Mold fluxes used in the continuous casting of steel

Details Mold fluxes used in the continuous casting of steel Mold fluxes used in the continuous casting of steel

1995-04-10

1996-11-26

Hail, III, Joseph J.

Metal founding

Process

Shaping liquid metal against a forming surface

148 26, 75305, C21C 7076

Patent

active

055775497

ABSTRACT:
A mold flux for the continuous casting of steel (including ultra low carbon steel) comprises refractory metal oxide, at least one fluxing agent, a binder, and expandable graphite in the amount of 0.3-1.0% by weight, the expandable graphite having a size less than about 80 mesh, and the flux in the form of spherical granules 200-500 microns in diameter. The binder typically comprises between about 8-14% weight soda ash, or between about 4-7% by weight lithium carbonate, or a combination of soda ash and lithium carbonate wherein double the percentage of lithium carbonate plus the percentage of soda ash is between about 8-14%. The flux may additionally include--especially where ultra low carbon steel is being continuously cast--starch and MnO.sub.2 to reduce slag rim, improve thermal insulation, and reduce carbon pickup.

REFERENCES:
patent: 4221595 (1980-09-01), Zebrowski
patent: 4321154 (1982-03-01), Ledru
patent: 4561912 (1985-12-01), Courtenay et al.
patent: 4785872 (1988-11-01), Koul et al.
patent: 5240492 (1993-08-01), Phillips et al.
The Making shaping and treating of Steel, USS ed by McGannon (1971) pp. 240-243.

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