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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium The Science of Melt Refining: An LMD Symposium in Honor of Christian Simensen and Thorvald Abel Engh
Presentation Title Modelling of Hydrogen Removal in Gas Fluxing of Molten Aluminium
Author(s) Dag Mortensen, Jinsong Hua, Arild Håkonsen, Terje Haugen, John Olav Fagerlie
On-Site Speaker (Planned) Dag Mortensen
Abstract Scope Rotary degassing is one of the most commonly used methods for removing dissolved hydrogen and solid particles from molten aluminium. In order to improve the removal efficiency of both hydrogen and inclusions together with possibly lower investment and operating cost for the degassing equipment, modelling is a method that can be applied to study the process in detail. The removal efficiency depends on bubble size distribution, level of turbulence, residence time of bubbles in the melt etc. A modelling approach is presented including multiphase flow and mass transfer of impurities between the phases dependent on the solubility of the impurities in the different phases. A finite element model is used to solve the conservation equations and the impurity transport. A detailed 3D model for the in-line Hycast I-60 SIR melt refiner unit is used and results from the modelling are compared with experimental results.
Proceedings Inclusion? Planned: Light Metals


A Holistic Approach to Molten Metal Cleanliness
Developments in Inclusion Removal Technology
Effects of 2 ppm Beryllium on the Oxidation of a 5XXX Aluminum Alloy at Temperatures between 500 °C and 750 °C
Modelling of Hydrogen Removal in Gas Fluxing of Molten Aluminium
Overview of Ultrasonic Degassing Development
Oxide Skin Strength on Molten AA5XXX Aluminum Alloy – Effect of Beryllium and Alternatives
Results of Trials with a Multi Stage Filtration System Employing a Cyclone
The Contributions of Thorvald Engh and Christian Simensen to the Science of Melt Refining
The Fundamentals of Forming Microbubbles in Liquid Metal Systems
The Use of Nitrogen to Degas Molten Aluminium - Comparison of Metallurgical Results with Argon and Nitrogen Used in an ACD™
Understanding of Interactions between Pyrolysis Gases and Liquid Aluminum and Their Impact on Dross Formation

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