Shevchenko H., Shevchenko V., Sukhariev V., Tytov O., Samodryha O. Analysis of the material grinding process in a ball mill with multi-frequency vibro-impact excitation

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Parent Category: Geo-Technical Mechanics, 2025

Category: Geo-Technical Mechanics, 2025, Issue 173

Geotech. meh. 2025, 173, 61-70

 

Analysis of the Material Grinding Process in a Ball Mill with Multi-Frequency Vibro-Impact Excitation

Shevchenko H.

Shevchenko V.

Sukhariev V.

Tytov O.

Samodryha O.

M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

UDC 622.7

Language: English

Abstract. This article presents the results of a study on the parameters of the grinding process in a vibratory mill with multi-frequency vibro-impact excitation. The objective of the study is to determine the influence of technological parameters, such as the level of the grinding chamber filling with material, the physical and mechanical properties of the raw material, and the gaps between the striker and the mill’s driving frame on the efficiency of the grinding process. Two materials with different characteristics — basalt and ilmenite — were used in the experiments. The dependencies of the degree of grinding and mill productivity on the percentage of chamber filling with material were established, and the influence of the material’s physical and mechanical properties on the final grinding outcome was demonstrated. The results show that for both materials, an optimal chamber filling level of approximately 15–25% achieves the maximum degree of grinding, with a mill productivity of Q = 3–5 t·h/m³. Exceeding this level leads to reduced efficiency due to decreased intensity of grinding media movement. The influence of grinding time was determined, revealing that the most intensive grinding occurs within the first five minutes, with the degree of grinding ranging from 5 to 7. The initial particle size of the material (within the tested range of basalt particle sizes from 0.3 mm to 3 mm) has a minimal impact on the degree of grinding. The effect of gaps, which directly influence the chamber’s acceleration, was analyzed separately. It was shown that increasing the gaps (from 1 mm to 3 mm) enhances the degree of grinding due to increased impact energy. This fact was experimentally confirmed for both brittle basalt with a degree of grinding around 6 and more viscous ilmenite, with a degree of grinding around 4. The obtained dependencies can be used to optimize the operating modes of vibro-impact mills of a new type operating in a vibratory-impact regime, laying the foundation for further research in mathematical modeling and control of grinding processes in next-generation mills. The practical results of the study are important for advancing fine grinding technologies for minerals and improving the quality of the final product in the mining, metallurgical, and construction industries.

Keywords: vibratory mill, multi-frequency vibro-impact excitation, degree of grinding, material particle size, gaps between striker and driving frame.

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Shevchenko Heorgy, Doctor of Technical Sciences (D.Sc.), Head of Department of Mechanics of Mineral Processing Machines and Processes, M.S. Poliakov Institute for Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Shevchenko Volodymyr, Doctor of Technical Sciences (D.Sc.), Professor, Scientific Secretary of the Institute, Head of Department of Vibratory Transporting Systems and Complexes, M.S. Poliakov Institute of Geotechnical Mechanics of the NAS of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID0000-0002-7290-811X

Sukhariev Vitaliy, Ph.D. (Tech.), Senior Researcher of Department of Mechanics of Mineral Processing Machines and Processes, M.S. Poliakov Institute for Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Tytov Oleksandr, Ph.D. (Tech.), Senior Researcher of Department of Mechanics of Mineral Processing Machines and Processes, M.S. Poliakov Institute for Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. (Corresponding author).

Samodryha Oleh, Postgraduate Student, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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