Removal of Boron from Metallurgical Grade Silicon by Chloride Molten Salt

Bin Jie Jia; Ji Jun Wu; Wen Hui Ma; Yan Long Li

doi:10.4028/www.scientific.net/AMR.634-638.3084

Paper Titles

Dynamic Study on Lime Carbonation
p.3065

Effect of pH on PCP Remediation by Smectite Supported Pd / Fe
p.3071

Microstructure Refinement of Medium Carbon Steel through Ti Deoxidation
p.3075

Influence on Concentration of Magnetite with Changing of Fe³⁺/Fe²⁺ in Copper Slag
p.3080

Removal of Boron from Metallurgical Grade Silicon by Chloride Molten Salt
p.3084

Simulation of the Coupled Mass Transfer and Gas-Solid Reaction in Porous Packed Beds
p.3088

Study on the Kinetic Models of the Combustion in Sintering Process
p.3092

Study on the Behavior of SiO₂ Related Phases in the Vanadium Slag
p.3098

Study on Surface Dispersion and Topography of Ceria Supported on γ-Alumina
p.3102

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 634-638Removal of Boron from Metallurgical Grade Silicon...

Removal of Boron from Metallurgical Grade Silicon by Chloride Molten Salt

Abstract:

Removal of boron is one of the greatest barriers in the process of upgrading metallurgical grade silicon (MG-Si) to solar grade silicon (SoG-Si). In this work, a chloride molten salt was used as a new refining reagent for removal of boron from MG-Si. The theoretical supporting for chloride molten salt refining was studied by the thermodynamic analysis at first, which testified that boron could be volatilized and removed from MG-Si melt by generating the gaseous boron chloride species. Then the experiments for the removal of boron were carried out using the chloride molten salt with the different conditions of refining time and the ratio of chloride molten salt to MG-Si. The results showed that the boron content in refined silicon was successfully reduced from 22.0×10-6 to 3.0×10-6 in a medium frequency induction furnace at 1695 K for 2h.

You might also be interested in these eBooks

Advances in Chemical, Material and Metallurgical Engineering

View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 634-638)

Pages:

3084-3087

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.634-638.3084

Citation:

Cite this paper

Online since:

January 2013

Authors:

Bin Jie Jia, Ji Jun Wu, Wen Hui Ma, Yan Long Li

Keywords:

Metallurgical Grade Silicon, Molten Salt, Removal of Boron, Thermodynamic

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] Z.L.Yu, K.Q. Xie, W.H. Ma, Y. Zhou, G. Xie and Y.N. Dai: Rare Metals Vol. 30 (2011) NO.6, p.688.

Google Scholar

[2] K. MORITA, T. Yoshikawa. Trans: Nonferrous Met. Soc. China. Vol. 21(2011) pp.685-690.

Google Scholar

[3] Erlend, F. Nordstrand and M. Tangstad. Metall: Mater. Trans. B. Vol. 43 (2012) NO.4, pp.968-972.

Google Scholar

[4] E. Krystad, K. Tang and G. Tranell: JOM .Vol. 64 (2012) NO.8, pp.968-972.

DOI: 10.1007/s11837-012-0382-5

Google Scholar

[5] B.P. Lee, H.M. Lee, D.H. Park, J.S. Shin, T.U. Yu, B.M. Moon: Sol. Energy Mater. Sol. Cells. Vol. 9（2011）pp.56-58.

Google Scholar

[6] J.J. Wu, W.H. Ma, B. Yang, Y.N. Dai, K. Morita: Trans. Nonferrous Met. Soc. Vol. China .Vol.19(2009) 463-46.

Google Scholar

[7] Z. Ding, W.H. Ma, K.X. Wei, J.J. Wu, Y. Zhou, K.Q. Xie : J. Non-Cryst. Solids. Vol.358. (2012) pp.2708-2712.

Google Scholar

[8] CHASE M W: NIST-JANAF thermochemical Tables, 4th ed. (American Chemical Society and the American Institute of Physics for the National Institute of standards and Technology, New York (1998) pp.221-1754.

Google Scholar