Handling of by-product gases from a silicon furnace

Chemistry of inorganic compounds – Silicon or compound thereof – Elemental silicon

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55 68, 55 82, 75 1012, 75 1036, 204164, 266146, C01B 3302

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active

047029021

ABSTRACT:
What is disclosed is an improvement in a process for the carbothermic reduction of silicon dioxide to form silicon, the improvement comprising (a) contacting the by-produced gases from the silicon furnace with a cooling medium such as a vaporizing liquified hydrocarbon-containing gas or an expanding compressed hydrocarbon-containing gas to cool the by-produced gases and to cause silicon-containing materials to completely condense and to form agglomerated solids; (b) removing the agglomerated, solid materials from the gases, and (c) recovering value from the solids-free by-produced gases as an energy source or as a chemical intermediate.

REFERENCES:
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patent: 4457902 (1984-07-01), Watson
Nagamori et al., Met. Trans, 1986, vol. 17B, p. 503.
Ramsdstad et al., Met. Soc. AIME (1961), vol. 22, p. 1021.
JANAF Thermochemical Tables, Dow Chemical Co., Midland, Mich. 1986.
Kubaschewski et al., Metallurgical Thermo Chemistry, 5th Ed., Pergamon Press, N.Y., N.Y.
Gel'd et al., The Priklady Khim, 1948, vol. 21, p. 1249.

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