Silicon purification method

Details Silicon purification method Silicon purification method

C - Chemistry, Metallurgy

01

B

23/327

C01B 33/037 (2006.01) C01B 33/02 (2006.01)

Patent

CA 1130985

Abstract of the Disclosure A method for purifiying silicon comprises the steps of providing a body of molten silicon-rich material and extracting heat therefrom to provide a solid phase containing silicon in crystal form and to concentrate impurities in a molten phase. After a desired amount of heat has been extracted, a substantial part of the molten phase is separated from the solid phase. A fraction or portion of the solid phase is remelted for purposes of removing solvent metal, including impurities, from the crystals, and at least one fraction of the remelted material is separated from the crystals.

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