Publication detail

A numerical optimization of concast steel slab and influence of the material thermophysical proprerties

KAVIČKA, F., ŠTĚTINA, J., SEKANINA, B., HEGER, J.

Original Title

A numerical optimization of concast steel slab and influence of the material thermophysical proprerties

Type

conference paper

Language

English

Original Abstract

The thermophysical properties of steels have a significant influence on the actual concasting process and on the accuracy of its numerical simulation and optimization. The determination of these properties (heat conductivity, specific heat capacity and density in the solid and liquid states) often requires more time than the actual numerical calculation of the temperature fields of a continuously cast steel billet, cylinder or slab. The influence of individual properties should be neither under- nor over-estimated. Therefore, an analysis/parametric study of these thermophysical properties was conducted. The order of importance within the actual process and the accuracy of simulation and optimization were also determined. Individual properties, which, in some cases, were obtained from tables and in others experimentally, were substituted by an approximation using orthogonal polynomials. The accuracy of each polynomial is dependent on the precision of individual values. The order of significance of individual thermophysical properties was determined with respect to the technological length and the minimum thickness of the solidified shell of the steel at the exit of the crystallizer. The analysis was performed by means of a so-called calculation experiment, i.e. by means of the original and universal numerical concasting model developed by the authors of this paper. The influence of each property has been studied separately within the range from 50 to 150% of its real value and also illustrated graphically. It is convenient to conduct such an analysis in order to facilitate the simulation of each individual case of concasting, thus enhancing the process of optimization.

Key words in English

thermophysical properties of steels. accuracy of simulation, calculation experiment, universal numerical concasting model

Authors

KAVIČKA, F., ŠTĚTINA, J., SEKANINA, B., HEGER, J.

RIV year

2001

Released

1. 10. 2001

Publisher

Nakl. Ing. Jan Novosad, Procesní inženýrství, Praha

Location

Praha

ISBN

80-86059-32-4

Book

CHISA 2001 Sborník 1

Pages from

144

Pages to

149

Pages count

6

BibTex

@inproceedings{BUT5966,
  author="František {Kavička} and Josef {Štětina} and Bohumil {Sekanina} and Jaromír {Heger}",
  title="A numerical optimization of concast steel slab and influence of the material thermophysical proprerties",
  booktitle="CHISA 2001 Sborník 1",
  year="2001",
  pages="6",
  publisher="Nakl. Ing. Jan Novosad, Procesní inženýrství, Praha",
  address="Praha",
  isbn="80-86059-32-4"
}