DOI: 10.52150/2522-9117-2024-38-672-685

Povorotnii Viktor Volodymyrovych, Ph. D.(Tech.), Ukrainian State University of Science and Technologies, Lazaryana St., 2, Dnipro, 49010, Ukraine. E-mail: vicktorpovar@gmail.com. ORCID: 0009-0000-9128-902X

Tolstikov Heorhii Ivanovych, Ph. D. (Tech.),Associate Professor, Department of industrial mechanical engineering, Ukrainian State University of Science and Technologies, Lazaryana St., 2, Dnipro, 49010, Ukraine.

Tolstikov Ivan Heorhiiovych, Ukrainian State University of Science and Technologies, Lazaryana St., 2, Dnipro, 49010, Ukraine.

Yaichuk Oleksandr Oleksiiovych, Ukrainian State University of Science and Technologies, Lazaryana St., 2, Dnipro, 49010, Ukraine. ORCID: 0009-0009-4034-4266

SOME FEATURES OF MODELING THE RESEARCH PROCESS THERMO-STRESSED BOWL FOR LIQUID SLAG TRANSPORTATION

Abstract. As is known, in metallurgical shops of blast furnace and steelmaking processes, slag carriers are used to drain slag and transport it. The main and most expensive part of a slag carrier is the bowl, which is a steel casting in the form of a thick-walled shell of various configurations. Currently, in blast furnace shops, the most widely used bowls are 16 m³ in volume, based on frames with carriages and moved by biaxial railway-type undercarriages. At the same time, automobile-type slag carriers carrying one bowl began to be introduced at metallurgical enterprises. The average service life of the bowls is insignificant and on average it is 500-1000 fillings, depending on the chemical composition of the slag, its temperature and a number of other factors. The main reasons for the failure of slag bowls are changes in their shape during operation, expressed in the formation of an annular or local narrowing in the area of the support ring, as well as the appearance of longitudinal and transverse cracks in the walls. Automotive-type bowls last much less due to the frequent failure of the axles, by means of which the axle is mounted on the body of the slag carrier. The above defects appear as a result of cyclic thermal effects caused by natural technological processes in the operation of slag carriers. In a solid body, uneven thermal expansion cannot occur freely and causes thermal stresses, which, in combination with mechanical ones from external forces, can cause significant plastic deformations, leading to complete or progressive destruction of the structure. Knowledge of the magnitude and nature of the distribution of thermal stresses is necessary for a comprehensive analysis of the strength of the structure, and in-depth studies of the thermally stressed state of bowls during their operation will make it possible to develop and adopt engineering solutions to increase their service life.

Key words: slag bowl, thermal stress, deformation, temperature, thermal resistance.

DOI: https://doi.org/10.52150/2522-9117-2024-38-672-685

For citation: Povorotny, V. V., Tolstikov, H. I., Tolstikov, I. H., & Yaichuk, O. O. (2024). Some features of modeling the research process thermo-stressed bowl for liquid slag transportation. Fundamental and applied problems of ferrous metallurgy, 38, 672-685. https://doi.org/10.52150/2522-9117-2024-38-672-685

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