Arc furnace and method in which molten material is stirred and t

Details Arc furnace and method in which molten material is stirred and t Arc furnace and method in which molten material is stirred and t

1997-02-26

1999-09-21

Hoang, Tu Ba

Industrial electric heating furnaces

Arc furnace device

Power supply system

373 85, 373107, H05B 7144

Patent

active

059563664

ABSTRACT:
A direct current electric arc furnace for melting or heating raw material or molten material. The furnace includes a refractory lined vessel for holding raw or molten material in its interior. The furnace includes at least a first top electrode. The first top electrode enters the vessel interior above the raw or molten material. The furnace includes at least a first bottom electrode mounted in the bottom of the vessel and in electrical contact with the raw or molten material in the vessel. The furnace also includes an electrical power supply mechanism which electrically connects to the top electrode and the bottom electrode in order to input electrical energy into the material through the top and bottom electrodes in the form of an arc. The bottom electrode has an opposite electrical polarity to the electrical polarity of the top electrode. The furnace includes a mechanism for stirring the molten material in the vessel and guiding the arc in the vessel. The stirring and guiding mechanism is in communication with the interior of the vessel. A method for operating a direct current arc furnace.

REFERENCES:
patent: 586822 (1897-07-01), Patten
patent: 2652440 (1953-09-01), Simmons
patent: 2727936 (1955-12-01), Boyer
patent: 3683094 (1972-08-01), Schlienger
patent: 4110546 (1978-08-01), Stenkvist
patent: 4149024 (1979-04-01), Stenkvist et al.
patent: 4931702 (1990-06-01), Voronin et al.
patent: 5317591 (1994-05-01), Stenkvist
patent: 5526374 (1996-06-01), Uebber

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