Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia
G. D. Pershin, Doctor of Engineering Sciences, Professor, Associate Professor E. G. Pshenichnaya, Senior Lecturer, Candidate of Engineering Sciences
I. A. Pytalev, Director of the Mining Engineering and Transport Institute, Doctor of Engineering Science, Professor
A. I. Kurochkin, Head of Department, Candidate of Engineering Sciences, Associate Professor, a.kurochkin@magtu.ru

The aim of the work is to develop a highly efficient method for rock disintegration, such that ensures resource saving by reducing energy consumption and increasing standard quality product yield at the maximum process efficiency, which makes it possible to create a new generation of high-performance and low-energy crushing machines based on jaw crushers with simple jaw movement. Concurrently, the recommendations for their use in ore pretreatment and in the construction industry are justified with regard to various advantages and disadvantages. The most efficient design of a mechanism adapted to crushing strong and abrasive rocks belongs to a crusher with a simple jaw movement. Efficiency of the developed method of rock disintegration is proposed to be evaluated by an indicator of theoretical productivity, with its limit value as maximum volume (mass) of initial rock particle in one revolution of crank (eccentric) of crusher’s movable jaw drive. In this case, the deformation force condition for the rupture of all particles of different cross dimensions in the crushing chamber during the accepted period is created by kinematic movement of a working tool, which includes movement of both cheeks towards their total approach according to the specified law. As a result, each horizontal row of particles is provided with the total linear deformation of their rupture into separate parts at a single force contact of the tool with the rock. The developed method is protected by the Russian Federation Patent No. 2792424, and makes it possible to implement a multi-cycle process of surface–volume fracture in a single cycle, which increases productivity by an order of magnitude and reduces the specific energy consumption of the crushing process by the same amount.

1. Klushantsev B. V., Kosarev A. I., Muyzemnek Yu. A. Crushers. Calculation, Design and Operation Features. Moscow : Mashinostroenie, 1990. 320 p.
2. Olevskiy V. A. Design, Calculation and Operation of Crushers. Moscow : Metallurgizdat, 1958. 459 p.
3. Tangaev I. A. Energy Intensity of the Processes of Extraction and Processing of Minerals. Мoscow : Nedra, 1986. 231 p.
4. Andreev S. Ye, Perov V. A., Zverevich V. V. Crushing, Grinding, and Screening of Mineral Resources. 3^rd revised and enlarged edition. Moscow : Nedra, 1980. 415 p.
5. Pershin G. D., Pshenichnaya E. G., Kuzbakov Zh. I. Mechanism of surface fracturing in contact action on particles of solid elastic–brittle body. Quarrying, Processing and Use of Natural Stone: International Conference Proceedings. Magnitogorsk : Izdatelstvo MGTU im. G. I. Nosova, 2018. pp. 195–207.
6. Gorlov I. V., Bolotov A. N., Mitusov P. E., Poletaeva E. V. Disintegration of soft rocks in crushing. Physics and Mechanics of Processes on the Surface and at Contact of Solids and Parts of Process and Power Equipment: Inter-University Collection of Scientific Papers. Tver, 2022. No. 15. pp. 99–106.
7. Litvinsky G. G. Hydraulically operated jaw impact crusher (problems and solutions). Transactions of the Donbas State Technical Institute. Alchevsk, 2023. No. 31(74). pp. 75–93.
8. Klushantsev B. V., Kosarev A. I., Logak L. N., Bogatskiy A. I. Jaw Crushers. Design Methods and Operation Specifics. Moscow, 1972. 85 p.
9. Goryachev B. E., Nikolaev A. A. Mining, Pretreatment and Processing of Nonferrous Metal Resources : Textbook. Moscow : NITU MISiS, 2021. 368 p.
10. Machado P. C., Pereira J. I., Sinatora A. Abrasion wear of aust enitic manganese steels via jaw crusher test. Wear. 2021. Vol. 476. ID 203726.
11. Sinha R. S., Mukhopadhyay A. K. Failure Rate Analysis of Jaw Crusher: A Case Study. Sādhanā. 2019. Vol. 44. DOI: 10.1007/s12046-018-1026-4
12. Murithi M., Keraita J. N., Obiko J. O., Mwema F. M., Wambua J. M. et al. Optimization of the swinging jaw design for a single toggle jaw crusher using finite element analysis. International Journal on Interactive Design and Manufacturing. 2022. Vol. 18. pp. 6351–6358.
13. Pershin G. D., Pshenichnaya E. G., Pytalev I. A., Kurochkin A. I. Ways to increase the efficiency of rock disintegration by jaw crushers. Izvestiya Tulskogo gosudarstvennogo universiteta. Nauki o Zemle. 2024. No. 1. pp. 313–326.
14. Altshul G., Gouskov A., Panovko G. Nonlinear dynamics of a jaw crusher taking into account the interaction with the rock. Proceedings of the 14^th International Conference on Vibration Problems. Series: Lecture Notes in Mechanical Engineering. Singapore : Springer, 2021. pp. 539–555.