Method for preventing the inclusion of slag into the molten stee

Details Method for preventing the inclusion of slag into the molten stee Method for preventing the inclusion of slag into the molten stee

1982-05-24

1984-10-23

Rutledge, L. Dewayne

Metallurgical apparatus

Process

222590, 266 93, C21B 546

Patent

active

044783922

ABSTRACT:
The method for preventing the inclusion of slag into the molten steel tapped from a converter is disclosed. Such method comprises immersing an elongated stopper in a molten steel contained in the converter until the stopper is positioned at a predetermined height above the inside opening of a tap hole, always directing the elongated stopper to the inside opening irrespective of tilting of the converter such that the stopper could maintain the predetermined position while allowing a constant flow-out of the molten steel into the tap hole through the space formed between the stopper and the inside opening of the tap hole, and lowering the elongated stopper to close the tap hole when the slag floating above the molten steel is about to flow into the tap hole through the space, whereby the inclusion of the slag into the tapped molten steel can be prevented effectively. The apparatus which can efficiently conduct the above method is also disclosed.

REFERENCES:
patent: 2426644 (1947-09-01), Van Der Pyl
patent: 3459209 (1969-08-01), Kobusch et al.
patent: 3465811 (1969-09-01), Castelet
patent: 4037761 (1977-07-01), Kemlo et al.
patent: 4140300 (1979-02-01), Gruner et al.

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