(99.95%) of the initial Mo scrap. The amount of gaseous impurities such as C, N, and O in Mo scrap were decreased from 1290 ppm to 132 ppm. As a result, it is considered that a possibility of refining and cost-effective method for recycling Mo scrap by Ar-H$_2$ vacuum arc melting process was confirmed in this study.

본 연구는 전자산업용 몰리브덴 스크랩의 재활용을 위하여 수소 첨가 아르곤(Ar-H$_2$) 분위기의 진공 아크 용해(VAM)에 의한 정련 효과를 조사하였고 정련된 몰리브덴의 극미량 불순물은 글로방전 질량분석기(GDMS)를 이용하여 분석하였다. 텅스텐을 제외한 몰리브덴 내 대부분의 불순물은 Ar-H$_2$ VAM의 의하여 수 ppm 수준으로 제거되어 초기 몰리브덴 스크랩의 순도인 3N(99.95%)급에서 4N(99.995%)급으로 향상되었다. 또한 몰리브덴 내 가스 불순물인 C, N, O의 경우 초기 1290 ppm에서 Ar-H$_2$ VAM에 의해 132 ppm으로 감소함을 확인하였다. 따라서 본 연구는 플라즈마 및 전자빔 용해에 비해 경제적인 용해법인 진공 아크 용해에 의해 몰리브덴 스크랩의 재활용 가능성 및 정련효과를 확인할 수 있었다.

Keywords

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