Electric arc furnace insitu scrap preheating process

Details Electric arc furnace insitu scrap preheating process Electric arc furnace insitu scrap preheating process

1993-02-26

1994-12-20

Reynolds, Bruce A.

Industrial electric heating furnaces

Arc furnace device

For manipulation of the charge or melt

373 81, F27D 2304

Patent

active

053751396

ABSTRACT:
The present invention discloses an electric arc furnace wherein the natural gas flow is artificially altered to obtain beneficial effects. By injecting gases, preferably but not necessarily containing oxygen, into the electric arc furnace in the vicinity of the electrode port, the injected gases move vertically downward near the furnace center toward the bath. This process of injecting gases downward around the electrode enables the natural circulation in the furnace to be reversed. When gases reach the bath level, they disperse outward penetrating the scrap and depositing heat energy thereon. By preheating the scrap in this manner production is increased and emissions released into the off-gas system can be reduced.

REFERENCES:
patent: 2303973 (1942-12-01), Armstrong
patent: 2769705 (1956-11-01), vrom Sem
patent: 3666871 (1972-05-01), Thom et al.
patent: 4160868 (1979-07-01), Marchner et al.
patent: 4617671 (1986-10-01), Lugscheider et al.
patent: 4816230 (1989-03-01), Bortnik et al.

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