DC arc furnace arc control

Details DC arc furnace arc control DC arc furnace arc control

1977-10-03

1979-01-16

Envall, Jr., R. N.

H05B 700

Patent

active

041350529

ABSTRACT:
A DC arc furnace having one or more arcing electrodes and a melt contact electrode transversely offset from the arcing electrode is provided on the outside of the furnace with control electromagnets which are supplied with DC for the purpose of keeping the arc substantially axially aligned with the arcing electrode. For more positive control of the arc direction, radiation sensing devices are provided and which are arranged to receive more or less radiation from the arc if it wanders away from its desired vertical alignment with the arcing electrode. In turn, these devices are used to control the power supplied to the control electromagnets to alter the strength of their magnetic flux, so that if it wanders from axial alignment with the arcing electrode, the arc is substantially immediately returned to that alignment.

REFERENCES:
patent: 3371140 (1968-02-01), Wynne
patent: 4016355 (1977-04-01), Stenkvist

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