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Recent advances in the remelting process for recycling aluminium alloy chips: a critical review

Article dans une revue avec comité de lecture
Author
CHEN, Xin
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
ccBEN SAADA, Mariem
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
ccLAVISSE, BRUNO
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
ccAMMAR, Amine
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]

URI
http://hdl.handle.net/10985/26323
DOI
10.1007/s12289-025-01904-9
Date
2025-04-24
Journal
International Journal of Material Forming

Abstract

This critical review examines advances in preprocessing and remelting processes for aluminium alloy chip recycling, emphasizing pre-treatment and remelting techniques that improve both resource recovery and material quality. Pre-treatment strategies, particularly cleaning methods and compaction are critically evaluated. Various cleaning methods, including centrifugation, ultrasonic solvent washing, extraction, and distillation are compared based on their ability to remove residual cutting fluids. Cold compaction, which augments chip density to approximately 2.5 g/cm³, significantly curtails oxidation losses and enhances metal recovery. During remelting, NaCl-KCl-based fluxes with limited fluoride additions (e.g., 3–7 wt% Na₃AlF₆) disrupt oxide networks but require careful dosage control to minimize furnace corrosion and environmental hazards. Moreover, mechanical stirring combined with suitable melting temperatures reduces porosity while enhancing melt purity. Future research should prioritize the development of low-energy cleaning methods, flux composition optimization, and scalable production techniques to further advance sustainable aluminium recycling.

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