|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Cast Shop Technology: Recycling and Sustainability Joint Session
||Behavior of Mg-Si-rich Phases in Aluminum Can Sheets and Their Impact on Metal Oxidation during Industrial Thermal Pre-treatment
||Jan Steglich, Christiane Matthies, Marcel Rosefort, Bernd Friedrich
|On-Site Speaker (Planned)
Aluminium beverage can recycling is a combined process of de-coating and submerged melting. The de-coating temperature varies in industrial processes and is often chosen higher than required for coating removal in order to maximize metal production.
Isothermal annealing experiments with EN AW-5182 and EN AW-3104 can sheets were performed to investigate the influence of Mg-Si rich phases on oxidation during pre-treatment. A discrete change from diffusion to liquid metal transport is observed after which extensive oxidation starts immediately. SEM EDX analysis were used to trace the transport mechanisms starting at solid Mg-Si phases. The transport mechanism was verified with thermochemical calculations. A maximum pre-treatment temperature of 833 K (1040 °F) is derived, reducing the process temperature range. Finally, the results were applied to industrial UBC remelting processes to maximize metal yield and minimize metal loss.
||Planned: Light Metals