Gas dispersion apparatus for molten aluminum refining

In an aluminum refining system adapted for the positioning of a spinning nozzle assembly in an insulated refractory lined refining chamber for the injection of sparging gas into molten aluminum present in the refining chamber during aluminum refining operations, the improvement comprising a spinning nozzle assembly having a rotor portion positioned in the insulated refractory lined refining chamber and vertical baffle means positioned at the floor of and extending across said refining chamber under the rotor portion of said spinning nozzle assembly, said baffle means being adapted to provide an open space in the vicinity of one or both side walls of the refining chamber to enable molten aluminum to pass through during draining operations and to allow debris to be scraped into one section of the floor of the refining chamber for removal during cleaning operations, whereby said baffle means serves to change the flow pattern of molten aluminum within the refining chamber upon the use thereof for refining operations so as to enable higher gas flows and/or nozzle rotating speeds to be employed without excessive surface turbulence of said molten aluminum, while facilitating draining and cleaning operations in the refining chamber.