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Increasing the efficiency of fine wet grinding of ore using the dynamic effect of ultrasound

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Category: Content №6 2025

Last Updated on 25 December 2025

Published on 30 November -0001

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Authors:

V. S. Morkun, orcid.org/0000-0003-1506-9759, University of Bayreuth, Bayreuth, Federal Republic of Germany, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

N. V. Morkun, orcid.org/0000-0002-1261-1170, University of Bayreuth, Bayreuth, Federal Republic of Germany, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

S. M. Hryshchenko*, orcid.org/0000-0003-4957-0904, State Tax University, Irpin, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Y. O. Hryshchenko, orcid.org/0009-0002-0582-4140, Volodymyr Dahl East Ukrainian National University, Kyiv, Ukraine

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (6): 052 - 060

https://doi.org/10.33271/nvngu/2025-6/052

Abstract:

Purpose. The aim was to develop a method that would enhance the efficiency of classifying crushed ore by particle size, thereby preparing it for metallurgical proces

Methodology. The following methods were used in the work: analysis of scientific and practical solutions; statistical methods for processing the results of experimental studies; methods of analytical synthesis; and methods of computer modeling for the synthesis and analysis of mathematical models.

Findings. The forces acting on crushed ore particles as they move in a layer of material on a vibrating screen have been investigated. The mechanism of contact interaction between solid-phase pulp particles has been substantiated, taking into account the geometry of contact surfaces, mechanical properties of materials, and loads applied to the contact. It has been proven that crushed ore particles and gas bubbles in the pulp flow, due to their individual characteristics (size, density, mass), each react in their own way to acoustic energy and the dynamic influence of ultrasonic vibrations applied and propagated in the medium. Based on the results of the analysis, it was concluded that ultrasound contributes to the diversity of dynamic reactions and increases the mobility of the components of the heterophasic structure of pulp materials. The conditions under which the influence of ultrasonic vibrations in ore pulp containing gas bubbles causes the destruction of ore aggregates and flocculates in it were analyzed. The parameters of ultrasonic vibrations that cause cavitation, the collapse of gas bubbles, and pressure surges of destructive amplitude in the pulp have been determined. It has been proven that acoustic emission arising from the propagation of ultrasonic vibrations in the pulp can be a general characteristic and property that determines the requirements for the form and parameters of controlling this process. A method for improving the efficiency of fine wet ore screening using the dynamic force of ultrasound on the classification product has been proposed.

Originality. A method has been developed to increase macrodiffusion and reduce the overall resistance to the movement of crushed ore pulp particles during screening by introducing ultrasonic vibrations of a certain amplitude and frequency into the oversize product of the screen, which allows increasing the speed of passage of crushed ore particles through the screen and reducing the proportion of unclassified product.

Practical value. The analysis of the results obtained shows an increase in the efficiency of fine wet screening of crushed ore by an average of 3 % due to ultrasonic treatment of the input product of the screen.

Keywords: rumbling, vibration, classification, control, pulp, ultrasound, modelling

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