Фундаментальные и прикладные проблемы черной металлургии

DOI: 10.52150/2522-9117-2024-38-308-320

Shvets Oleksandr Volodymyrovych, Ph. D. (Tech.), Senior Researcher, Department of “Metal Forming”, Dnipro Metallurgical Institute, Ukrainian State University of Science and Technologies, Lazariana St., 2, Dnipro, 49010, Ukraine. ORCID: 0009-0005-4871-4402. Email: a_shvets@ua.fm

Konovodov Dmytro Volodymyrovych, Ph. D. (Tech.), Associate Professor, Department of “Metal Forming”, Dnipro Metallurgical Institute, Ukrainian State University of Science and Technologies, Lazariana St., 2, Dnipro, 49010, Ukraine. ORCID: 0000-0001-8282-4991. Email: d.v.konovodov@ust.edu.ua

Petrov Oleksandr Dmytrovych, Ph. D. (Tech.), Leading Specialist of R&D Department, LLC “INTERPIPE UKRAINE”, Pisarzhevskogo St., 1A, Dnipro, 49005, Ukraine. ORCIR: 0000-0001-8688-043X. Email: apff67@gmail.com

Lisnycha Tetiana Yevhenivna, Specialist of R&D Department, LLC “INTERPIPE UKRAINE”, Pisarzhevskogo St., 1A, Dnipro, 49005, Ukraine. ORCID: 0009-0004-2224-2622. Email: tetlis777@gmail.com

IMPROVING THE DESIGN OF THE TUNDISH OF THE CONTINUOUS CASTING MACHINE FOR ROUND BILLETS PRODUCTION USING NUMERICAL SIMULATION

Abstract. As the requirements to fineness of continuously cast round billets used in manufacture of critical products (railway wheels, special purpose pipes, etc.) demonstrate substantial growth, comprehensive technological solutions are needed to improve the quality of steel, primarily by reducing the number and size of non-metallic inclusions. Herewith, the tundish as the last unit with refractory lining plays a special role in this by removing inclusions through optimization of the liquid steel flows. Since the metal flow pattern is the basic component for productivity of continuous casting tundishes, the purpose of this study was to evaluate and optimize the hydrodynamics inside the four-strand tundish by using a comprehensive approach to changing its internal geometry. To ensure optimal conditions for removal of non-metallic inclusions in the tundish, it is necessary first of all to ensure long-term contact of metal and slag both by directing the metal flows to the metal-slag interface surface and by increasing the time of metal staying in the tundish. In regulation of the metal flows inside the tundish the main focus has been historically on the design and technological features of the impact pads in the zone of metal inflow from the steel ladle to reduce turbulent flows. Therefore, in the conducted studies, the attention was mainly paid to evaluating changes in the liquid steel flows inside the tundish through the use of other additional flow “modifiers” such as skimmers and baffles. It should be noted that in addition to the effect on the distribution of flows, an assessment was made of the possible impact of changes on prevention of excessive erosion of the refractory lining of the tundish. The evaluation was performed using the finite element numerical simulation method on the commercial software Thercast from Transvalor (France). The results of the actual evaluation of non-metallic inclusions in the finished products showed a substantial reduction in the interval of the existing inclusions from the initial 50-100 microns to 20-50 microns, with a stable trend towards a substantial decrease in the number of inclusions after the changes were implemented.

Key words: tundish, numerical simulation, skimmer, flow rate, non-metallic inclusions.

DOI: https://doi.org/10.52150/2522-9117-2024-38-308-320

For citation: Shvets, O. V., Konovodov, D. V., Petrov, O.D., & Lisnycha, T. Y. (2024). Improving the design of the tundish of the continuous casting machine for round billets production using numerical simulation. Fundamental and applied problems of ferrous metallurgy, 38, 308-320. https://doi.org/10.52150/2522-9117-2024-38-308-320

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