Khabarovsk Institute of Mining, Khabarovsk Federal Research Center, Far East Branch, Russian Academy of Sciences, Khabarovsk, Russia

Khrunina N. P., Leading Researcher, Candidate of Engineering Sciences, npetx@mail.ru
Cheban A. Yu., Leading Researcher, Associate Professor, Candidate of Engineering Sciences

The article discusses prospects of research aimed at the use of nonconventional methods of energy deposition on mineral media and hydrodynamic influence on the processes of dispersion of solid particles in liquids. Spotlight is on rotary machines and plants using hydrodynamic ram phenomenon. It is established that the theory related to cavitation lacks sufficient development to be used in engineering and design of such machines. The conventional design is based on determining the geometric parameters of the flow of working members and hydrodynamic characteristics, including pressure and flow rate. The purpose of the study is to analytically determine the influence exerted by speed modes and volumetric flow rate of hydromixes on thermodynamic and structural changes in the system during destruction of mineral components at the first stage of microdisintegration in a new-type hydrodynamic generator. Based on process modeling, it is found that the governing part in dynamic eddy effects in the flow energy transformation belongs to the exposure time with regard to the thermodynamic potential of the system, subject to the volumetric flow rate, velocity and pressure of the hydromix jet. With an increase in the exposure time by two times and in the flow rate of the hydromix by five times, at the minimum content of the solid phase in the hydromix, the increment in the specific interphase surface of the mineral component reaches two orders of magnitude. The diagram of the proposed plant with a diffuser, two cone dividers with blades and inclined helix surfaces is considered. The advantage of such plants is a significant reduction in energy costs due to elimination of rotating parts. The development of theoretical, numerical and experimental methods for the study and engineering of gravity machines based on hydrodynamic phenomena and cavitation will make it possible to design adaptable pilot plants suitable for operation at mining facilities.

The studies were carried out using equipment of the Scientific Evidence Shared Storage and Processing Center of the Far East Branch of the Russian Academy of Sciences, supported by the Ministry of Science and Higher Education of the Russian Federation under Contract No. 075-15-2021-663.

