Energy Materials 2017: Energy and Environmental Issues in Materials Manufacturing and Processing: Opportunities in Aluminum Production, Waste Heat and Water Recovery
Sponsored by: Chinese Society for Metals, TMS: Recycling and Environmental Technologies Committee
Program Organizers: Subodh Das, Phinix,LLC; Zhancheng Guo, University of Science and Technology Beijing; Minfang Han, China University of Mining and Technology, Beijing; Teruhisa Horita, AIST; Elsa Olivetti, Massachusetts Institute of Tech; Xingbo Liu, West Virginia Univ

Tuesday 2:00 PM
February 28, 2017
Room: 14B
Location: San Diego Convention Ctr

Session Chair: Elsa Olivetti, MIT

2:00 PM  
Numerical Approach for the Implementation of the Interaction of Pyrolysis Gases and Combustion Products in an Aluminium Melting Furnace: Rukiye Gültekin1; Antje Rückert1; Herbert Pfeifer1; 1IOB RWTH University
     Within the scope of the project P5 of the AMAP (Advanced Metals And Processes) research cluster in Aachen a virtual remelting furnace is set up as a CFD (Computational Fluid Dynamics) simulation to investigate the resource and energy efficiency of the aluminium recycling process in melting furnaces. During the melting process of aluminium scrap (e.g. used beverage cans) a reactive flow has got a major impact on the heat transfer to the load. Thereby it is mostly dominated by gas combustion due to the heating burners in the furnace and pyrolysis/ thermolysis reaction caused by organic contamination of the charge. Obtaining more understanding of the underlying mechanisms is imperative for improving the performance of the melting and combustion process and in preservation of the equipment. In the present work, numerical simulations were carried out using the commercial software FLUENT for generating a helpful tool in evaluating operational conditions. The main perspective is to analyse the relevant operational conditions inside an aluminium melting furnace employing methane oxygen burner which is capable to run in the flameless combustion mode. To overcome the obstacle of simulating highly diluted combustion occurrence proved detailed chemistry model is involved. Another important aspect is to evaluate additional in house written codes for the evaporation and gas release due to contaminated input material. The subject of the investigation is the numerical simulation of the heating and holding process sequence as a steady state process.

2:20 PM  
Approach for Pyrolysis Gas Release Modelling and its Potential for Enhanced Energy Efficiency of Aluminium Remelting Furnaces: Henning Bruns1; Antje Rückert1; Herbert Pfeifer1; 1RWTH Aachen University
    Within the scope of the AMAP research cluster in Aachen the aluminium recycling process in melting furnaces is investigated with regard to resource and energy efficiency. When organic-contaminated material is charged into the furnace, pyrolysis gases are released as soon as the material temperature exceeds 350 °C (662 °F). Those gases mainly consist of hydrocarbons, hydrogen and small fractions of other species. Thus, they are an energetic contribution to the furnace atmosphere and should be considered as such by the burner control unit in order to reduce the amount of unburnt fuel in the off-gas as well as primary energy consumption. This is achieved by post-processing data from lab-scale pyrolysis experiments in MatLab and bringing it into a format suitable for CFD and maybe also online process control tools. This presentation will give an insight into the modelling approach and the model application in ANSYS Fluent CFD.