Silicon carbide beam as refractory in an open-arc furnace

Details Silicon carbide beam as refractory in an open-arc furnace Silicon carbide beam as refractory in an open-arc furnace

1989-08-31

1991-10-15

Envall, Jr., Roy N.

Industrial electric heating furnaces

Plasma furnace device

373 75, F27D 100

Patent

active

050581260

ABSTRACT:
The instant invention relates to the use of hollow silicon carbide beams as refractory in substantially closed open-arc furnaces used for the carbothermic reduction of metal oxides. The silicon carbide beams are used in areas of the furnace which are exposed to temperatures higher than those tolerated by standard refractories, said areas requiring, in addition, stability to oxidation and reduction type chemical reactions and sufficient electrical resistance to minimize arcing from the exposed electrode. In addition, the invention relates to the use of silicon carbide beams in a two-stage, open-arc furnace for the carbothermic reduction of silicon dioxide to silicon metal.

REFERENCES:
patent: 3783171 (1974-01-01), Klein
patent: 3953007 (1976-04-01), Laar
patent: 3973076 (1976-08-01), Scott, Jr. et al.
patent: 4323718 (1982-04-01), Buhring et al.
patent: 4434495 (1984-02-01), Tomizawa et al.
patent: 4443880 (1984-04-01), Buhler
patent: 4539919 (1985-09-01), Bossetti
patent: 4569660 (1986-02-01), Bossetti
patent: 4721460 (1988-01-01), Bushman
patent: 4897852 (1990-01-01), Dosaj

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