A process for the circulation gas treatment of aluminum smelts with on a shaft arranged one on top of the agitating vanes

摘要

A method of gas fluxing molten aluminum with at least two, relatively small diameter upper and lower rotatable dispersers located in the molten aluminum and mounted on a shaft. Fluxing gas is added to the molten aluminum beneath each of the rotatable dispersers at a substantial rate of gas flow while rotating the dispersers at a substantial rpm in the molten aluminum. The dispersers directly shear gas bubbles that form in the molten aluminum as the fluxing gas is directed into the molten aluminum beneath each of the dispersers. The direct shearing of the gas bubbles maintains a high surface area between the bubbles and molten aluminum to effect efficient removal of impurities in the molten aluminum.