Semenenko Ye.V., Medvedieva O.O., Tatarko L.G., Khamynych О.V., Yeluzakh M. Influence of the properties of solid particles added to a structured suspension on its dynamic sedimentation stability
- Details
- Parent Category: Geo-Technical Mechanics, 2022
- Category: Geo-Technical Mechanics, 2022, Issue 163
Geoteh. meh. 2022, 163, 96-107
https://doi.org/10.15407/geotm2022.163.096
INFLUENCE OF THE PROPERTIES OF SOLID PARTICLES ADDED TO A STRUCTURED SUSPENSION ON ITS DYNAMIC SEDIMENTATION STABILITY
1SemenenkoYe.V., 1MedvedievaO.O., 2TatarkoL.G., 3Khamynych О.V., 4YeluzakhM.
1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 2Ukrainian State University of Chemical Technology, 3Oles Honchar Dnipro National University, 4Satbayev University
UDC 532.584:532.32:550.385.37
Language: English
Abstract. The research paper analyzes previous studies of the influence of two natural relatively pure aluminum oxides on rheological properties of structured suspensions. The results of the research show that the content of these materials in the mineral part of coal contributes to a decrease in viscosity inversely proportional to the ash content of coal to a certain fractional degree. The analysis showed that the effect of additions of mineral particles, their size and concentration on the dynamic or static sedimentation stability of structured suspensions has never been studied.
The aim of the research paper is to study the effect of additions of mineral particles of polydisperse granulometric composition of different nature on the dynamic sedimentation stability of a structured suspension of high-ash coals.
The solution of the problem is carried out by comparison of the forces of attraction and repulsion, which are characterized by an ion-electrostatic and van der Waals nature, with the forces , which arise when a fluid flows around two particles of different density and size, with taking into account the turbulent component and speed deficits proportional to the hydraulic sizes of interacting particles.
As a result of the research, the authors developed and specified the hypothesis of the mechanism of aggregative stability of a structured suspension in dynamics. It takes into account the heterogeneity of the properties of particles of the solid phase, which made it possible to establish the value of the average flow velocity in a circular tube, at which the aggregative stability of a structured suspension is disturbed. It is found that the particle size, the nature of the solid material and its mineral inclusions, their surface potential, and rheological characteristics are the main factors, which determine the aggregative stability of structured suspensions.
The influence of rheological characteristics of the structured suspension and the radius of the pipeline on the flow velocity, at which its aggregative stability was disturbed, was studied for the case when the solid phase was represented by particles with different density and fineness. In addition, the minimum possible ratio of the Archimedes parameters of the interacting particles, at which the effect of pseudo-homogeneity occurred, was evaluated.
Keywords: pseudo-homogeneity, rheological characteristics, structured suspension, effective viscosity, ash content.
REFERENCES
1. Krut, O.A. (2002), Vodovuhilne palyvo [Hydrocarbon fuel], Naukova dumka, Kyiv, Ukraine.
2. Dyakun (Slobodiannykova), I.L. (2014), Povyshenie effektivnosti energeticheskoy pererabotki uglya [Increasing the efficiency of energy processing of coal], Naukova dumka, Kyiv, Ukraine.
3. SvItliy, Yu.G. and Krut, O.A. (2010), GIdravlIchniy transport tverdih materIalIv [Hydraulic transport of solid materials], ShIdniy vidavnichiy dIm, Donetsk, Ukaine.
4. Kyrychko, S.M. and Demchenko, T.D. (2020), Vibіr perspektivnih bіotehnologіy ta obgruntuvannya tehnologіchnih rіshen, spryamovanih na pokraschennya ekologіchnogo stanu navkolishnogo seredovischa shovisch vіdhodіv vuglezbagachennya [Selection of promising biotechnologies and substantiation of technological solutions aimed at improving the environmental condition of coal enrichment waste storage facilities], Dnipro, Ukraine.
5. Svitliy, Yu.G. and Biletskiy, V.S. (2009), Gidravlichniy transport [Hydraulic transport], ShIdniy vidavnichiy dIm, Donetsk, Ukaine.
6. Kyrychko, S.M. (2016), Substantiation of parameters of processes of hydromechanization of mining works at use of hydromixtures of high concentration, Ph.D. Thesis, Geotechnical and mining mechanics, M.S. Poljakov Institute of Geotechnical Mechanics under NAS of Ukraine, Dnipro, Ukraine.
7. Shvornуkova, G.M. (2010), Reduction of energy costs for the transportation of hydrocarbon fuel by improving the processes and modes of operation of hydrotransport systems, Ph.D.Thesis, Mining, Volodymyr Dahl East Ukrainian National University, Lugansk, Ukraine.
8. Aleksandrov, V.I. (2000), Metody snizheniya energozatrat pri gidravlicheskom transportirovanii smesey vysokoy kontsentratsii [Methods of reducing energy consumption in hydraulic transportation of mixtures of high concentration], SPGGI (TU), St. Petersburg, Russia.
9. Smoldyrev, A.Ye. and Safronov, Yu.K (1989), Truboprovodniy transport kontsentrirovannykh gidrosmesey [Pipeline transportation of concentrated slurries], Mashinostroenie, Moscow, USSR.
10. Murko, V.I. (1999), Scientific basis for the processes of obtaining and effective use of water-coal suspensions, Dr. tech. Sciences Thesis, Moscow, Russia.
11. Biletskyi, V.S., Krut, O.A. and Vlasov, Yu.F. (2006), “Rheological characteristics of water-coal suspensions depending on the quality of the initial coal”, Vistnik Krivorizkogo tehnIchnogo universitetu, no. 11, рр. 49–55.
