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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Cast Shop Technology: Recycling and Sustainability Joint Session
Presentation Title Behavior of Mg-Si-rich Phases in Aluminum Can Sheets and Their Impact on Metal Oxidation during Industrial Thermal Pre-treatment
Author(s) Jan Steglich, Christiane Matthies, Marcel Rosefort, Bernd Friedrich
On-Site Speaker (Planned) Jan Steglich
Abstract Scope 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.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Behavior of Mg-Si-rich Phases in Aluminum Can Sheets and Their Impact on Metal Oxidation during Industrial Thermal Pre-treatment
Dissipative Use of Critical Metals in the Aluminum Industry
Environmental Impacts of Aluminum Dross after Metal Extraction
In-situ Observation of Dross Formation during Melting of Al-Mg Alloy
Potential for Handheld Analyzer to Address Emerging Positive Material Identification (PMI) Challenges
Precious Technology; Recycling of Titanium from Medical Implant Industry, Challenges and Opportunities
Promotion of Separation of Two Phase Liquid Metals by Applying Mechanical Vibration
Recycling of Oxide from Dross into Aluminum Electrolysis Cells
The Implementation of a Comprehensive Dross Management Program at Constellium Ravenswood

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