| 摘要 |
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.
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