Surface adhesion barrier management in dust suppression at mining enterprises

The effect of dust suppression at mining enterprises depends significantly on overcoming the energy barrier during the collision of liquid droplets with dust particles, and the transfer of the system «solid-liquid» into a more stable state, i.e. it is determined by the degree of coagulation and the ability of liquid droplets to capture dust particles. Under the conditions of inertial orthokinetic hydrovortex heterocoagulation and the change in the angular velocity of a liquid droplet rotation  , one can control the critical value of Stokes number reducing the inhibitory surface adhesion barrier. The attached vortex caused by the rotation of a liquid droplet reduces the static pressure in the zone of its contact with a dust particle, thus, increasing the wetting angle up to , which contributes to the reduction in aerodynamic energy barrier. The experiments verified the criterial equation of hydrovortex coagulation to be applied in order to ensure the identity of the results of simulation tests and real physical processes of dust suppression. The results of calculations and experiments using the proposed mathematical model showed high efficiency of hydrovortex heterocoagulation enabling to reduce water consumption by 25%, reduce the minimum size of absorbed particles of coal dust to 5·10–7 m, to increase the efficiency of dust suppression up to 99% in comparison with traditional high-pressure hydrodedusting. The use of theoretical and experimental studies enables to improve the methods for designing hydrovortex injectors, which are the main element of dust precipitators utilized in the fuel and energy complex and in manufacturing construction materials.

Makarov V. N., Ugolnikov A. V., Makarov N. V., Filatov A. M. Surface adhesion barrier management in dust suppression at mining enterprises. MIAB. Mining Inf. Anal. Bull. 2022;(11-2):114-125. [In Russ]. DOI: 10.25018/0236_1493_2022_112_0_114.

V.N. Makarov¹, Dr. Sci. (Eng.), Professor, e-mail: uk.intelnedra@gmail.com, ORCID ID: 0000-0002-3785-5569,
A.V. Ugolnikov¹, Cand. Sci. (Eng.), Assistant Professor, Head of Chair, e-mail: ugolnikov@yandex.ru, ORCID ID: 0000-0002-8442-4841,
N.V. Makarov¹, Cand. Sci. (Eng.), Assistant Professor, Head of Chair, e-mail: mnikolay84@mail.ru, ORCID ID: 0000-0001-7039-6272,
A.M. Filatov, Head of Mining Department, JSC Seversky Granite Quarry, 620920, Severka, Ekaterinburg, Russia,
¹ Ural State Mining University, 620144, Ekaterinburg, Russia.

A.V. Ugolnikov, e-mail: ugolnikov@yandex.ru.

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