Control of carbon balance in a silicon smelting furnace

Details Control of carbon balance in a silicon smelting furnace Control of carbon balance in a silicon smelting furnace

C - Chemistry, Metallurgy

01

B

C01B 33/027 (2006.01) C01B 33/025 (2006.01)

Patent

CA 2055307

CONTROL OF CARBON BALANCE IN A SILICON SMELTING FURNACE ABSTRACT The present invention is a process for the carbothermic reduction of silicon dioxide to form elemental silicon. Carbon balance of the process is assessed by measuring the amount of carbon monoxide evolved in offgas exiting the furnace. A ratio of the amount of carbon monoxide evolved and the amount of silicon dioxide added to the furnace is determined. Based on this ratio, the carbon balance of the furnace can be determined and carbon feed can be adjusted to maintain the furnace in carbon balance.

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