Dispensing – Molten metal dispensing – With heating or cooling
Patent
1996-11-19
1997-11-25
Kastler, Scott
Dispensing
Molten metal dispensing
With heating or cooling
222594, 222598, 266237, B22D 4114
Patent
active
056908547
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a regulation and closure apparatus for use on a metallurgical vessel and including a stator to be disposed in a vessel wall and a rotor is rotatably supported within, the stator and the rotor including throughflow openings which through rotation of the stator can be made to coincide, and the rotor having a through-passage channel for melt.
Such apparatus is described in EP 0 361 052 B1. Heating the melt in the region of this apparatus is not provided. In extreme cases the melt can zonally assume temperatures which are too low for smooth operation. For example, the melt can solidify between sealing surfaces which exist in areas surrounding the throughflow openings.
DE 44 05 082 A1 described an electromagnetic throughflow regulation device (EMV) with a nozzle in combination with an On/Off valve, namely a slide closure. Since the nozzle comprises an electrically non-conducting material, the melt therein couples, but not the nozzle itself, to the electromagnetic field of a coil. In the slide closure the electromagnetic field for the purpose of melting is said to couple to potentially solidified melt. Since the slide is far outside the field of the coil, this can hardly be achieved, at best with long time delays.
Coupling of the melt for the purpose of throughflow regulation always entails a temperature increase of the melt. However, choking the melt flow is not possible independently of heating the melt.
SUMMARY OF THE INVENTION
The invention addresses the problem of providing a regulation and closure apparatus of the above stated type in which choking or regulation and closure of a melt flow from a vessel is integrated with a capability of heating the melt. The heating takes place preferably independently of the regulation or closure function.
According to the invention the above problem is solved by providing a regulation and closure apparatus of the above type whereby the rotor is encompassed by an inductor to whose field the melt in the through-passage channel or the rotor can be coupled electromagnetically. With this apparatus, by rotation of the rotor, the melt flow can be choked and interrupted and the melt heated so that the melt does not solidify or is meltable after a potential solidification or, if necessary, is reheatable.
If the rotor is coupled to the electromagnetic field, the melt is heated through the transfer of heat from the rotor.
If the melt itself is coupled to the electromagnetic field, the melt is heated directly. Closing can take place independently by rotation of the rotor. A choking function results from the effect of the electromagnetic field. This can be augmented through a displacement body in the through-passage channel. The melt flow additionally can also be controlled by rotation of the rotor.
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantageous features of the invention will be apparent from the following description with reference to the accompanying drawings, wherein:
FIG. 1 is a sectional view of a regulation and closure apparatus for a metallurgical vessel according to an embodiment of the inventions; and
FIG. 2 is a sectional view similar to FIG. 1 but of a further embodiment.
DETAILED DESCRIPTION OF THE INVENTION
A stator (1) of a refractory ceramic material is set into a vessel bottom (2) of a metallurgical vessel. The stator (1) includes laterally at least one throughflow opening (3) in which terminates the interior of the vessel. In the stator (1) a hollow cylindrical rotor (4) is supported rotatably about a vertical axis (A). The rotor (4) includes at least one throughflow opening (5) corresponding to the throughflow opening (3) and terminates in a through-passage channel (6) disposed in the rotor (4).
Between stator (1) and rotor (4), in areas or portions surrounding the throughflow openings (3, 5), are cylindrical sealing surfaces (7). Below the sealing surfaces (7) is a clearance (8) terminating in an annular gap (9) into which inert gas can be introduced through a line (10).
By rotating the rotor (4
REFERENCES:
patent: 4655237 (1987-04-01), Gloor et al.
patent: 4905876 (1990-03-01), Gimpera
patent: 5078306 (1992-01-01), Keller et al.
patent: 5350159 (1994-09-01), Parker
Ardell Rick
Bruckner Raimund
Schiefer Bernhard
Didier-Werke AG
Kastler Scott
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