Authors
1 Nanotechnology and advanced materials Department, Materials and Energy Research Center
2 Materials Engineering Department, Isfahan University of Technology
Abstract
Principally, fluid flow pattern in the tundish has important character during the operational conditions such as removing non-metallic inclusions and mixing control. Type of design and geometrical shape of tundish are effective parameters on fluid flow pattern of molten steel in the tundish. In this research, different designing of tundish configuration are considered for achievement to a tundish configuration with optimization of intermix and removing inclusions. With combination of different fluid control devices such as: weir, dam, baffle and turbo stopper, different configuration are suggested for tundish. Furthermore, a mathematical mixing model is designed and free parameters of the model related to each configuration of tundish are determined by a physical model of tundish with one quarter of real scale. Then, residence time distribution curve of each configuration is plotted and characterization of fluid flow pattern is investigated by the mathematical model prediction results. With comparison of RTD curves of different tundish configuration, the best case for fluid flow pattern when is used turbo stopper with a pair of dams as both maximum flotation of inclusions and minimum amount of intermix are evidenced.
Keywords
- D. Mazumdar, and R.I.L. Guthrie, "The Physical and Mathematical Modeling of Continuous Casting Tundish Systems", ISIJ International. 39 (1999) 524-547.
- J. Szekely, and O.J. Ilegbusi, "The Physical and Mathematical Modeling of Tundish Operations". New York (1988) Springer-Verlag.
- E.B. Nauman, and B.A. Baffham, "Mixing in Continuous Flow System" New York, NY, John Wiley & Sons Inc (1983).
- R. Schwarze, F. Obermeier, and D. Janke, "Numerical Simulation of Fluid Flow and Disperse Phase Behavior in Continuous Casting Tundishes", Modelling and Simulation in Materials Science and Engineering. [9] (2001) 279- 87.
- S. Sinha, K.M. Godiwalla, and C.S. Sivaramakrishnan, "Fluid Flow Characterisation in Twin Strand Continuous Casting Tundish Water Model", Ironmaking and Steelmaking. 20 [6] (1993) 485-492.
- م. علی زده، ح. ادریس و ع. شفیعی، " شبیه سازی الگوی جریان فولاد مذاب در تاندیش ریخته گری مداوری با استفاده از مدل آبی" سمپوزیوم فولاد 85، دانشگاه صنعتی امیر کبیر، 1385، ص 1001- 1010.
- مهدی علی‌زاده, , حسین ادریس و علی شفیعی, 'مدلسازی اختلاط به هنگام عملیات تغییر جنس فولاد در فرایند ریخته‌گری مداوم تختال', نشریه علمی پژوهشی استقلال، دانشگاه صنعتی اصفهان، شماره 2، اسفند 1387.
- J.H. Ferziger, and M. Peric, "Computational Methods for Fluid Dynamics". Berlin Springer (1997).
- S. Singh, and S.C. Koria, "Tundish Steel Melt Dynamics with and without Flow Modifiers through Physical Modelling", Ironmaking and Steelmaking. 23 [3] (1996) 255-262.
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