Determining the effect of rotation speed on the energy efficiency of the impact, compression, and abrasion grinding processes in a tumbling mill

Authors

DOI:

https://doi.org/10.15587/1729-4061.2025.343388

Keywords:

tumbling mill, intra-chamber filling, grinding by impact, crushing, and abrasion, energy efficiency

Abstract

This study investigates a grinding process in a tumbling mill loaded by impact, crushing, and abrasion. The impact, compression, and shear interactions of particles are taken into account, the intensity of which is determined by the zones of flight, shear layer, and solid flow of the fill in the cross-section of the rotating drum chamber.

The task addressed is to determine the influence of rotation speed on the energy intensity of the grinding process for individual loading mechanisms.

An experimental method for numerical modeling of productivity analogs for grinding mechanisms by the energies of the corresponding interactions was applied.

The energy intensity of the process was estimated by the ratios of productivity analogs and the relative power of rotation drive. Energy efficiency was determined taking into account experimental data on physical productivity and drive power of the mill model.

The effect of rotation speed on grinding was experimentally estimated at a chamber filling degree of 0.45.

The phenomenon of an intensive decrease in the energy intensity of the grinding process with a decrease in rotation speed was established.

The results made it possible to identify energy-efficient values of the relative rotation speed for the grinding processes: coarse – by impact at ψω = 0.75–0.9, medium – by crushing at ψω = 0.55–0.65, and fine – by abrasion at ψω = 0.3–0.4. The established effect is explained by the revealed activation of interactions: impact – at high-speed, compressive – at medium-speed, and shear – at low-speed rotation.

The established patterns enable prediction of rational technological parameters for energy-saving processes of multi-stage grinding in tumbling mills.

Author Biographies

Yuriy Naumenko, National University of Water and Environmental Engineering

Doctor of Technical Sciences, Associate Professor, Professor

Department of Construction, Road and Reclamation Machines

Kateryna Deineka, Separate Structural Unit “Rivne Technical Vocational College of the National University of Political Science and Technology”

PhD, Teacher of the Highest Category

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Determining the effect of rotation speed on the energy efficiency of the impact, compression, and abrasion grinding processes in a tumbling mill

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Published

2025-12-30

How to Cite

Naumenko, Y., & Deineka, K. (2025). Determining the effect of rotation speed on the energy efficiency of the impact, compression, and abrasion grinding processes in a tumbling mill. Eastern-European Journal of Enterprise Technologies, 6(1 (138), 41–53. https://doi.org/10.15587/1729-4061.2025.343388

Issue

Vol. 6 No. 1 (138) (2025): Engineering technological systems

Section

Engineering technological systems

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Copyright (c) 2025 Yuriy Naumenko, Kateryna Deineka

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