Industrial electric heating furnaces – Arc furnace device – Power supply system
Patent
1991-01-10
1992-05-19
Reynolds, Bruce A.
Industrial electric heating furnaces
Arc furnace device
Power supply system
373103, 373104, 373105, 373106, H05B 7144
Patent
active
051154471
ABSTRACT:
System for controlling the positions of each of the three electrodes of a three phase electric furnace to maintain optimum real power delivered to the furnace in the event of electrode short circuiting or arc extinction due to scrap movement in the furnace. The system includes means for determining the magnitude of arc voltage and arc current and means to change the position of selected electrodes when either arc voltage or arc current is determined to be zero.
REFERENCES:
patent: 3376374 (1968-04-01), Bobo
patent: 3597518 (1971-08-01), Roberts
patent: 4096344 (1978-06-01), Munson
patent: 4324944 (1982-04-01), Weihrich et al.
patent: 4349912 (1982-09-01), Bello
patent: 4399545 (1983-08-01), Harmsen et al.
patent: 4663764 (1987-05-01), Bretthauer et al.
patent: 4683577 (1987-07-01), Bretthauer et al.
Solution of Arc-furnace Electrical Circuit in Terms of Arc Voltage--B. Bowen Ironmaking and Steelmaking 1982, vol. 9, No. 4 pp. 178-187.
BBC Brown Boveri Publ. No. CH-1H122 650 F.
Auto. Arc Furnace Cont. H. Schaffer et al Iron & Steel Engr. Aug. 1986 pp. 36-40.
Arc resistance regulation and refractory erosion control--R. W. Roberts (Robican) Electric Furnace Proceedings 1976.
Char. of Electrode Regulation System (Timken-Krupp) I&S.M. Feb. 1988 pp. 23-30.
G. SIMELT electrode control system for electric arc furnaces Georg Weihrich et al, Metallurgical Plant and Technology Mar. 1981.
Hoang Tu
Lieberstein E.
Reynolds Bruce A.
UCAR Carbon Technology Corporation
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