Electromagnetic valve for controlling the flow of molten, magnet

Details Electromagnetic valve for controlling the flow of molten, magnet Electromagnetic valve for controlling the flow of molten, magnet

1996-01-29

1998-06-16

Kastler, Scott

Dispensing

Processes of dispensing

Molten metal

222594, 266237, C21C 542

Patent

active

057657300

ABSTRACT:
An electromagnetic valve for controlling the flow of molten, magnetic material is provided, which comprises an induction coil for generating a magnetic field in response to an applied alternating electrical current, a housing, and a refractory composite nozzle. The nozzle is comprised of an inner sleeve composed of an erosion resistant refractory material (e.g., a zirconia ceramic) through which molten, magnetic metal flows, a refractory outer shell, and an intermediate compressible refractory material, e.g., unset, high alumina, thermosetting mortar. The compressible refractory material is sandwiched between the inner sleeve and outer shell, and absorbs differential expansion stresses that develop within the nozzle due to extreme thermal gradients. The sandwiched layer of compressible refractory material prevents destructive cracks from developing in the refractory outer shell.

REFERENCES:
patent: 3044499 (1962-07-01), Frerich
patent: 3495630 (1970-02-01), Hansen et al.
patent: 3801083 (1974-04-01), Mantey et al.
patent: 4356994 (1982-11-01), Thornton
patent: 4568007 (1986-02-01), Fishler
patent: 4776502 (1988-10-01), Hagenburger et al.
patent: 4842170 (1989-06-01), Del Vecchio et al.
patent: 5186886 (1993-02-01), Zerinvary et al.
patent: 5350159 (1994-09-01), Parker

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