Method and apparatus for operating a direct-current arc furnace

Details Method and apparatus for operating a direct-current arc furnace Method and apparatus for operating a direct-current arc furnace

1986-04-21

1988-03-08

Envall, Jr., Roy N.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

373108, H05B 702, H05B 720

Patent

active

047303379

ABSTRACT:
In a direct-current arc furnace, the service life of the bottom electrode can be extended substantially, if the cooling unit cooling the bottom electrode during the melting operations is not switched off during longer stoppages, as has been customary thus far, but continues to be operated at a reduced cooling output during at least a part of the stoppage. The cooling unit is preferably controlled during the stoppage according to such a program and in dependence of the respective measured temperature of the bottom electrode, so that the temperature of the bottom electrode is maintained within a preset range.

REFERENCES:
patent: 4137422 (1979-01-01), Barbashin
patent: 4435812 (1984-03-01), Guido et al.
patent: 4566108 (1986-01-01), Buhler
patent: 4601041 (1986-07-01), Muller
patent: 4628516 (1986-12-01), Voss-Spilker

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