Dispensing – Molten metal dispensing – Flow controllers or assists
Patent
1984-09-21
1986-07-22
Rolla, Joseph J.
Dispensing
Molten metal dispensing
Flow controllers or assists
222591, 266 45, 266272, 266227, 266230, B22D 4110
Patent
active
046014152
ABSTRACT:
A vortex inhibitor for use in tundishes, ladles, or metal making furnaces prevents the contamination of high quality molten steel by the slag layer which rides atop the surface of molten metal within such receptacles comprises a tapered polygonal body of castable refractory material whose specific gravity is less than the specific gravity of the molten metal but greater than the specific gravity of the slag. The refractory body is buoyantly supported at the interface of the layer of slag and the molten metal and includes a weighted apex so that the apex depends toward nozzle opening within receptacle. Thus, the body centers itself within the swirl of fluid generated during discharge of the fluid through the nozzle, and the inertia of the body substantially deenergizes the vortex so as to avoid formation of a suction funnel which typically draws the slag layer into and through the nozzle with the molten metal below the previously known critical level within the receptacle.
REFERENCES:
patent: 2718389 (1955-09-01), Perrin
patent: 2810169 (1957-10-01), Hofer
patent: 3814407 (1974-06-01), Meyers
patent: 3934755 (1976-01-01), Rheinlander et al.
patent: 4095777 (1978-06-01), Honaker
patent: 4390170 (1983-06-01), Schaefer, IV et al.
patent: 4462574 (1984-07-01), Keenan et al.
patent: 4494734 (1985-01-01), LaBate et al.
patent: 4526349 (1985-07-01), Schwer
Heim Louise S.
Rolla Joseph J.
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