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http://dx.doi.org/10.7844/kirr.2012.21.2.059

Recycling and refining of tantalum scraps by electron beam 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)
Choi, Good-Sun (Gangwon Industrial Technology Research Center, Research Institute of Industrial Science & Technology)
Kim, Hyung-Seok (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.21, no.2, 2012 , pp. 59-65 More about this Journal
Abstract
The refining effect of tantalum by electron beam melting(EBM) process for recycling tantalum scraps was investigated in the study. The purity of the tantalum metals refined by EBM was evaluated using glow discharge mass spectrometry (GDMS). From the result of GDMS, most impurities in the tantalum metals were removed by EBM down to a few mass ppm levels. The purity of the refined tantalum scraps was improved up to 5N (99.9991%) from 4 N (99.996%) of the initial tantalum scraps. The amount of metallic impurities in the tantalum was decreased from 30 ppm to 8 ppm. In addition, the gaseous impurities in the tantalum were decreased from 470 ppm to 50 ppm. Therefore a possibility of refining method for recycling tantalum scraps by EBM process was confirmed in this study.
Keywords
Tantalum; Recycling; Electron beam melting; Glow discharge mass spectrometry;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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