C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 9/05 (2006.01) B01F 3/04 (2006.01) C21C 5/48 (2006.01) C22B 21/06 (2006.01)
Patent
CA 2372065
A device for injecting gas bubbles into a liquid metal (3, 23) contained in a treatment volume, preferably a treatment vessel, a circulation chute for liquid metal or an oven. The inventive device comprises at least one static inert-material injection part (1, 21) (1, 21) provided with a plurality of orifices (2, 22) and the material and/or lay-out of said orifices are such that the ratio between the diameter of the contact surface between each emitted bubble and the material at the exit of the orifice (2,22) on the diameter of said orifice, or the expansion ratio, is less than 5, preferably 3 or more advantageously 1.5 at the time when the bubble is detached from the material.
Dispositif d'injection de bulles de gaz dans un métal liquide (3, 23) contenu dans un volume de traitement, de préférence une cuve de traitement, une goulotte de circulation du métal liquide ou un four, ledit dispositif comprenant au moins une pièce statique (1, 21) d'injection en matériau inerte, ladite pièce statique (1, 21) comportant une pluralité d'orifices (2, 22) et le matériau et/ou l'implantation des orifices étant tels que le rapport du diamètre de la surface de contact entre chaque bulle émise et ledit matériau à la sortie de l'orifice (2, 22) sur le diamètre de l'orifice, ou rapport d'étalement, est inférieur à 5, de préférence à 3 ou plus avantageusement à 1,5, au moment où ladite bulle se détache du matériau.
Allibert Michel
Bertherat Marc
Le Brun Pierre
Lescuyer Herve
Aluminium Pechiney
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Pechiney Rhenalu
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