Bottom structure for a DC electric arc furnace

Details Bottom structure for a DC electric arc furnace Bottom structure for a DC electric arc furnace

1992-03-05

1993-12-07

Reynolds, Bruce A.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

373 71, 373101, 373108, F27D 100

Patent

active

052689247

ABSTRACT:
A refractory is laid on a base plate provided with a connector for the connection of a power source apparatus. Many electrode pins are inserted through the refractory and fixed in the base plate at their lower ends. The base plate is made of a steel upper plate member and a copper lower plate member overlapped one on the other and the lower end portions of the many electrode pins are electrically connected to the lower plate member through the upper plate member. When a DC electric arc furnace is operated, the electric current supplied to the connector reaches all the electrode pins mainly through the lower plate member in the base plate and flows from there homogeneously through the pins into the molten metal pool in the furnace.

REFERENCES:
patent: 941419 (1909-11-01), Keller
patent: 1234947 (1917-07-01), Sperling
patent: 4277638 (1981-07-01), Stenkvist
patent: 4435812 (1984-03-01), Guido et al.
patent: 4601041 (1986-07-01), Muller
patent: 4628516 (1986-12-01), Voss-Spilker et al.
patent: 4646316 (1987-02-01), Michelet et al.
patent: 4685112 (1987-08-01), Michelet et al.
patent: 4730337 (1988-03-01), Schubert
patent: 4730338 (1988-03-01), Guido
patent: 4754464 (1988-06-01), Feuerstake
Electrode Block for a DC Electric Furnace-Publication No. 1-128392. Published Japan May 22, 1989--pp. 507-509.
Bottom Structure-Publication No. 2-287090. Published Japan Nov. 27, 1990--pp. 597-601.

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