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http://dx.doi.org/10.7844/kirr.2011.20.5.040

Recyling and refining of molybdenum scraps by vacuum arc melting  

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)
Publication Information
Resources Recycling / v.20, no.5, 2011 , pp. 40-45 More about this Journal
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.
Keywords
Molybdenum; Impurity; Vacuum arc melting; Glow discharge mass spectrometry;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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