Influence of particle geometry on the efficiency of operation of quasistatic and inertial disintegrators
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- Category: Content №6 2020
- Last Updated on 22 December 2020
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Authors:
V.P.Nadutyi, orcid.org/0000-0002-2453-0351, Dnipro University of Technology, Dnipro, Ukraine, email: This email address is being protected from spambots. You need JavaScript enabled to view it.
O.O.Tytov, orcid.org/0000-0001-6794-8240, Dnipro University of Technology, Dnipro, Ukraine, email: This email address is being protected from spambots. You need JavaScript enabled to view it.
D.L.Kolosov, orcid.org/0000-0003-0585-5908, Dnipro University of Technology, Dnipro, Ukraine, email: This email address is being protected from spambots. You need JavaScript enabled to view it.
V.V.Sukhariev, orcid.org/0000-0002-7102-4734, Institute of Geotechnical Mechanics named by N.Poljakov, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2020, (6): 021 - 027
https://doi.org/10.33271/nvngu/2020-6/021
Abstract:
Purpose. Research on interrelation of the efficiency of non-isometric particle destruction due to flexural deformation with the parameters of operational parts of new designs of roll and vibrational centrifugal disintegrators.
Methodology. A mathematical model of quasistatic flexural deformations of ellipsoid-shaped particles is developed for the case of their nip between the wave-profiled rolls of disintegrator, based on the classical problem of a beam bend with longitudinal compression. Amathematical model of inertial destruction of ellipsoid-shaped particles during free impact in a vibrational two-shaft centrifugal module is created based on combination of the beam bend problem, the contact deformations theory of Hertz and dAlembert principle. The dependences of the key efficiency parameters of the mentioned disintegrators on the geometrical parameters of particles of processed mining rocks are obtained by the methods of generalization and dimensionless parametrization.
Findings. The analytical model of flexural tension realization in ellipsoid-shaped particles for disintegrator having the wave profile of rolls has allowed establishing that the increase in the length coefficient of ellipsoid-shaped particles from 1.5 to 4 units leads to the enhancement of breaking stresses from 1.7 to 12 times, compared to the case of smooth rolls. The analysis of the model of inertial disintegration of ellipsoid-shaped particles has revealed that the destruction of particles narrow fractions in counter flows saves up to 20% of energy in comparison to the destruction by the rigid barrier. The particles of less than average size are destructed the most efficiently, during processing in counter flows and being in fractions of unequigranular structure. But the disintegration becomes more difficult as the relative size of particle rises.
Originality. Two mathematical models, which take into consideration the influence of flexural deformations of non-isometric particles modelled by ellipsoids on the level of breaking stresses for the disintegrators with wave profile of rolls, and also on the minimal speed of particles inertial flow for the vibrational two-shaft centrifugal module, are developed and analyzed.
Practical value. The obtained results allow determining the key parameters of operational parts for new designs of disintegrators. This forms the basis for development of techniques for calculation of operational parts of modern samples of crushing and grinding equipment.
Keywords: roll disintegrator, wave profile of roll, vibrational two-shaft centrifugal module, ellipsoid, flexural deformations
References.
1. Tytov, O.O. (2019). Analysis of Mining Rocks Disintegration Conditions in Crushers Having the Wave Profile of Rolls. In: Modernization and Engineering Development of Resource-Saving Technologies in Mineral Mining and Processing, Multi-authored monograph, (pp. 366-380). Petrosani, Romania: UNIVERSITAS Publishing.
2. Bondarenko, A.O., & Naumenko, R.P. (2019). Comprehensive solution of recycling waste from stone processing industry. Naukovyi Visnyk Natsionalnoho Hirnychoho Iniversytetu, (4), 96-101. https://doi.org/10.29202/nvngu/2019-4/14.
3. Sokur, M.I., Biletskii, V.S., Yehurnov, O.I., Vorobyov,O.M., Smyrnov, V.O., & Bozhyk, D.P. (2017). Preparation of minerals for enrichment: monograph. Kremenchuk: Kremenchutskyi Natsionalnyi Universytet im. M.Ostrohradskoho, Akademiia Hyrnychykh Nauk Ukrainy: PP ShcherbatykhO.V.
4. Nazarenko, I., Mishchuk, Ye., & Kuchynskyi, V. (2016). Evaluation and analysis of the main structural schemes of cone crushers. Hirnychi, budivelni, dorozhni ta melioratyvni mashyny, (88), 47-54.
5. Nadutyi, V.P., Loginova, A.A., & Sukharev, V.V. (2019). Results of studies on the dependence of productivity of a vibrating twin-shaft centrifugal module on operating and design parameters. Vibration in engineering and technology, 3(94), 5-10.
6. Babets, D., Sdvyzhkova, O., Shashenko, O., Kravchenko,K., & Cabana, E.C. (2019). Implementation of probabilistic approach to rock mass strength estimation while excavating through fault zones, Mining of Mineral Deposits, 13(4), 72-83. https://doi.org/10.33271/mining13.04.072.
7. Sdvyzhkova, O., Gapeiev, S., & Tykhonenko, V. (2015). Stochastic model of rock mass strength in terms of random distance between joints. New Developments in Mining Engineering 2015: Theoretical and Practical Solutions of Mineral Resources Mining, 1, 299-300.
8. Davydenko, O.M., & Ihnatov, A.O. (2019). Mechanics of effective destruction of rocks by cone-chain chisels. Porodorazrushaiushiy i metalloobrabatyvaiushchiy instrument, tekhnika ego izgotovleniia i primeneniia: Sb. nauch. tr., Kyiv, INM im. V.M.Bakulia NAN Ukrainy, (22), 148-157.
9. Hui, L., Freifei, Y., Yuguo, J., & Hongmin, Z. (2017). Support controlling on shear type floor heave deformation in coal roadway. Boletin Technico, 55(3), 348-355.
10. Sdvyzhkova, O., Golovko, Yu., Dubytska, M., & Klymenko, D. (2016). Studying a crack initiation in terms of elastic oscillations in stress strain rock mass. Mining of Mineral Deposits, 10, 72-77. https://doi.org/10.15407/mining10.02.072.
11. Hoshko, Z. (2016). Peculiarities of improvement of the electromagnetic vibrating crusher. Visnyk LNAU, Ahroinzhenerni doslidzhennia, 20, 140-149.
12. Nadutiy, V.P., & Tytov O.O. (2019). UA Patent No.132083. Dnipro: National Technical University Dnipro Polytechnic.
13. Bondarenko, A.A. (2018). Modelling of interaction of inclined surfaces of a hydraulic classifier with a flow of solid particles. Naukovyi Visnyk Natsionalnoho Hirnychoho Iniversytetu, (4), 13-20. https://doi.org/10.29202/nvngu/2018-4/5.
14. Sachuk, Yu.V., & Maksymuk, O.V. (2018). Computer modeling of elastic-plastic deformation in problems of contact interaction of canonical dies with a half-plane. Matematychne ta kompiuterne modeliuvannia. Seriia: Fisyko-matematychni nauky, (20), 126-134. http://dspace.nbuv.gov.ua/handle/123456789/162225.
15. Bobkov, S.P., & Polishchiuk, I.V. (2016). Comparison of different approaches to determining the impact duration of solids during grinding. Vestnik IGEI, (5), 66-70.
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