Gas purged nozzle

B - Operations – Transporting – 22 – D

Patent

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Details

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

Patent

CA 2497298

A nozzle (1) is described for delivering a flow of liquid metal from a metallurgical vessel. In combination with inert gas, the nozzle can shield the flow of liquid metal from oxygen and, additionally, can be used to purge liquid metal residing in the metallurgical vessel. The nozzle includes a substantially gas-impermeable liner (9) surrounded by a permeable composition (10). The gas-impermeable liner may comprise a resin-bonded material, and the permeable liner is preferably a carbon-bonded or castable refractory. A metal housing (14) may surround the nozzle.

La présente invention concerne une buse (1) permettant de distribuer un flux de métal liquide à partir d'un convertisseur métallurgique. Combinée à du gaz inerte, la buse peut protéger le flux de métal liquide de l'oxygène et, de plus, elle peut être utilisée pour purger le métal liquide résidant dans le convertisseur métallurgique. La buse comprend une chemise (9) sensiblement imperméable au gaz entourée d'une composition perméable (10). La chemise imperméable au gaz peut comprendre un matériau lié par la résine et la chemise perméable est de préférence un matériau réfractaire lié au carbone ou un matériau réfractaire coulable. Une enveloppe métallique (14) peut entourer la buse.

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