Recycling of Aluminum from Aluminum Food Tubes

Bao, Sarina; Kvithyld, Anne; Bjørlykke, Gry Aletta; Sandaunet, Kurt

doi:10.1007/978-3-031-22532-1_128

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Decreasing the dross and salt slag residue quantities would be highly beneficial for the costs and environmental impacts of recycling. The presence of organic contamination on the scrap, as shown in [6,14,15], has a significant impact.…”

Section: Introductionmentioning

confidence: 99%

Effects of Compaction and Thermal Pre-treatments on Generation of Dross and Off-Gases in Aluminium Recycling

Vallejo-Olivares,

Gertjegerdes,

Høgåsen

et al. 2023

J. Sustain. Metall.

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Organic coatings are a challenge for aluminium packaging recycling since they tend to increase the re-melting metal losses. A solution is de-coating the scrap via a thermal pre-treatment to burn-off the organics before re-melting. Due to logistic benefits, the scrap is often pressed into bales. This study evaluates the influence of compaction on the de-coating efficiency and off-gas emissions, and its consequences for dross formation and recycling metal yield. Loose chips and two types of briquettes, one loosely compacted by uniaxial pressure and the other compacted by moderated-pressure-torsion to higher densities, were heated to 550 °C while analysing the off-gas emissions using FTIR. The briquettes were subsequently re-melted into a molten heel. Re-melting coated scrap multiplied the % wt of dross by a factor of 2 or 3, depending on the compaction pre-treatment, compared to re-melting uncoated aluminium. The densest briquettes emitted less than half the CO2 and CO gases during de-coating and formed significantly more dross. Compaction to the lower densities showed no tangible effects. The effect of de-coating compacted materials or not was small (± 2% wt dross), which was attributed to carbonaceous residues remaining after the thermal treatment. In conclusion, high compactions by torsion limit the de-coating reactions, which depend on factors such as temperature and gas transport. A complete removal of the organic residues is critical for a more sustainable recycling with less dross generated. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Effects of Compaction and Thermal Pre-treatments on Generation of Dross and Off-Gases in Aluminium Recycling

Vallejo-Olivares,

Gertjegerdes,

Høgåsen

et al. 2023

J. Sustain. Metall.

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Advancements in surface treatments for aluminum alloys in sports equipment

Chen

2024

Reviews on Advanced Materials Science

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This review examines recent advancements in surface treatment technologies for aluminum alloys used in sports equipment. We discuss conventional methods like chemical conversion coatings and anodizing, as well as emerging techniques such as plasma electrolytic oxidation, physical vapor deposition, and laser surface modification. The replacement of toxic hexavalent chromium with eco-friendly alternatives is highlighted as a key development. We also explore the potential of smart, self-healing coatings to extend equipment lifespan. Our analysis reveals that while significant progress has been made in enhancing corrosion resistance and mechanical properties, challenges remain in scaling up advanced treatments for industrial implementation. The review concludes that continued innovation in surface treatments will be crucial for improving the performance, safety, and sustainability of aluminum alloys in sports applications, ultimately benefiting athletes and manufacturers alike.

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Recycling of Aluminum from Aluminum Food Tubes

Cited by 2 publications

References 6 publications

Effects of Compaction and Thermal Pre-treatments on Generation of Dross and Off-Gases in Aluminium Recycling

Effects of Compaction and Thermal Pre-treatments on Generation of Dross and Off-Gases in Aluminium Recycling

Advancements in surface treatments for aluminum alloys in sports equipment

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