Cooling device for the roof in electric arc furnaces

Details Cooling device for the roof in electric arc furnaces Cooling device for the roof in electric arc furnaces

1997-04-17

1999-07-13

Hoang, Tu B.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

373 73, F27D 102

Patent

active

059236973

ABSTRACT:
Device to cool the roof (10) in electric arc furnaces, of the type comprising a plurality of contiguous panels (27) disposed to cover at least a substantial part of the inner circumferential periphery of the roof (10), each of the panels (27) consisting of at least one pipe (11) wherein cooling fluids circulate, the roof (10) having at least one central aperture (35) to insert, position and move the electrodes (28) and at least one peripheral aperture, or fourth hole (16) to vent the fumes from inside the furnace, each cooled panel (27) covering its own defined arc of the inner circumferential ring of the roof (10) and comprising a spiral-shaped cooling pipe (11), the coils (15) of the spiral lying on respective vertical planes disposed substantially radially with respect to the center of the roof (10), the coils (15) defining a first outer layer (17) and a second inner layer (18) of pipes (11), the first outer layer (17) and second inner layer (18) being separated by a hollow space (19) lying on a plane suitable to the conformation of the roof (10) of the furnace and which serves as an intake ring (19) to circulate the fumes and direct them from inside the furnace towards the discharge aperture (16).

REFERENCES:
patent: 4146742 (1979-03-01), Longenecker
patent: 4197422 (1980-04-01), Fuchs et al.
patent: 5289495 (1994-02-01), Johnson

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