Exhaust device for electric arc furnaces and relative method

Details Exhaust device for electric arc furnaces and relative method Exhaust device for electric arc furnaces and relative method

1997-04-17

1998-07-28

Hoang, Tu B.

Industrial electric heating furnaces

Environmental control

Arc furnace

373 8, 373 77, 266 44, 266157, F27D 1700

Patent

active

057871086

ABSTRACT:
An exhaust device to suck in the fumes in an electric arc furnace (11) fed either by direct or alternating current. The furnace (11) comprises a crown (20) with at least one aperture (19) to introduce and position the electrodes (12) associated with a cupola, in a vertically raised position, which surrounds the electrodes (12) partially in a vertical direction. The cupola is smaller in diameter than the crown (20), there being included a fourth hole connected to the discharge pipe for the fumes (14). The cupola functions as a decantation chamber (13) substantially cylindrical in shape. The cupola functioning as a decantation chamber (13) including at its upper part a conduit (15) to discharge the fumes projecting tangentially and connecting the cupola functioning as a decantation chamber (13) to the discharge pipe (14), placed at the side of the cupola (13). A method to suck in fumes for an electric arc furnace fed either by alternating or direct current is also provided, wherein the furnace includes a fourth hole connected to a discharge pipe (14) for the fumes associated with a plant.

REFERENCES:
patent: 3164658 (1965-01-01), Yagi
patent: 3539692 (1970-11-01), Heeney
patent: 3555163 (1971-01-01), Lucas
patent: 3999001 (1976-12-01), Overmyer et al.
patent: 4649807 (1987-03-01), Aasen et al.
patent: 5392312 (1995-02-01), Bernet et al.
Stahl Und Eisen, vol. 81, No. 10, pp. 686-687, May 11, 1961.

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