Gas injection pump

C - Chemistry – Metallurgy – 22 – B

Patent

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Details

C22B 9/05 (2006.01) C22B 21/06 (2006.01) F04D 7/06 (2006.01)

Patent

CA 2262108

An apparatus (1) for treating molten aluminium or zinc having a housing providing a chamber (18) for containing a molten metal (19). The chamber (18) includes an inlet opening (20) and an outlet passage (22). A rotatable impeller (12) is disposed within the chamber (18) for drawing molten metal (19) in through the inlet (20) and expelling molten metal (19) through the outlet passage (22). A convergent nozzle (25) is positioned in the outlet passage (22). A gas injection conduit (24) has an inlet in fluid communication with a source of purifying gas and an outlet in proximity to the chamber (18), and is positioned upstream of the nozzle.

La présente invention concerne un appareil (1) permettant de traiter de l'aluminium ou du zinc en fusion contenu dans un logement formant une chambre (18) pour métal en fusion (19). La chambre comporte (18) un orifice d'entrée (20) et un passage de sortie (22). Une pompe rotative (12) située dans la chambre (18) assure l'aspiration du métal en fusion (19) par l'orifice d'entrée (20) et chasse le métal en fusion (19) par le passage de sortie (22). Un gicleur à jet convergent (25) est disposé dans le passage de sortie (22). Un conduit de gazage (24), dont l'orifice d'entrée est en communication fluide avec une source de gaz purifiant, et dont l'orifice de sortie se trouve à proximité de la chambre (18), est disposé en amont du gicleur.

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