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Preparation of High-grade Silica Sand for Metallurgical-grade Si Using a Physical Beneficiation  

Yang, Young-Cheol (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Jeong, Soo-Bok (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Chae, Young-Bae (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Kim, Seong (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Publication Information
Journal of the Mineralogical Society of Korea / v.22, no.3, 2009 , pp. 191-197 More about this Journal
Abstract
It is very important to raise the purity of silica for manufacturing metallurgical-grade silicon because the purification of silicon in the smelting process is very difficult. In present study, the silica sand which is obtained from Vietnam was mineralogically analyzed. Based on the results, a novel process to separate impurities from the silica sand was developed, which consisted of classification, specific gravity and magnetic separation steps. Using the developed process, high-grade silica sand concentrate containing over 99.8 wt% $SiO_2$ was prepared, being suitable for manufacturing the metallurgical-grade silicon.
Keywords
metallurgical-grade silicon; high-grade silica sand; classification; specific gravity separation; magnetic separation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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