Refractory device for introducing a gas into a molten metal and

Details Refractory device for introducing a gas into a molten metal and Refractory device for introducing a gas into a molten metal and

1987-02-20

1988-07-05

Rutledge, L. Dewayne

Metallurgical apparatus

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

By means introducing treating material

29157C, 266270, C21C 548

Patent

active

047549548

ABSTRACT:
A device for bubbling gases through molten metal and specially adapted to be used in ladles or metallurgical vessels where it is necessary to stop the flow of gas without risk of penetration of liquid metal through the device. The device includes a metal casing holding a number of refractory plates or concentric cylinders that have opposed, specially roughened surfaces and that have their roughened surfaces juxtaposed without inserts or slots between them. The plates or cylinders can be roughened by controlled shot blasting to provide a plurality of randomly arranged surface discontinuities that define a plurality of unoriented flow passages when the plates or cylinders are placed in contacting, face-to-face relationship. Gas flow rates substantially greater than 5 liters per second can be obtained, and the device prevents molten metal flow therethrough when the gas flow has been cut off.

REFERENCES:
patent: 4340208 (1982-07-01), Vayssiere et al.
patent: 4378106 (1983-03-01), Hirschberg et al.
patent: 4395026 (1983-07-01), Hodl et al.

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