Lapshyn Ye., Shevchenko O. Determining the possibilities of using fly ash of DTEK Рrydniprovska ТРР as additional raw material

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Parent Category: Geo-Technical Mechanics, 2024
Category: Geo-Technical Mechanics, 2024, Issue 171

Geoteh. meh. 2024, 171, 31-46

https://doi.org/10.15407/geotm2024.171.031

 

DETERMINING THE POSSIBILITIES OF USING FLY ASH OF DTEK PRYDNIPROVSKA TPP AS ADDITIONAL RAW MATERIAL

 Lapshyn Ye.

Shevchenko O.

M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

UDC 622.33: 621.311.22.002.84

Language: English

Abstract. Accumulated ash and slag waste (ASW) from fuel and energy complex facilities in Ukraine are considered potentially dangerous sources of environmental pollution in adjacent areas. More than 80% of the mineral composition of coal during combustion passes into fly ash (FA), up to 20% into slag. Ashes of coal-fired thermal power plants of Ukraine contain carbon in an amount of 5% to 30%. The increased content of unburned ash in ash and the complex granulometric composition do not allow for the widespread use of ash in the construction industry in large volumes (for concrete - it is prohibited by standards). At the same time, ash is a valuable raw material for recycling. For widespread use in the construction sector, it is necessary to bring the quality of ash to indicators that meet the standards. The conducted studies of fresh (dry) fly ash showed the prospects of its processing, the products of which are of industrial interest. The unburned carbon remaining in the ash is distributed unevenly by the size classes of the original product, the samples contain from 18.53% to 30.48% of unburned coal. The ash content is most in the +0-0.05 mm class, from 44.97% to 81.47%. If the ash is divided by the boundary size of 0.05 mm, it is possible to obtain an oversize product with a coal content of Cc from 6.05% to 14.6% with an ash content of Ca from 2.41% to 24.87%. Dry ash does not require dehydration and drying, additional transportation to the processing site. When processing dry ash, an important factor is stopping the build-up of the fly ash accumulators. The products of the complex technology of processing dry fly ash are the silicate part and carbon. The carbon part is presented in the form of dust-like particles of coke, which after extraction from the ash can be returned for further combustion. The silicate part of the ash requires additional research, since its mineralogical composition, its value and the feasibility of inclusion in the technology of complex processing for the purpose of subsequent disposal have not been determined. With appropriate methods of use and available technologies, ASW becomes a high-quality, cheap, accessible, wear-resistant, frost-resistant substitute for natural materials, having binding properties that are used in world practice in the production of concrete, bricks, asphalt concrete mixtures, ceramic tiles, thermal insulation, etc.

Keywords: coal, ash and slag waste from thermal power plants, coal combustion products, fly ash, processing experience, fly ash processing, classification.

 

REFERENCES

1. Myakaeva, H.M. (2018), Modeling of man-made impact of thermal power facilities on the hydrosphere, Abstract of Ph.D. dissertation, Ecological safety, Sumy State University, Sumy, Ukraine, available at: http://essuir.sumdu.edu.ua/handle/123456789/68329 (Accessed 11 September 2024).

2. Kryzhanivskyi, E.I. and Koshlak, G.V. (2016), “Environmental problems of energy”, Oil and Gas Power Engineering, no. 1(25), pp. 80–90, available at: http://nbuv.gov.ua/UJRN/Nge_2016_1_12 (Accessed 11 September 2024).

3. Stepanov, A.V. and Kukhar, V.P. (2004), “Dostizheniya energetiki i zashchita okruzhayushchey sredy” [Advances in energy engineering and environmental protection, Naukova dumka, Kyiv, Ukraine, available at: https://www.nas.gov.ua/EN/Book/Pages/default.aspx?BookID=0000011078 (Accessed 11 September 2024).

4. Demchenko, V. (2016), “Export-import potential of ash microspheres in Ukraine”, Products and markets, no. 2, pp. 31–38, available at: http://tr.knute.edu.ua/files/2016/22/6.pdf,b (Accessed 11 September 2024).

5. Official website of the State Statistics Service of Ukraine (2024), available at: http://www.ukrstat.gov.ua (Accessed 18 March 2024).

6. Serdyuk, V.R., Rudchenko, D.G. and Gudz, D.V. (2021), “The use of fly ash from the Burshtyn TPP in the production technology of autoclaved aerated concrete”, Visnyk Vinnytsʹkoho politekhnichnoho instytutu, no. 2, pp. 24–31, https://doi.org/10.31649/1997-9266-2021-155-2-24-31

7. Nadutyy, V.P., Sukharev, V.V. and Kostyrya, S.V. (2018), “Analysis of mineral composition and efficiency of complex dewatering of fly ash during coal combustion at thermal power plants”, Vibratsiyi v tekhnitsi ta tekhnolohiyakh, no. 3 (90) , pp. 68–74, available at: http://repository.vsau.org/getfile.php/19225.pdf (Accessed 11 September 2024).

8. Nadutyy, V.P., Kostyrya, S.V. and Sevastyanov, V.S. (2016), “Justification of the feasibility of complex processing of fly ash from thermal power plants”, Geo-Technical Mechanics, no. 131, pp. 59–66, available at: http://dspace.nbuv.gov.ua/bitstream/handle/123456789/138772/06-Nadutyi.pdf?sequence=1 (Accessed 11 September 2024).

