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Removal of Phosphorus in Metallurgical Grade Silicon Using Electron Beam Melting

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Abstract:

The effects of melting condition on the dephosphorization behavior in metallurgical grade silicon (MG-Si) by electron beam melting (EBM) were investigated in this study. Experiment results showed that phosphorus content decreased by evaporation with the increase of melting time, and evaporation rate increased with the increase of electron beam power. Phosphorus content decreased to below 0.1 ppmw by EBM treatment at 21 kW for 1800 seconds. The dephosphorization reaction was found to follow the first order kinetics. Dephosphorization rate was controlled by free evaporation.

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Periodical:

Materials Science Forum (Volumes 675-677)

Pages:

45-48

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.675-677.45

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Online since:

February 2011

Authors:

Wei Dong, Qiang Wang, Xu Peng, Yi Tan, Da Chuan Jiang

Keywords:

Dephosphorization, Electron Beam Melting (EBM), Rate Constant, Silicon

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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