Guard arrangement for a bottom electrode of a direct-current arc

Details Guard arrangement for a bottom electrode of a direct-current arc Guard arrangement for a bottom electrode of a direct-current arc

1984-07-24

1986-01-14

Envall, Jr., Roy N.

Industrial electric heating furnaces

Arc furnace device

Power supply system

373 72, H05B 720

Patent

active

045649502

ABSTRACT:
A direct-current electric arc furnace for melting metals, including a furnace vessel and a bottom electrode mounted in the bottom of the furnace vessel. To prevent molten metal from contacting with current-carrying and liquid-cooled parts of the bottom electrode in the event of an unforeseen break-out of the furnace vessel bottom of the electric furnace, a shielding roof is provided as a guard between the furnace vessel bottom and the current-carrying and liquid-cooled parts. The shielding roof is formed in the shape of a truncated cone and is open downwards. The shielding roof is preferably rigidly joined to the furnace vessel bottom and is formed at least in part with a roof made of refractory material.

REFERENCES:
patent: 4032704 (1977-06-01), Stenkvist

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