Факультет дизайну машин та захисту довкілля (ДМетІ)

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http://crust.ust.edu.ua/handle/123456789/14589
ENG: Faculty of Machine Design and Environmental Protection (DMetI)
Dnipro Metallurgical Institute

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Browsing Факультет дизайну машин та захисту довкілля (ДМетІ) by Author "Bembenek, Michał"

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    Modelling of the Fine-Grained Materials Briquetting Process in a Roller Press with the Discrete Element Method
    (MDPI, Basel, Switzerland, 2022) Bembenek, Michał; Buczak, Magdalena; Baiul, Kostiantyn V.
    ENG: By using the Altair® EDEM ™ software, which implements the discrete element method, modelling and further study of the processes occurring in the roller press’s deformation area were carried out. It was shown that the discrete element method makes it possible to accurately describe the phenomena occurring in the area of roller press deformation compared with the finite element method. Models of material compaction in a roller press are developed using calcium hydroxide (slaked lime) and copper ore concentrate. The developed model makes it possible to determine the process’s energy parameters and the material’s compaction characteristics, taking into account the characteristics of its constituent particles. It was shown that discrete element modelling could be used effectively to create roller presses that provide rational characteristics of the briquetting process, taking into account the properties of the material being briquetted and the operating modes of the equipment. The results of the studies provided the basis for the applicability of the development of the discrete element method for describing the phenomena occurring in roller presses and accelerating the design of press equipment and briquetting technological processes.
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    A Novel Approach to the Screw Feeder Design to Improve the Reliability of Briquetting Process in the Roller Press
    (Polskie Naukowo- Techniczne Towarzystwo Eksploatacyjne, 2023) Baiul, Kostiantyn V.; Vashchenko, Serhii; Khudyakov, Olexander; Bembenek, Michał; Zinchenko, Andrii; Krot, Pavlo V.; Solodka, Nataliia
    ENG: The screw feeder design for the pre-compaction of bulk materials to be briquetted in a roll press is considered to increase the overall reliability. The relationship between the parameters of the screw feeder and its technological characteristics is investigated by the example of two fine-grained materials. A new mathematical model and design algorithm have been developed, which takes into account the properties of materials, the roller press parameters, the shape of the briquettes, and their deformation after compaction. The relationship between the pre-compaction pressure and the material stack height at the inlet is determined. The relations between the torque, the screw pitch, and the material stack height above the inlet, as well as the drive power and the screw pitch on productivity, are investigated. In experiments, using the proposed design, the compaction ratio of the peat increases by 22-27%, and hydrolyzed lignin – by 14-17%. The proposed approach allows for preventing drive overloading and ensures the reliable operation of pre-compaction devices for the roller presses.