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http://dx.doi.org/10.7844/kirr.2011.20.5.034

Removal of Iron and Phosphorus from Metallurgical Grade Silicon by Melting with Ca and Aqua Regia Leaching  

SaKong, Seong-Dae (Dept. of Materials Science and Metallurgical Engineering, Kyungpook National University)
Sohn, Ho-Sang (Dept. of Materials Science and Metallurgical Engineering, Kyungpook National University)
Publication Information
Resources Recycling / v.20, no.5, 2011 , pp. 34-39 More about this Journal
Abstract
Metallurgical grade silicon(MG-Si) was melted with Ca at 1500$^{\circ}C$ under Ar atmosphere. The sample was cooled at 10 $^{\circ}C$/min to room temperature and leached in aqua regia. In the present study, the effect of Ca addition and conditions of acid leaching on removal of Fe and P in MG-Si were investigated. CaSi$_2$ phase was formed at the grain boundary of MG-Si melting with Ca. Also FeSi$_2$ phase was precipitated in CaSi$_2$ phase. By the formation of CaSi$_2$ phase, 97% of Fe and 66 % of P were removed from Ca added MG-Si with the particle size of 600~850${\mu}m$ by aqua regia(more than 30%) leaching.
Keywords
Solar cell; Iron; Phosphorus; Calcium; Aqua regia; Leaching;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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