Method of purifying steel

Details Method of purifying steel Method of purifying steel

1987-02-03

1988-02-16

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 5926, C21C 548

Patent

active

047253100

ABSTRACT:
A method of purifying steel in a tundish, especially to remove alumina inclusions, comprises passing the steel through at least one refractory board having apertures through it and introducing inert gas into the steel at the upstream side of the foot of the board to cause a stream of bubbles to flow over the upstream side of the board. One of the boards may comprise a ceramic filter element. The boards may be non-vertical and have integral gas supply means. The apertures may taper, may have axes angled from perpendicular to the board's plane and may have high alumina content surfaces. The upstream side of the board may have an exothermic layer.

REFERENCES:
patent: 2843473 (1958-07-01), Colbry
patent: 3393998 (1968-07-01), Lambert
patent: 3528799 (1970-09-01), Ramacciotti
patent: 3734718 (1973-05-01), Bradshaw
patent: 3817502 (1974-06-01), Taylor
patent: 4386956 (1983-06-01), Roth

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