Electric furnace with conductive hearth

Details Electric furnace with conductive hearth Electric furnace with conductive hearth

1996-05-28

1999-02-02

Hoang, Tu Ba

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

373108, F27D 100

Patent

active

058675230

ABSTRACT:
An improved return path for electric current through a conductive hearth of a direct current arc furnace is provided by pressing a ring of water cooled copper blocks into the periphery of a sidewall of the hearth of the furnace, the hearth having zones of conductive refractory providing an electrical path between the contents of the furnace of the copper blocks. The hearth is compressed by a tensioned peripheral band which may also support the blocks. The peripheral water cooled copper blocks may be divided into multiple groups, each group connected to one pole of a direct current power supply, the opposite pole of which is connected to a suspended electrode, permitting control of arc deflection.

REFERENCES:
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patent: 1287849 (1918-12-01), Booth
patent: 4204082 (1980-05-01), Stenkvist
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patent: 5052018 (1991-09-01), Meredith
patent: 5173920 (1992-12-01), Bochsler et al.
patent: 5237585 (1993-08-01), Stenkvist
patent: 5297159 (1994-03-01), Dung et al.

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