Abstract
The removal of solid particles from molten aluminum by flotation was investigated based on theoretical fluid dynamics. The energy spent for stirring the melt in the SNIF process accelerates the agglomeration of small particles into larger particle aggregates which can be removed from the metal by gas bubbles during the short residence time of the melt in the refining unit. Theory suggests that supplementation of thermal agglomeration of the particles with turbulent agglomeration and small gas bubbles are the major factors which can lead to high particle collection efficiencies in molten aluminum.
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