Met. litʹe Ukr., 2021, Tom 29, №1, P. 20-25
O.M. Smirnov1, Dr. Sci. (Engin.), Professor, Head of the Department, e-mail: email@example.com, https://orcid.org/0000-0001-5247-3908, Web of Science ResearcherID: N-1890-2017
O.P. Verzilov1, PhD (Engin.), Senior Research Scientist, e-mail: firstname.lastname@example.org, https://orcid.org/0000-0003-0463-5006
A.V. Kravchenko2, Engineer, e-mail: email@example.com
Yu.O. Smirnov1, PhD in Economics, Associate Professor, Senior Research Scientist,e-mail: firstname.lastname@example.org
A.Yu. Semenko1, PhD (Engin.), Researcher, e-mail: email@example.com, https://orcid.org/0000-0002-0448-1636
D.I. Hoida1, Junior Researcher, e-mail: firstname.lastname@example.org, https://orcid.org/0000-0002-4318-3084
1Physico-technological Institute of Metals and Alloys of the NAS of Ukraine (Kyiv, Ukraine)
2Calderys Ukraine LLC (urban-type settlement Volodymyrivka, Ukraine)
The research presented in this paper is aimed at choosing the optimal geometric shape of the tundish box, which must meet the conditions of work in a single-flow tundish with continuous or semi-continuous casting of high-grade or bloom billets in small metallurgical micro-mills.
The experiments based on the establishment of a hydrodynamic pattern of metal leakage in the tundish, performed on a physical cold model, were based on the following options: without tundish box (№ 1), asymmetric tundish box with low side, deployed towards the dispenser glass (№ 2), asymmetric tundish box with a low side, deployed in the direction of the nearest narrow wall (№ 3), asymmetric tundish box without side, also deployed in the direction of a narrow wall (№ 4). The best results were shown by broom tundish box deployed towards the nearest narrow wall. But it should be noted that the impact of convective and circulating flows on the lining in this area needs further research.
An attempt was also made to establish the time of flow of the local volume of liquid from the potentially dead zone, which was in the extreme right 1/4 volume of the tundish in the area of the left 1/4 volume of the tundish, which is the beaker. To do this, colored ink was fed to the area of the right 1/4 for all investigated variants and the time was determined until the first colored streams reach the left narrow wall of the tundish. As a result, the flow time of the liquid in the tundish without a tundish box was 40 seconds, and in similar experiments using a tundish box "turbostop" design № 2 – 50 seconds; № 3 – 45 seconds; № 4 – 30 seconds. It is concluded that the presence of a stagnant zone between the tundish box and the right narrow wall of the tundish increases the time of flow of metal into the zone of the tundish nozzle by an average of 35–60 %.
Keywords: Steel casting, tundish, tundish box, flow motion, heat insulating mixture, non-metallic inclusions.
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