12. Kostovetsky, S.P., Murko, V.I. and Olofinsky, E.P. (1989), “Some results of research on the processes of preparation, transportation and direct combustion of water-coal suspension”, Sb. nauchn. tr. NPO Gidrotruboprovod: seriya Voprosyi opredeleniya tehnologicheskih parametrov lineynoy chasti gidrotransportnyih system, рр. 4–10.
13. Samoilik, V.G. (1992), Development of a technology for obtaining a solid phase of water-coal fuel with an appropriate level of ash content, Ph.D. Thesis, Dnepropetrovsk, Ukraine.
14. Samoilik, V.G., Elishevich, A.T. and Makarov, A.S. (1990), “Influence of the composition of mineral impurities on the rheological properties of water-coal suspensions”, Himiyatverdogotopliva, no. 5, рр. 76–81.
15. Maystrenko, A., Dunaevska, N, and Fridman, M. (1988) “Results of experiments on dust combustion of Ukrainian anthracites”, Vozmozhnosti modernizatsii ukrainskih ugolnyih elektrostantsiy, delovyie vozmozhnosti i potrebnost v investitsiyah: ukrainsko-amerikanskaya ob'edinyonnaya konferentsiya, рр. 121–125.
16. Baranov, Yu.D., Blyuss, B.A., Semenenko, E.V. and Shuryigin, V.D. (2006), Obosnovanie parametrov i rezhimov raboty i gidrotransportnyih sistem gornyih predpriyatiy [Substantiation of parameters and modes of operation of hydrotransport systems of mining enterprises], Novaya ideologiya, Dnepropetrovsk, Ukraine.
17. Program for the development and implementation of technologies for the industrial use of sludge, improving the environmental situation in coal-mining regions and averting possible emergency situations associated with tailings dam breaches(1997), Rozroblena vіdpovіdno do Postanovi Kabіnetu Mіnіstrіv Ukraуini vіd 28.03.97. № 280 «Pro hіd strukturnoуi perebudovi vugіlnoнi promislovostі», Minvugleprom Ukrayini, Kyiv, Ukraine.
18. (1998), “Environmental aspects of resource supply of energy security”, Delovoy vestnik, no. 9, рр. 4–10.
19. Yashchenko, Yu. (2004), “Study of the coal industry of Ukraine and ways to overcome the industry crisis”, Shid, no. 5(12), рр. 12–21.
20. Ohki, Akira (1995), “Adsorption Behavior of Polyanion Additives and Coal-Water Mixture Properties”, Coal Utilization & Fuel Systems: The Proceedings of the 20- th Intern. Techn. Conf. Clearwater – Florida USA, Mаrch, pp. 75–85.
21. Randell, J.K., Henry, C. D. and Butt, B. (1995), “Recovery of Fine Coal and Reclamation of Coal Slurry Impoundments”, Coal Utilization & Fuel Systems: The Proceedings of the 20- th Intern. Techn. Conf. Clearwater, Florida, USA, Mаrch, pp. 583–594.
22. Sastrawinata, T. (1996), “Current Status of Coal Water Slurry Techno-logy in Indonesia and its Prospects”, Coal Utilization & Fuel Systems: The Proceedings of the 21-st Intern. Techn. Conf. Clearwater. Florida, USA,Mаrch, pp. 821–828.
23. Semenenko, Ye.V., Demchenko, T.D. and Ryzhova, S.A. (2016), “Investigation of the dynamic sedimentation stability of structured suspensions under the action of turbulent pulsations”, Geo-Technical Mechanics, no. 130, pp. 115–124.
24. Krut, A.A. (2001), “High-ash coal sludge – an additional source of energy”, Zb. naukovihpracDNTU: serіjaelektrotehnіkataenergetika, no. 21, pр. 34–37.
25. Terenzi, A. (1996), “Rheological Properties and Setting Behaviour Influences in CWS Pipeline Flow” Coal Utilization & Fuel Systems: The Proceedings of the 21-st Intern. Techn. Conf. Clearwater, Florida, USA, Mаrch, pp. 645–656.
26. Papayani, F.A. and Switly, Y.G. (1995), “Utilization of Coal-Water Fuel in Heat Power Industry and by Public Utilities of Ukraine” Coal Utilization & Fuel Systems: The Proceedings of the 20- Intern. Techn. Conf. Clearwater, Florida, USA, Mаrch, pp. 193–202.
27. Gaved, A. (1995), Cashing in Coal’s Liquid Assets, WorldCoal, February, pр. 19–28.
About authors:
Semenenko Yevhen Volodymyrovych, Doctor of Technical Sciences (D.Sc), Senior Researcher, Head in Department of Mine Energy Complexes, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Medvedieva Olha Oleksiivna, Doctor of Technical Sciences (D.Sc), Senior Researcher, Senior Researcher in Department of Ecology of Development of Natural Resources, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Tatarko Larisa Gavrilivna, Candidate of Technical Sciences (Ph.D), Associate Professor in Department of Energy, Ukrainian State University of Chemical Technology (USUCT), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Khamynych Oleksandr Vasiliovych, Candidate of Technical Sciences (Ph.D), Associate Professor, Oles Honchar Dnipro National University, Dnipro, Ukraine.
Yeluzakh Mukhtar, Candidate of Technical Sciences (Ph.D), Associate Professor, Associate Professor in Department of Mining, Satbayev University (Non-commercial Joint-Stock Company “Kazakh National Research Technical University named after K.I. Satbaev”, Nur-Sultan, The Republic of Kazakhstan, m.yeluzakh@satbayev.university