9. Egorov, P.A. and Bereznyak, A.A. (2007), “Technology of processing ashes from thermal power plants”, Zbahachennya korysnykh kopalyn, no. 29(70)–30(31), pp. 224–227.

10. Dryuchenko, M.M. (1992), “Development and use of highly efficient coal enrichment equipment and technology”, Ugol' Ukrainy, no. 8, pp. 38–40.

11. Zolotko, A.A. (1996), “Resources of secondary fuel in enrichment waste and the possibilities of its extraction”, Ugol' Ukrainy,no. 12, pp. 36–39.

12. Stepanov, A.V. and Kukhar, V.P. (2004), “Dostizheniya energetiki i zashchita okruzhayushchey sredy” [Advances in energy engineering and environmental protection”, Naukova dumka, Kyiv, Ukraine, available at: https://www.nas.gov.ua/EN/Book/Pages/default.aspx?BookID=0000011078 (Accessed 11 September 2024).

13. Bereznyak, A.A., Dreshpak, A.S. and Glukhovery, N.R. (2019), “Study of enrichment of thermal power plant fly ash on a pneumatic flotation machine of the Jameson Cell type”, Zbahachennya korysnykh kopalyn, no.74(115), pp. 62–69.

14. Sklyar, L.V. (2016), “Technology of enrichment of ash and slag of Zelenodolsk TPP with obtaining of aluminosilicate microspheres”, Zbahachennya korysnykh kopalyn, no. 63(104), pp. 22–24.

15. Heidrich, C. and Feuerborn, J. (2022), “Global opportunities and challenges for coal combustion products with a Circular Economy”, World of Coal Ash Proceedings, available at: https://worldofcoalash.org/wp-content/uploads/2022/07/0478_0692_000418.pdf (Accessed 11 September 2024).

16. Harris, D., Heidrich, C. and Feuerborn, J. (2019), “Global aspects on Coal Combustion Products”, Asian coal ash association, available at: https://www.asiancoalash.org/_files/ugd/ed8864_53ad887cdb1c4bbda4979c8069941a95.pdf (Accessed 11 September 2024).

17. Heidrich, C., Feuerborn, H.J. and Weir, A. (2013), “Coal combustion products: a global perspective”.  https://doi.org/10.1038/s41407-024-2076-6

18. Bielecka, A. and Kulczycka, J. (2020), “Coal Combustion Products Management toward a Circular Economy – A Case Study of the Coal Power Plant Sector in Poland”, Energies, vol. 13, 3603, https://doi.org/10.3390/en13143603

19. Vildanova, D. (2023), “Utilization of coal ash with minimal consequences for the environment and human health”, Analytical note by Deka Group, available at: https://movegreen.kg/wp-content/uploads/2023/04/D6FF5ED2-E362-4B78-8F97-0A7317DFB6FF.pdf (Accessed 11 September 2024).

20. Dauresh, G.S. (2022), Development of a comprehensive technology for processing ash with the extraction of valuable metals, Abstract of Ph.D. dissertation, Metallurgical Engineering, K.I. Satpayev Kazakh National Research Technical University, Almaty, Republic of Kazakhstan, available at: https://f.twirpx.link/file/3858323/ (Accessed 11 September 2024).

21. Lapshin, Ye., Shevchenko, O. and Khayitov, O. (2024), “Foreign experience of processing ash slag waste from thermal power plants”, Geo-Technical Mechanics, issue 168, pp. 105–120. https://doi.org/10.15407/geotm2024.168.105

22. Lapshyn, Ye. and Shevchenko, O. (2024), “Processing of ash waste from thermal power plants: foreign experience and Ukrainian realities”, Geo-Technical Mechanics, issue 169, pp. 45–65. https://doi.org/10.15407/geotm2024.169.045

23. Lapshin, Ye. and Shevchenko, O. (2024), “Determining the possibilities of using fly ash on the example of THE DTEK Prydniprovska TPP”, Geo-Technical Mechanics, vol. 170, pp. 17–27. https://doi.org/10.15407/geotm2024.170.017

24. Lapshin, E.S.and Shevchenko, A.I. (2013), "Ways of improvement of vibrational segregation and dehydration of mineral raw materials", Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no 3, pp. 45–51, available at:  http://nvngu.in.ua/index.php/en/archive/on-the-issues/784-2013/contents-no-3-2013/solid-state-physics-mineral-processing/2190-ways-of-improvement-of-vibrational-segregation-and-dehydration-of-mineral-raw-materials (Accessed 11 September 2024).

25. Lapshyn, Y. and Shevchenko, O. (2024), "Prospects for using screens with double vibration-impact excitation for size separation and dewatering of wet mineral raw materials that are difficult to classify", V International Conference "ESSAYS OF MINING SCIENCE AND PRACTICE, IOP Conf. Ser.: Earth Environ. Sci., vol. 1348, 012074, doi:10.1088/1755-1315/1348/1/012074.

 

About the authors:

Lapshyn Yevhen, Doctor of Technical Sciences (D.Sc.), Senior Researcher, Principal Researcher in Department of Ecology of Natural Resources Development, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0000-0002-5443-5566

Shevchenko Oleksandr, Doctor of Technical Sciences (D.Sc.), Senior Researcher, Senior Researcher in Department of Geomechanical Basis of Open-Pit Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Science of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. (Corresponding author), ORCID 0000-0003-2630-0186