Cooling arrangement of a bottom electrode for a direct-current a

Details Cooling arrangement of a bottom electrode for a direct-current a Cooling arrangement of a bottom electrode for a direct-current a

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

045649510

ABSTRACT:
A direct-current electric arc furnace for melting metals including a furnace vessel and at least a pair of electrodes, wherein a bottom electrode is mounted in the bottom of the furnace vessel. In order to be able to provide good cooling for the bottom electrode, a connecting piece directly or indirectly cooled is provided in contact with the bottom electrode and serves as a contact sleeve. The contact surfaces of the connecting piece expand conically in the direction of the furnace vessel bottom. By pairing the external truncated cone of the bottom electrode with the internal truncated cone of the connecting part, a proper electric and thermal contact is made between the two parts. In addition, the contact sleeve is provided with cooling ducts for a liquid cooling system which further enhances the cooling effect.

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

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