Publication detail

Comparison of optimization-regulation algorithms for secondary cooling in continuous steel casting

BŘEZINA, M. MAUDER, T. KLIMEŠ, L. ŠTĚTINA, J.

Original Title

Comparison of optimization-regulation algorithms for secondary cooling in continuous steel casting

Type

journal article in Web of Science

Language

English

Original Abstract

The paper presents the comparison of optimization-regulation algorithms applied to secondary cooling zone in continuous steel casting where the semi-product withdraws most of its thermal energy. In steel production, requirements towards obtaining defect-free semi-products are in-creasing day by day and the products, which would satisfy requirements of the consumers a few decades ago, are now far below the minimum required quality. To fulfill the quality demands towards minimum occurrence of defects in secondary cooling as possible, some regulation in the casting process is needed. The main concept of this paper is to analyze and compare the most known metaheuristic optimization approaches applied to the continuous steel casting process. Heat transfer and solidification phenomena are solved by using a fast 2.5D slice numerical model. The objective function is set to minimize the surface temperature differences in secondary cooling zones between calculated and targeted surface temperatures by suitable water flow rates through cooling nozzles. Obtained optimization results are discussed and the most suitable algorithm for this type of optimization problem is identified. Temperature deviations and cooling water flow rates in secondary cooling zone together with convergence rate and operation times needed to reach the stop criterium for each optimization approach are analysed and compared to target casting conditions based on a required temperature distribution of the strand. The paper also contains a brief description of applied heuristic algorithms. Some of the algorithms exhibited faster convergence rate than others, but the optimal solution was reached in every optimization run by only one algorithm.

Keywords

continuous casting; secondary cooling; numerical modeling; thermal-solidification model; heu-ristic optimization

Authors

BŘEZINA, M.; MAUDER, T.; KLIMEŠ, L.; ŠTĚTINA, J.

Released

1. 2. 2021

Publisher

MDPI

ISBN

2075-4701

Periodical

Metals

Year of study

11

Number

2

State

Swiss Confederation

Pages from

1

Pages to

19

Pages count

19

URL

https://www.mdpi.com/2075-4701/11/2/237

Full text in the Digital Library

http://hdl.handle.net/11012/196750

BibTex

@article{BUT168277,
  author="Michal {Březina} and Tomáš {Mauder} and Lubomír {Klimeš} and Josef {Štětina}",
  title="Comparison of optimization-regulation algorithms for secondary cooling in continuous steel casting",
  journal="Metals",
  year="2021",
  volume="11",
  number="2",
  pages="1--19",
  doi="10.3390/met11020237",
  issn="2075-4701",
  url="https://www.mdpi.com/2075-4701/11/2/237"
}