Permeable refractory material for a gas purged nozzle

B - Operations – Transporting – 22 – D

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B22D 41/54 (2006.01) B22D 41/58 (2006.01)

Patent

CA 2502311

A permeable, resin-bonded composition is described, which finds utility as a porous element in a gas-injection nozzle. The permeable composition is notably useful in a canless, resin-bonded, gas-injection nozzle, characterized by an impermeable, resin-bonded composition replaces the metal can. Advantageously, the resin-bonded compositions include an oxygen getter for scrubbing oxygen before the oxygen can reach the molten steel. A method of manufacturing the nozzle is described and includes copressing a standard, resin-bonded composition around the permeable, resin-bonded composition. The pressed piece may be cured at temperatures below about 800 ~C.

L'invention concerne une composition perméable à liaison de résine utilisée comme élément poreux dans une buse d'injection de gaz. La composition perméable est notablement utilisée dans une buse d'injection de gaz à liaison de résine sans enveloppe métallique caractérisée en ce qu'une composition imperméable à liaison de résine remplace l'enveloppe métallique. Les compositions à liaison de résine comprennent, avantageusement, un getter d'oxygène permettant de laver l'oxygène avant que celui-ci n'atteigne l'acier fondu. L'invention concerne également un procédé de fabrication de buse consistant à presser conjointement une composition normalisée à liaison de résine autour de la composition perméable à liaison de résine. La pièce pressée peut être durcie à des températures en-dessous d'environ 800 ·C.

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