Low porosity-high density radial burst refractory plug with cons

Details Low porosity-high density radial burst refractory plug with cons Low porosity-high density radial burst refractory plug with cons

1991-08-13

1992-10-20

Kastler, Scott

Metallurgical apparatus

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

By means introducing treating material

266217, 266265, C21C 532

Patent

active

051568012

ABSTRACT:
Apparatus including a nozzle or refractory pipe lance for the secondary refinement of a bath of molten metal by the injection of a gas under pressure, having one or more low porosity-high density refractory plugs which contain apertures of constant diameter, at least those about the perimeter of the plugs having an arcuate shape. For the manufacture of a pipe lance, the lower porosity-high density refractory plugs are attached to a central tube. The low porosity-high density of the refractory plugs provides a corrosion resistance to any change in the diameter of the gas nozzles and thereby produces a controlled high velocity radial burst gas stream. Generating the radial burst of small bubbles and maintaining the gas velocity of a high constant rate reduces erosion of the refractory material around the tope of the apparatus and extends the lifetime of the pipe lance or nozzle. As progressive refractory wear proceeds during the useful life of the pipe lance, the gas flow rate will remain constant within a closed system.

REFERENCES:
patent: 4326701 (1982-04-01), Hayden, Jr. et al.
patent: 4376868 (1983-01-01), Bloom et al.
patent: 4535975 (1985-08-01), Buhrmann et al.
patent: 4783058 (1988-11-01), Peri

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