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Metallurgical and Materials Transactions B

, Volume 49, Issue 4, pp 1658–1664 | Cite as

Dephosphorization of Levitated Silicon-Iron Droplets for Production of Solar-Grade Silicon

  • Katherine Le
  • Yindong Yang
  • Mansoor Barati
  • Alexander McLean
Article
  • 104 Downloads

Abstract

The treatment of relatively inexpensive silicon-iron alloys is a potential refining route in order to generate solar-grade silicon. Phosphorus is one of the more difficult impurity elements to remove by conventional processing. In this study, electromagnetic levitation was used to investigate phosphorus behavior in silicon-iron alloy droplets exposed to H2-Ar gas mixtures under various experimental conditions including, refining time, temperature (1723 K to 1993 K), gas flow rate, iron content, and initial phosphorus concentration in the alloy. Thermodynamic modeling of the dephosphorization reaction permitted prediction of the various gaseous products and indicated that diatomic phosphorus is the dominant species formed.

Notes

Acknowledgments

Appreciation is expressed to the Natural Sciences and Engineering Research Council of Canada for providing project funding through a Strategic Research Grant.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Katherine Le
    • 1
  • Yindong Yang
    • 1
  • Mansoor Barati
    • 1
  • Alexander McLean
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of TorontoTorontoCanada

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