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

1990-12-12

1992-12-29

Chaudhuri, Olik

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

204164, 75 1036, 423349, C01B 3302, C22B 400

Patent

active

051749823

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.

REFERENCES:
patent: 3660298 (1972-05-01), McClincy et al.
patent: 4269620 (1981-05-01), Johansson
patent: 4981668 (1991-01-01), Dosai et al.
patent: 5009703 (1991-04-01), Arvidson et al.
Fogler, "Elements of Chemical Reaction Engineering", Prentice Hall, New Jersey (1986), pp. 465-468.

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