Molten steel pouring nozzle

Details Molten steel pouring nozzle Molten steel pouring nozzle

1988-12-05

1989-08-08

Kastler, S.

Dispensing

Molten metal dispensing

With subjacent flow guide

266236, B22D 4108

Patent

active

048544876

ABSTRACT:
A molten steel pouring nozzle comprising an upper nozzle made of a refractory, an upper end portion of which is to be inserted into a bottom wall of a molten steel receiving vessel; a lower nozzle made of a refractory, having, on an upper end portion thereof, a recess for receiving a lower end portion of the upper nozzle; and an open air shutoff means for preventing an open air from penetrating through an interface between the lower end portion of the upper nozzle and the recess of the lower nozzle. The open air shutoff means comprises a steel shell covering the upper end portion of the lower nozzle and having on a side surface thereof an inert gas feed port; an annular equalizing chamber, provided between the upper end portion of the lower nozzle and the side surface of the steel shell, communicating with the inert gas feed port of the steel shell; and a plurality of grooves formed between the upper end surface of the lower nozzle and the upper surface of the steel shell, one end of each of the grooves communicating with the annular equalizing chamber, and the other end thereof communicating with the recess of the lower nozzle.

REFERENCES:
patent: 4429816 (1984-02-01), Thrower
patent: 4756452 (1988-07-01), Tsukamoto et al.

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