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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
C-46: Precious Technology; Recycling of Titanium from Medical Implant Industry, Challenges and Opportunities
C-47: Promotion of Separation of Two Phase Liquid Metals by Applying Mechanical Vibration
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
Recycling of Oxide from Dross into Aluminum Electrolysis Cells
The Implementation of a Comprehensive Dross Management Program at Constellium Ravenswood

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