Method and apparatus for preparing high-purity metallic silicon

Details Method and apparatus for preparing high-purity metallic silicon Method and apparatus for preparing high-purity metallic silicon

C - Chemistry, Metallurgy

01

B

23/325, 23/389

C01B 33/02 (2006.01) C01B 33/021 (2006.01) C01B 33/023 (2006.01) C01B 33/025 (2006.01) F27B 3/08 (2006.01)

Patent

CA 1308233

ABSTRACT OF THE DISCLOSURE: High-yield preparation of high-purity metallic silicon is performed by subjecting a stream of oxides of silicon (e.g. in an aerosol) to reaction heat in the presence of a mixture of a material of the group including silicon carbide and silicon dioxide and a material of the group including carbon and carbon-containing substance. Preferably, silicon oxide produced by the reaction is scavenged from exhaust gas leaving the reaction chamber, re- condensed, and returned to the reaction chamber.

510225

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