DOI: 10.52150/2522-9117-2026-40-021
V. V. Bochka1, D. Sc. (Tech.), Prof., ORCID 0000-0002-4935-0779
K. H. Niziaiev1, D. Sc. (Tech.), Prof., ORCID 0000-0002-9260-0964
М. V. Yaholnyk1,*, Ph. D., Assoc. Prof., ORCID 0000-0003-2686-8601
K. V. Shmat1, Assistant
M. M. Oleksiienko1, Ph. D. Student
О. І. Babenko1, Student
1 Ukrainian State University of Science and Technologies
* Corresponding author: m.v.yaholnyk@ust.edu.ua
RESEARCH OF THE FEATURES OF THE CHARGING MOVEMENT IN A CONELESS CHARGING DEVICE OF A TRAY-TYPE
Abstract. The article considers the features of the motion of charge materials in a coneless charging device (CCD) of a tray-type blast furnace and their influence on the formation of the distribution of materials in the top. The relevance of the work is due to the insufficient study of the patterns of particle motion both along the tray and after their descent in the volume of the furnace, which significantly affects the efficiency of the blast furnace process. To solve the problem, an improved mathematical model was used that describes the trajectory of motion of an individual particle taking into account the action of gravitational forces, friction, angular velocity of rotation of the tray and other factors. The solution of the system of differential equations was carried out by the numerical Runge–Kutta method, which allowed obtaining reliable dependences of particle motion in time and space. Based on the calculations, the influence of the main technological and design parameters was investigated, in particular the inclination angle and rotation speed of the tray, the granulometric composition of the materials, the initial velocity of the particles, the place of their fall on the tray, as well as the velocity of the gas flow in the top. It was shown that the determining factor of the radial distribution of the charge is the inclination angle of the tray, the change of which leads to a significant movement of the ridge of materials from the walls to the center of the furnace. The influence of the rotation speed of the tray turned out to be less significant and depends on the value of the inclination angle. It was established that the type of material and its granulometric composition only slightly affect the position of the ridge, which allows the use of generalized dependencies for different components of the charge. Special attention was paid to the analysis of the non-axial fall of materials onto the tray, which leads to the emergence of radial asymmetry and circumferential unevenness of the charge distribution. It was shown that this factor can significantly change the position of the ridge and the conditions of loading the furnace. It was also established that the influence of the lifting force of the gas flow during the operation of the blast furnace is insignificant and may not be taken into account in engineering calculations. The influence of the design features of the tray suspension, in particular changes in its active length and radius of rotation, on the trajectory of particle movement and the nature of the distribution of materials in the furnace was investigated. As a result of the conducted studies, the adequacy of the proposed mathematical model was confirmed and the possibility of its use for optimizing the operating modes of coneless loading devices was substantiated. The obtained dependencies allow a more reasonable approach to the selection of loading parameters, to increase the uniformity of the distribution of materials in the blast furnace and the efficiency of the pig iron smelting process.
Key words: blast furnace, coneless loading device, tray distributor, mathematical model, charge distribution, trajectory of movement.
For citation: Bochka, V. V., Niziaiev, K. H., Yaholnyk, M. V., Shmat, K. V., Oleksiienko, M. M., & Babenko, О. І. (2026). Research of the features of the charging movement in a coneless charging device of a tray-type. Fundamental and applied problems of ferrous metallurgy, 40, 332-348. https://doi.org/10.52150/2522-9117-2026-40-021
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Рукопис надійшов до редакції / Received 01.03.2026
Рекомендовано до друку / Accepted 28.05.2026
Опубліковано / Published 30.05.2026
