A Heat Transfer and Solidification Model of Continuous Cast

Zhang, Qi; Yang, La Dao

doi:10.4028/www.scientific.net/AMR.154-155.1431

Paper Titles

Numerical Study of the Thermosolutal Convection Induced Macrosegregation during Columnar Solidification
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Sideways Movement of Strip in In-Plane Roll-Bending Process with Conical Rollers
p.1419

Research and Application Status of Arc Welding Heat Source Model for T-Joint Numerical Simulation
p.1423

The Steel Joint Life of the Single-Wheeled Cycle Using FEM Analysis
p.1427

A Heat Transfer and Solidification Model of Continuous Cast
p.1431

Effect of Chromium Nitride on Microstructure and Properties of Fe-Based Coating by Laser Cladding
p.1435

Review of Materials and Process Modeling Techniques for Creep Age Forming
p.1439

Comparable Study on Water Cavitation Peening and Traditional Shot Peening of Almen Strips
p.1446

Influences of Variable Friction Coefficient on the Hot Formability of Ultra High Strength Steel Sheet
p.1450

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A Heat Transfer and Solidification Model of Continuous Cast

Abstract:

A model of heat transfer and solidification of continuous cast has been established, including boundary conditions in the mold and spray zones. A finite difference method was used for the numerical simulation. The model calculates the shell thickness and temperature distributions of the slab real time. The importance effect of non-linear material properties of specific heat and thermal conductivity as well as phase changes during solidification is treated. The adequacy of model has been proved by industrial and experimental data. The model can be applied to solve some practical problems in continuous cast.

Info:

Periodical:

Advanced Materials Research (Volumes 154-155)

Main Theme:

Materials Processing Technologies

Edited by:

Zhengyi Jiang, Xianghua Liu and Jinglong Bu

Pages:

1431-1434

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.154-155.1431

Citation:

Q. Zhang and L. D. Yang, "A Heat Transfer and Solidification Model of Continuous Cast", Advanced Materials Research, Vols. 154-155, pp. 1431-1434, 2011

Online since:

October 2010

Authors:

Qi Zhang, La Dao Yang

Keywords:

Continuous Casting, Heat Transfer, Model, Solidification

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$38.00

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References

[1] B.G. Thomas, Continuous Casting: Modelling. The Encyclopedia of Advanced Materials, vol. 2, Pergamon Press/Elsevier, Oxford, UK, (2001).

[2] A.K. Tieu, I.S. Kim, Simulation of the continuous casting process by a mathematical model, Int. J. Mech. Sci. 39 (1997).

[3] J.S. Ha, J.R. Cho, B.Y. Lee, M.Y. Ha, Numerical analysis of secondary cooling and bulging in the continuous casting of slabs, J. Mater. Process. Technol. 113 (2001).

[4] B. Mochnacki, J. Suchy, Numerical Methods in Computations of Foundry Processes, Polish Foundrymen's Technical Association, Kraków, (1995).

[5] Savage J, Pritchard WH (1954) the problem of rupture of the billet in the continuous casting of steel. J Iron Steel Inst 178: 269.

[6] Davies R, Blake N, Campell P.

[1988] Solidification modeling an aid to continuous casting. Proc 4th International Conference of Continuous Casting, Brussels, p.645.

[7] J.K. Brimacombe, P.K. Agarwal, S. Hibbins, B. Prabhaker, and L.A. Baptista: Continuous Casting, ISS/AIME, Warrendale, PA, 1984, vol. 2, pp.109-23.

[8] R. M. Frand, Int. J. Heat Mass Transfer 8 (1965)995.

[9] Y.S. Touloulian, R.W. Powell, C.Y. Ho, and P.B. Klemens: Thermophysical Properties of Matter, IFI/Plenum, New York, NY, 1972, vol. 8. casting. Proc 4th International Conference of Continuous Casting, Brussels, p.645.

Paper TitlePages

Study of Heat Transfer of Steel Solidification Process

Authors: Yan Jin, Zhi Bing Tian

Abstract: Because the dynamic soft reduction of continuous casting process is based on the computation of the solidification end point, using model to simulating the steel solidificating process is more and more interesting. Especially, the influence of the heat flux to the solidification end point is needed to research thoroughly. In this paper the heat transfer model for the simulation of the solidification of steel droplet is established. The simulation reveals that the steel droplet (the radium is 7.2 mm) is solidified quickly in 4.3 seconds on water cooling copper plate, and in 3 seconds there is half of the droplet is frozen to solid. If there are materials resisting heat transfer inserted between cooling plate and liquid steel, the solidification end position would be moved to the deeper place below the shell in obvious extent, and the influence of heat flux to the ratio of mushy zone is weaker than that to solidification end point position.

3936

Effect of Particle Characteristic on Cooling Process of High Temperature Sinter

Authors: Guo Feng Lou, Zhi Wen, Xun Xiang Liu, Xin Zhang, Kun Chan Zheng

Abstract: In the paper, a 1-D unsteady mathematical model is used to analyze the cooling process of high temperature sinter. The modeling result is compared with measured data, and the agreement is good. The effect of sinter particle size and void fraction on the cooling process of the annular cooler has been investigated.

1128

Mathematical Modeling of Heat Losses in Steelmaking Ladles

Authors: Izabela Diniz Duarte, Carlos Antonio da Silva, Itavahn Alves da Silva, Eliana Rodrigues Ferreira, Varadarajan Seshadri

Abstract: The main factors that determine heat losses in a steelmaking ladle are reviewed. Controlling the temperature of the liquid steel from the primary refining until casting is essential to achieve product quality as well as energy savings. Among other objectives this study sought to assess the relative weight of heat losses to the refractory lining and the thermal losses through the slag layer. Temperature, slag thickness and properties, refractory temperature and physical properties and convection characteristics are the defining factors. Numerical integration was carried out with a computer code specifically developed for the purpose .The results show that heat loss through the refractory linings at side wall is relatively high compared to that through the bottom and slag layer, Heat loss through the double slag layer depends on temperature, slag thickness, heat transfer coefficient and time.

166

Influence of High Temperature Heat Sources on the Moisture and Temperature Distribution in a Real/Virtual Foundry Sand Mould

Authors: Paweł Popielarski, Zenon Ignaszak

Abstract: The problem described in the paper concerns the thermo-physical properties of the green mould material to which the cast iron is most often poured. The study includes the experiment of pouring the cast iron plate into green bentonite-sand mould. The temperature fields of casting and in different zones of the mould were recorded. The goal of the study was to determine the substitute thermo-physical properties of mould sand containing the over-moisture zone by means of simulation tests (inverse problem). An originality of the related research is an attempt to take into account the effects of the global thermal phenomena occurring in the quartz sand bonded by bentonite-water binder, by application of the substitute thermal coefficients without using the coupled modeling. In the simulation tests in order to achieve the effect of rapid heating of the mould (below temperatures 100 °C) by poured cast iron (T>1300 °C), the function of the latent heat source and the modified values of substitute thermal conductivity and substitute specific heat of the molding sand were used. In order to facilitate the solution, the mould was divided into zones, in which different starting humidity of molding sand was assumed.