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Upgrade Metallurgical Grade Silicon

  • Wen-hui Ma
  • Ji-Jun Wu
  • Kui-xian Wei
  • Yun Lei
Living reference work entry

Abstract

Producing upgraded metallurgical-grade silicon may be the most promising method to replace the modified Siemens process to produce solar-grade silicon, which has many advantages such as no pollution and low cost in the production process. The main process is described in detail, including smelting and secondary refining of metallurgical-grade silicon and acid leaching treatment. Other technologies also are introduced and discussed: solvent refining, vacuum treatment, plasma refining, and electron beam treatment; these technologies are used to refine metallurgical-grade silicon. Purification is also very important in the production process; a solidification process is used in purification to obtain highly pure silicon.

Keywords

Metallurgical-grade silicon Impurity removal Solar-grade silicon Refining Purification 

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Copyright information

© Springer-Verlag GmbH Germany 2018

Authors and Affiliations

  1. 1.National Engineering Laboratory for Vacuum Metallurgy, Faculty of Materials and Metallurgical EngineeringKunming University of Science and TechnologyKunming, YunnanChina

Section editors and affiliations

  • Yuepeng Wan
    • 1
  1. 1.GCL-POLY Energy Holdings LimitedXuzhou Economic Development ZoneChina

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