Industrial electric heating furnaces – Plasma furnace device – Direct furnace
Patent
1990-05-11
1992-01-14
Reynolds, Bruce A.
Industrial electric heating furnaces
Plasma furnace device
Direct furnace
373 40, 373 49, 373 77, 373102, 373105, 373106, 219497, H05B 700, H05H 100
Patent
active
050816403
ABSTRACT:
A method of controlling the course over time of a target temperature of a molten metal in a ladle, for example, in which the required heating power is produced by at least one plasma torch. Determination is made of the variation with time of a target temperature, the mass of an outwardly flowing melt, and a specific heat value of the melt present in the ladle. From the foregoing values there is ascertained the course of a corresponding setting signal for obtaining the heating power necessary to obtain the desired temperature course. Simultaneously and continuously the actual temperature of the melt is measured. When the actual temperature of the melt deviates from its target temperature in excess of a predetermined tolerance, the setting signal for the heating power is changed by decreasing such setting when an actual temperature exceeds the target temperature, and increasing such setting when an actual temperature is less than the target temperature.
REFERENCES:
patent: 3333452 (1967-08-01), Sendzimir
patent: 4323763 (1982-04-01), Goldsmith
patent: 4484947 (1984-11-01), Marshall
patent: 4486211 (1984-12-01), Monaghan
Bebber Hans J.
Brabandt Karsten
Espendiller Bernhard
Hoang Tu
Mannesmann Aktiengesellschaft
Reynolds Bruce A.
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