Process for purifying metallurgical-grade silicon

Details Process for purifying metallurgical-grade silicon Process for purifying metallurgical-grade silicon

C - Chemistry, Metallurgy

01

B

23/327

C01B 33/02 (2006.01) C01B 33/037 (2006.01) C30B 11/00 (2006.01)

Patent

CA 1124991

ABSTRACT OF THE DISCLOSURE A process is provided for purifying metallurgical- grade silicon for the manufacture of solar cells, wherein the acid treatment of the silicon, known per se, is com- bined with vacuum evaporation. This may be optionally combined with slag extraction and directional solidifi- cation.

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