Method and apparatus for holding or increasing the temperature i

Details Method and apparatus for holding or increasing the temperature i Method and apparatus for holding or increasing the temperature i

1986-09-03

1987-12-15

Envall, Jr., Roy N.

Industrial electric heating furnaces

Plasma furnace device

Direct furnace

H05B 700

Patent

active

047138262

ABSTRACT:
Apparatus for supplying thermal energy to a metal melt present in a receiving vessel after having been discharged from a melting furnace, the receiving vessel having a central axis, the apparatus includes at least two plasma torches disposed above the melt in the receiving vessel to direct a transferred electric arc at the melt, the torches being operated with alternating current and with a gas which is inert to the melt, while being cooled with water.
Apparatus according to the invention includes a cover over the top of the vessel, the cover having a passage for the electrodes, and a component establishing a gas-tight seal between the cover and the electrodes.

REFERENCES:
patent: 1338881 (1920-05-01), Stock
patent: 4521890 (1985-06-01), Burnham et al.

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