|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||The Science of Melt Refining: An LMD Symposium in Honor of Christian Simensen and Thorvald Abel Engh
||Understanding of Interactions between Pyrolysis Gases and Liquid Aluminum and Their Impact on Dross Formation
||Regina Dittrich, Bernd Friedrich, Georg Rombach, Jan Steglich, Anne Pichat
|On-Site Speaker (Planned)
Organic contaminated aluminum scraps have to be recycled in an economical, effective and ecological way. It is state of the art to remove organic coating by thermal pre-treatment under reduced oxygen atmosphere, which can be achieved in multi chamber furnaces. If the organic coating is not removed completely during pre-treatment, gasification can continue while the scrap is submerged into the melt. Subsequently, undesirable gas-melt reactions cause an increase of dross formation and a decrease of metal recovery. This work aims to improve the understanding of interactions between pyrolysis gases and liquid aluminum to reduce oxidation losses. Experiments were performed in a lab-scale furnace with injection of pyrolysis gases into molten aluminum. Thermochemical calculations, off-gas analytics and dross structure analysis were performed to support the evaluation of the experimental findings. The paper presents qualitative and quantitative results on the impact of reactive gases on oxidation of aluminum melts.
||Planned: Light Metals