Bottom blown gas blowing apparatus for molten metal ladle

Details Bottom blown gas blowing apparatus for molten metal ladle Bottom blown gas blowing apparatus for molten metal ladle

1998-02-24

1999-08-31

Kastler, Scott

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By means introducing treating material

266224, 266265, C21C 548

Patent

active

059450630

ABSTRACT:
The present invention relates to an apparatus for supplying bottom-blown gas through a porous plug in a ladle and for molten metal refining. A gas supply pipe 3 is connected to a bottom-blowing porous plug 2 attached at the bottom of a ladle 1. An accumulator tank 11a, is provided in parallel with the gas supply pipe 3. The bottom-blown gas is accumulated in the accumulator tank 11a, and blown into the ladle 1 to agitate the molten metal through the gas supply pipe 3 during refining. After the refining is finished, the switching valve 4 of the gas supply pipe 3 is closed, the switching valve 4a of the accumulator tank 11a is opened and the bottom blowing of a small amount of gas is supplied, and the blowing apparatus 10 is separated from the gas supply source 6 at joint 5. The bottom blowing of a small amount of gas for a long period of time prevents the molten metal from permeating into the ventilating pores of the bottom blowing porous plug after the refining, so that the solidification of molten metal in the ventilating pores of porous plug and the clogging of the pores can be avoided. Thereby, the repeated use of porous plug is made possible without the replacement of the porous plug.

REFERENCES:
patent: 3080228 (1963-03-01), Hale et al.
patent: 3291596 (1966-12-01), Verge et al.
patent: 3809146 (1974-05-01), Andrzajak et al.
Japanese Abstract No. JP40210845A of Appl No. JP 63260917, Sakaguchi et al, Apr. 1990.

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