|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Thermodynamic Applications, Optimizations and Simulations in High-Temperature Processes: An EPD Symposium in Honor of Christopher W. Bale's 70th Birthday
||Coupled Thermodynamic and Kinetic Fundamental Simulations of Industrial Metallurgical Processes and Reactors
||L.T.I. Jonsson, M Ersson, N.Å.I. Andersson, L. Höglund, A. Tilliander, S. Du, Par Jonsson
|On-Site Speaker (Planned)
Metallurgical processes and reactors operate at high temperatures. In order to obtain a good process or reactor design it is essential to have a sound knowledge on the thermodynamic equilibriums between steel/slag, steel/inclusion, steel/refractory and steel/gas. In addition, it is also in most cases necessary to consider the kinetics of these processes. Partly this is due to that equilibrium situations never can be reached in some reactors or for some process conditions. However, maybe the major reason to consider the kinetics in combination with thermodynamics is the never ending strive to cut the production costs by producing clean steel grades during a shorter time to increase the competitiveness. This paper will report on our efforts to carry out coupled fundamental mathematical simulations of kinetics and thermodynamics during the last twenty years, with a strong emphasize that the results should be applicable for industrial conditions. Here, a fundamental model is seen as a mathematical model that consists of: i) transport equations of mass, momentum and enthalpy, ii) turbulence equations, and iii) thermodynamic equations. Results will be shown for simulations of the fluid interactions between the steel and the slag, including the importance of the viscosity on the slag movement. Thereafter, both simulations as well as verification results of the simulation in production scale experiments for refining of sulfur and hydrogen during vacuum treatment in a ladle will be discussed. In addition, the transformation of these fundamental modeling results to simplified model suitable to be used on-line in industrial production will be given. Thereafter, results from prediction of the carbon removal in a top blown iron melt as well as laboratory scale results will be discussed. Also, simulations of the carbon removal in AOD converters will be shown. Finally, some ideas for future studies of important reactors and processes will be discussed.
||Planned: TMS Journal: Metallurgical and Materials Transactions