Advanced design of the countercurrent jet mill for the mining industry

This article discusses a schematic diagram of a jet countercurrent mill used in the mining industry and operating in a closed grinding cycle for mineral processing, and ways to increase the economic efficiency of the grinding process. To develop a mathematical model of the aerodynamic process occurring in an accelerating tube, a digital twin of the grinding block of an improved design of a jet countercurrent mill, developed in the NX CAD/CAM/CAE system, was used. The improved design of the jet countercurrent mill is aimed at increasing the specific surface and reducing the specific energy consumption by creating an increased concentration of the material in a limited volume. When the energy carrier with particles of ore material moves, the main flow narrows and the material acquires additional acceleration, and the expansion of the two-phase flow in the form of a torch is also excluded. Based on the formulas formulated by Academician L. I. Sedov of the laws of conservation of energy, formulas were derived that make it possible to calculate the trajectory of a particle in the grinding chamber of a jet countercurrent mill and determine the characteristics of an aerodynamic process such as particle and energy carrier velocity, pressure and density. The obtained expressions make it possible to choose rational modes of operation of a jet mill used for grinding and beneficiation of minerals.

Anciferov S. I., Bulgakov S. B., Karachevceva A. V., Timashev M. V. Advanced design of the countercurrent jet mill for the mining industry. MIAB. Mining Inf. Anal. Bull. 2022;(12-2):5—16. [In Russ]. DOI: 10.25018/0236_1493_2022_122_0_5.

The work was carried out within the framework of the implementation of the federal university support program «Priority 2030» using equipment based on the Center for High Technologies of V. G. Shukhov BSTU.

Anciferov S. I., Cand. Sci. (Eng.), Associate Professor of the Mechanical Equipment Department, http://orcid.org/0000-0002-4210-3185, Belgorod State Technological University named after V. I. V. G. Shukhov (BSTU named after V. G. Shukhov),308012, Belgorod, Kostyukova street,46, Russia, e-mail: anciferov.sergey@gmail.com;
Bulgakov S. B., Cand. Sci. (Eng.), Associate Professor of the Department of Mechanical Equipment, Director of the Institute for the Organization and Management of Recruitment, http://orcid.org/0000-0002-8656-8443, Belgorod State Technological University. V. G. Shukhov (BSTU named after V. G. Shukhov) 308012, Belgorod, Kostyukova street,46, Russia, e-mail: bulgakov_s_b@mail.ru;
Karachevceva A. V., postgraduate student of the Mechanical Equipment Department, http:// orcid.org/0000-0002-8656-8443, Belgorod State Technological University named after
V. I. V. G. Shukhov (BSTU named after V. G. Shukhov) 308012, Belgorod, Kostyukova street,46, Russia, e-mail: karachevtseva.anastasiia@gmail.com;
Timashev Maksim Viktorovich, postgraduate student of the department “Mechanical equipment”, head of the educational unit, deputy head of the military training center at BSTU named after A. I. V. G. Shukhov, http://orcid.org/0000-0002-3486-0733, Belgorod State Technological University. V. G. Shukhov (BSTU named after V. G. Shukhov) 308012, Belgorod, Kostyukova street,46, Russia, e-mail: tmv1975@mail.ru.

Anciferov Sergej Igorevich, e-mail: anciferov.sergey@gmail.com No conflict of interest.

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