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

1985-10-08

1986-12-30

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 12, 75 49, C22B 400

Patent

active

046327002

ABSTRACT:
Method and 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, by disposing at least two plasma torches above the melt in the receiving vessel to direct a transferred electric arc at the melt; and operating the torches with alternating current and with a gas which is inert to the metal melt, while cooling the torches 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: 3147329 (1964-09-01), Gage
patent: 3547622 (1970-12-01), Hutchinson
patent: 3764297 (1973-10-01), Coad
patent: 4200452 (1980-04-01), Savov
patent: 4401464 (1983-08-01), Tivelius
patent: 4466824 (1984-08-01), Gauvin

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