Metallurgical apparatus – With control means responsive to sensed condition – With means responsive to condition of treated material
Patent
1992-12-02
1993-10-19
Kastler, Scott
Metallurgical apparatus
With control means responsive to sensed condition
With means responsive to condition of treated material
266236, B22D 4114
Patent
active
052538478
ABSTRACT:
A system for controlling motion of a metering rod used to regulate the flow of metal from a holding furnace to a tap-out box which comprises a float floating on the surface of the molten metal in the tap-out box, and a metering rod actuator connected to the metering rod to move the metering rod into or out of a tap-out hole interconnecting the holding furnace to the tap-out box. A control valve assembly is mounted on a fixed support and has an inlet orifice connected to an air pressure supply and two outlet orifices, one connected to the metering rod actuator and the other to an exhaust. A blade is connected to the float and is adpated to be moved by it closer or further away from the exhaust orifice so as to control the air exhausted at the outlet orifice of the control valve in proportion to the spacing between the blade and exhaust orifice, resulting in variation in the air pressure at the outlet connected to the metering rod actuator depending upon the float and blade positions.
REFERENCES:
patent: 1728888 (1929-09-01), Joerndt et al.
patent: 2816334 (1957-12-01), Edstrand
patent: 3378061 (1968-04-01), Von Alt et al.
patent: 4460163 (1984-07-01), Hornung
Kastler Scott
Noranda USA, Inc.
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