Distribution of Representative Impurities in Metallurgical-Grade Silicon Using CaO-SiO2-CaF2 and CaO-SiO2-CaCl2 Slags

Liu Qing Huang; Hui Xian Lai; Cheng Hao Lu; Ming Fang; Juan Chen; Yan Xu Lin; De Qin Yu; Jin Tang Li; Wen Hui Ma; Jian Ning Shen; Xue Tao Luo

doi:10.4028/www.scientific.net/AMR.813.11

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 813Distribution of Representative Impurities in...

Distribution of Representative Impurities in Metallurgical-Grade Silicon Using CaO-SiO₂-CaF₂ and CaO-SiO₂-CaCl₂Slags

Abstract:

This paper presents a detailed analysis of impurities distribution in metallurgical-grade silicon after CaO-SiO2-CaF2 and CaO-SiO2-CaCl2 slags refining. It demonstrates that the impurities removal efficiency generally increase in metallurgical-grade silicon after CaO-SiO2-CaCl2 slag refining compared to that after CaO-SiO2-CaF2 slag refining. It is also determined that metallic impurities like Fe, Al and Ca tend to co-deposit with Si to form Si-Ca based intermetallic compounds in the precipitate phase after slag refining.

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Periodical:

Advanced Materials Research (Volume 813)

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11-15

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.813.11

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Online since:

September 2013

Authors:

Liu Qing Huang, Hui Xian Lai, Cheng Hao Lu, Ming Fang, Juan Chen, Yan Xu Lin, De Qin Yu, Jin Tang Li, Wen Hui Ma, Jian Ning Shen, Xue Tao Luo

Keywords:

Impurities Distribution, Metallurgical-Grade Silicon, Slag Refining

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