1. Neronsky G. I., Borodavkin S. I. Method of estimating the contents of gold in placers with dominant small and thin its secretions. Zolotodobytcha. 2012. No. 158. pp. 21–24.
2. Kislyakov V. E., Nikitin A. V. Preparation of clay sands of placer deposits for disintegration by controlled water saturation. Gornyi Zhurnal. 2010. No. 2. pp. 28–30.
3. Alekseev V. S., Seryy R. S., Sobolev A. A. Improving fine gold recovery in sluice boxes. Obogashchenie Rud. 2019. No. 5. pp. 13–18.
4. Khrunina N. P., Mamaev Y. A., Stratechuk O. V., Khrunin T. O. Multilevel plant for recovery of valuable minerals. Patent RF, No. 2187373. Applied: 30.01.2001. Published: 20.08.2002. 2002. Bulletin, No. 23.
5. Khrunina N. P., Mamaev Y. A. Geotechnological complex with multistage disintegration. Patent RF, No. 2209974. Applied: 08.02.2003. Published: 10.08.2003. Bulletin, No. 22.
6. Cheban A. Yu., Shemyakin S. A. Parameters of scrapers for the introduction of layer-strip technologies of open pit mining. GIAB. 2007. Vol. 10, No. 12. pp. 285–294.
7. Cheban A.Yu., Shemyakin S.A. Resistance to unloading elongated buckets of scrapers. Construction and road machines. 2008. No. 6. рр. 45–48.
8. Ochosov O. Yu., Matveev A. I. Use of centrifugal concentration in by-recovery of gold in diamond-bearing sand processing at Almazy Anabara. GIAB. 2021. No. 1. pp. 120–129.
9. Danilov O. S., Belov A. V., Grebenyuk I. V. Ash and slag waste processing with extraction of rare metals as a key factor of social, economic and ecological well-being in coal mining countries. GIAB. 2018. No. 7. pp. 16–22.
10. Vanina E. A., Veselova E. M., Leonenko N. A. Mathematical model of the laser agglomeration process based on the distribution of the temperature field in the irradiated sample. Vestnik Amurskogo gosudarstvennogo universiteta. Series: Natural and Economic Sciences. 2012. No. 59. pp. 51–54.
11. Khrunina N. P. Improvement of a treatment processes of high-clayey goldbearing placers. Eurasian Mining. 2020. No. 2. pp. 28–32.
12. Michelis I. D, Olivieri A., Ubaldini S., Ferella F., Beolchini F. et al. Roasting and chlorine leaching of gold-bearing refractory concentrate: Experimental and process analysis. International Journal of Mining Science and Technology. 2013. No. 23. рр. 709–715.
13. Atici U., Comakli R. Evaluation of the physico-mechanical properties of plutonic rocks based on texture coefficient by. The Journal of the Southern African Institute of Mining and Metallurgy. 2019. Vol. 119. рр. 63–69.
14. Sakuhuni G., Altun N. E., Klein B., Tong L. A novel laboratory procedure for predicting continuous centrifugal gravity concentration applications: the gravity release analysis. International Journal of Mineral Processing. 2016. Vol. 154. рр. 66–74.
15. De Michelis I., Olivieri A., Ubaldini S., Ferella F., Beolchini F., Vegliò F. Roasting and chlorine leaching of gold-bearing refractory concentrate: experimental and process analysis. International Journal of Mining Science and Technology. 2013. Vol. 23. Iss. 5. рр. 709–715.
16. Xun Sun, Songying Chen, Jingting Liu, Shan Zhao, Joon Yong Yoon. Hydrodynamic cavitation: a promising technology for the industrial synthesis of nanomaterials. Frontiers in Chemistry. 2020. Vol. 8. DOI: 10.3389/fchem.2020.00259
17. Choi J., Cui M., Lee Y., Ma J., Kim J., et al. Hybrid reactor based on hydrodynamic cavitation, ozonation, and persulfate oxidation for oxalic acid decomposition during rare-earth extraction processes. Ultrasound. Sonochem. 2019. Vol. 52. pp. 326–335.
18. Gagol M., Przyjazny A., Boczkaj G. Wastewater treatment by means of advanced oxidation processes based on cavitation — A review. Chemical Engineering Journal. 2018. Vol. 338. pp. 599–627.
19. Gagol M. R., Soltani D. C., Przyjazny A., Boczkaj G. Effective degradation of sulfide ions and organic sulfides in cavitation-based advanced oxidation processes (AOPs). Ultrason. Sonochem. 2019. Vol. 58. ID. 104610.
20. Kim H., Koo B., Sun X., Yong Yoon J. Investigation of sludge disintegration using rotor–stator type hydrodynamic cavitation reactor. Separation and Purification Technology. 2020. Vol. 240. ID. 116636.
21. Fedotkin I. M., Nemchin A. F. The use of cavitation in technological processes. Kiev : Vischa shkola, 1984. 68 p.
22. Balabyshko A. M., Yudaev V. F. Rotor devices with flow modulation and their application in industry. Moscow : Nedra, 1992. 176 p.
23. Chervyakov V. M., Odnolko V. G. Use of hydrodynamic and cavitational phenomena in rotary apparatus. Moscow : Mashinostroenie, 2008. 116 p.
24. Stiles G. F. Cavitation in cоntrоl valves. Instruments and Cоntrol Systems. 1961. No. 11. рр. 2087–2097.
25. Sukharkov O. V. Optimization of parameters of direct-flow hydrodynamic emitter in conditions of hydrostatic pressure. Akusticheskii vestnik. 2008. Vol. 11, No. 4. pp. 54–63.
26. Dudzinskiy Y. M., Nazarenko A. F. Efficiency of axisymmetric hydrodynamic emitters in conditions of excessive static pressure. Akusticheskii zhurnal. 1996. Vol. 42, No. 4. pp. 569–572.
27. Syrotyuk M. G. Acoustic cavitation. Moscow : Nauka, 2008. 271 p.
28. Yakovleva A. A., Maltseva G. D Crystallochemical aspects in the evaluation of clay mineral particle interaction energy. Proceedings of the Siberian Department of the Section of the Earth Sciences of the Russian Academy of Natural Sciences. Geology, Exploration and Development of Mineral Deposits. 2018. Vol. 41, No. 1. pp. 99–114.
29. Isaenko I. I., Makhnov A. M., Smirnov E. M., Schmidt A. A. Simulation of high-speed cavitating flows in channels. St. Petersburg State Polytechnical University Journal. Physics and mathematics. 2018. Vol. 11, No. 1. pp. 55–65.
30. Khrunina N. P. Method for activating microdesintegration of a polymineral component of a hydraulic slurry. Patent RF, No. 2744059. Applied: 10.09.2020. Published: 02.03.2021. Bulletin, No. 7.