Apparatus for de-gassing molten metal

Details Apparatus for de-gassing molten metal Apparatus for de-gassing molten metal

1997-05-14

1998-12-08

Kastler, Scott

Metallurgical apparatus

Process

Tuyere operation

266217, 266220, 222603, C21B 716

Patent

active

058464794

ABSTRACT:
Argon injection nozzles are provided in a close-spaced series lengthwise along a treatment trough, in which liquid aluminum is conveyed. The gas is blown in at high Reynolds No, whereby the jets break up into small bubbles. A high average bubble population density is achieved over the whole volume of liquid metal in the treatment trough. De-gassing is achieved in a metal residence time of 15 to 60 seconds, whereby the trough in which treatment takes place can be small.

REFERENCES:
patent: 3689048 (1972-09-01), Foulard et al.
patent: 3904180 (1975-09-01), Bass et al.
patent: 4179102 (1979-12-01), Clumpner
patent: 4317679 (1982-03-01), Dantzig et al.
patent: 4670050 (1987-06-01), Ootsuka et al.
patent: 4744545 (1988-05-01), McDonald et al.
Light Metals 1991; The Minerals, Metals & Materials Society, Feb. 1990.
Light Metals 1996; The Minerals, Metals & Materials Society, Feb. 1996.

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