Aluminum recycling system with sustainable material management

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Aluminum dross is a by-product of aluminum melting process. In Japan, metallic aluminum in aluminum dross is recovered by physical separation, using the so-called Metal Reclamate Machine (MRM). A large amount of the aluminum dross residue containing oxides, metallic aluminum, nitrides, and chlorides is unavoidably generated. To upgrade aluminum dross residue by easier technique, the authors paid attention to the size distributions of the metallic aluminum and other materials in the residue. The purpose of this study was to clarify the relationship between the composition and the grain size of the particles in the residue. In spite of the residues being obtained from different companies, the metallic aluminum content in each residue can be increased by screening.