In the framework of a collaborative program on recycling, the purification of molten aluminum has been studied. In particular, the removal of elements like Fe, Mn and Si was targeted. One approach is to capture the element to remove in an intermetallic particle, which has subsequently to be removed. This paper reports on the removal of a large amount of deliberately created intermetallic particles (also called primary particles) from a molten aluminum bath. Several techniques have been considered in the work, including filtration, centrifugation, gravity separation, flotation. The applicability of these techniques is discussed, based on the experimental work that has been carried out. The model system used for the work reported is Al-Fe-Mn. This work has been funded within the Growth program of the European commission under the grant number G1RD-CT-2002-00728.
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