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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Cast Shop Technology: Recycling and Sustainability Joint Session
Presentation Title Dross Formation Mechanisms of Thermally Pre-treated Used Beverage Can Scrap Bales with Different Density
Author(s) Jan Steglich, Regina Dittrich, Georg Rombach, Marcel Rosefort, Bernd Friedrich, Anne Pichat
On-Site Speaker (Planned) Jan Steglich
Abstract Scope Used beverage can scrap (UBC) bales can be remelted in state of the art multi-chamber furnaces. Following the recycling of baled UBC scrap in multi-chamber furnaces, a laboratory scale process route was developed for thermal pre-treatment and submerged melting of the scrap. In the present work, UBC scrap types with different density and level of contamination are compared. The scrap types were thermally pre-treated in different atmospheres up to 550 C and subsequently melted by submerging in a salt-free laboratory process. Melting was performed in pure aluminium at 750 C under protective argon atmosphere to exclude the influence of thermolysis gases and air. The impact of remaining organic contamination and oxidation products after thermal pre-treatment on dross formation were described. Results of SEM EDX analysis, as well as thermochemical calculations, were used to explain reactions between solid scrap and the liquid aluminium melt to improve recycling efficiency.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Centrifugal Casting of Al-Si Scrap
Dross Formation Mechanisms of Thermally Pre-treated Used Beverage Can Scrap Bales with Different Density
Improved Recyclability of Cast Al-alloys by Engineering β-Al9Fe2Si2 Phase
Influence of Coating and De-coating on the Coalescence of Aluminium Drops in Salt
The Scale-up of High Shear Processing for the Purification of Recycled Molten Scrap Aluminium Alloy: Key Features of Fluid Flow
Tramp Element Accumulation and Its Effects on Secondary Phase Particles

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