| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cast Shop Technology
|
| Presentation Title |
Compaction of Aluminium Foil and Its Effect on Oxidation and Recycling Yield |
| Author(s) |
Alicia Vallejo Olivares, Harald Philipson, Mertol Gökelma, Hans J. Roven, Trond Furu, Anne Kvithyld, Gabriella Tranell |
| On-Site Speaker (Planned) |
Alicia Vallejo Olivares |
| Abstract Scope |
Improving the circularity of aluminium is vital to meet current environmental and resource efficiency goals. One of the main challenges when recycling aluminium is its oxidation and consequent loss during re-melting. This problem is critical for the thin sheet/foil materials used for food packaging applications. Compacting the scrap into briquettes before re-melting may partly reduce such losses in addition to facilitate transport and storage.
Shredded aluminium sheets of different thicknesses (15-300 µm) were compacted into briquettes by uniaxial pressure or moderate-pressure torsion. A sub-set was subsequently oxidized at 650 °C, while a sub-set was left untreated. Finally, both briquettes and loose shreddings were re-melted under molten protective salt flux. Higher bulk density and reduced specific surface area resulted in increased coalescence and yield for the oxidized thinner foil, but did not significantly affect the metal yield of the thicker sheets and the extent of briquette oxidation. |
| Proceedings Inclusion? |
Planned: Light Metals |