Industrial electric heating furnaces – Arc furnace device – Power supply system
Patent
1991-07-23
1993-12-28
Reynolds, Bruce A.
Industrial electric heating furnaces
Arc furnace device
Power supply system
373105, 373 94, H05B 712
Patent
active
052746640
ABSTRACT:
Method and device to control the force applied to the electrode-bearing arms of an electric arc furnace, the vertical regulation of the electrodes being achieved with an electrohydraulic or electropneumatic system consisting of an operational cylinder actuated by a fluid under pressure so as to raise and lower the electrodes, the control means of the system being adjustable by means of an electrical device, whereby the working pressure of the operational cylinder is measured by a pressure transducer (15) and is processed by a processor system (16) so as to obtain the weight of the electrodes and the condition of static pressure, the processor system (16) governing a quick-response servovalve (18) and being governed by an interface (19) of the system that adjusts the electrical current fed to the electrodes (11).
REFERENCES:
patent: 3614284 (1971-10-01), Scheidig et al.
patent: 3650311 (1972-03-01), Fritsche
patent: 3937869 (1976-02-01), Markarian et al.
patent: 4131754 (1978-12-01), Roberts
patent: 4349911 (1982-09-01), Orbans
patent: 4586187 (1986-04-01), Hein et al.
patent: 4742528 (1988-05-01), Stenzel
Gensini Gianni
Nigris Giovanni
Danieli & C. Officine Meccaniche SpA
Jeffery John A.
Reynolds Bruce A.
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