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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Study of the Removal of Aluminum from Metallurgical Grade Silicon by Oxidation Slagging Method
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 1527-1531)
Author(s): Yu-yan Hu, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China Base of Production, Education & Research on Energy Storage and Power Battery of Guangdong Higher Education Institutes, Guangzhou 510006, P. R. China; Enginee
Dong-liang Lu, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China Base of Production, Education & Research on Energy Storage and Power Battery of Guangdong Higher Education Institutes, Guangzhou 510006, P. R. China; Enginee
Tao Lin, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China Base of Production, Education & Research on Energy Storage and Power Battery of Guangdong Higher Education Institutes, Guangzhou 510006, P. R. China; Enginee
Yan-hui Sun, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China Base of Production, Education & Research on Energy Storage and Power Battery of Guangdong Higher Education Institutes, Guangzhou 510006, P. R. China; Enginee
Chang-juan Guo, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China Base of Production, Education & Research on Energy Storage and Power Battery of Guangdong Higher Education Institutes, Guangzhou 510006, P. R. China; Enginee
Qian-shu Li, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China Base of Production, Education & Research on Energy Storage and Power Battery of Guangdong Higher Education Institutes, Guangzhou 510006, P. R. China; Enginee
Hong-yu Chen, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China Base of Production, Education & Research on Energy Storage and Power Battery of Guangdong Higher Education Institutes, Guangzhou 510006, P. R. China; Enginee
Abstract: The removal of aluminum of metallurgical grade silicon were researched by choosing SiO2-Na2CO3 as the slagging agents. And then the influence factors on the removal efficiency of aluminum such as the composition of SiO2 and Na2CO3, the ratio of slag to silicon and the refining time were investigated by the orthogonal experiment. The microstructure and purity of silicon were characterized and detected by electron microscope analysis, energy dispersive X-ray spectrometers analysis and inductive coupled plasma atomic emission spectroscopy analysis. The results showed that the optional parameters of the oxidation refining for removing aluminum were as follows: the main composition of the oxidant is SiO2：Na2CO3 = 60% : 40%, the slag/silicon ratio is 0.3 and the time for refining is 60 min at 1550℃. The results indicated that the removal efficiency of aluminum was 99.26%, and the content of aluminum in MG-Si can be reduced to 8.78 ppmw under the best refining process.
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