Lapshyn Ye., Shevchenko O., Khayitov O. Foreign experience of processing ash slag waste from thermal power plants

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Parent Category: Geo-Technical Mechanics, 2024

Category: Geo-Technical Mechanics, 2024, Issue 168

Geoteh. meh. 2024, 168, 105-120

https://doi.org/10.15407/geotm2024.168.105

 

FOREIGN EXPERIENCE OF PROCESSING ASH SLAG WASTE FROM THERMAL POWER PLANTS

¹Lapshyn Ye., ¹Shevchenko O., ²Khayitov O.

¹M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

²Tashkent State Technical University named after Islam Karimov

UDC 622.33: 621.311.22.002.84

Language: English

Abstract. Ash slag waste is technogenic mineral formations that are produced in large quantities and represent a serious environmental hazard. On the other hand, it is a valuable mineral raw material for the production of various materials, housing, road, rural and industrial construction, and the mining industry. In accordance with the set goal, the foreign experience of processing ash waste from thermal power plants was studied. The impact of toxic substances contained in waste storage areas on the environment and the human body was studied. An analysis of the composition and characteristics of ash and slag waste was performed. An analysis of the composition and characteristics of ash and slag waste was performed. The experience of their processing in world practice is analyzed. Promising directions for use as an additional raw material in Ukraine are determined. Processing and utilization of ash and slag waste will allow the following: various materials and products for the construction industry can be obtained from cheap and affordable raw materials; when closing and laying mines, to reduce the risk of groundwater and surface water pollution due to the increase in concentrations of total dissolved solids, sulfates, manganese, iron, boron and various trace elements of heavy metals, which significantly exceed the basic concentrations; alkaline coal fly ash is a reliable and safe material for preventing acid drainage or restoring abandoned rock lands; to get additional raw materials for energy. The return of up to 20% of the carbon extracted from the ash, with a daily consumption of about a thousand tons at the thermal power station, will make it possible to reduce the amount of purchased coal and transport costs for its delivery from the station. Processing of ash and slag waste will allow to free and return to economic circulation the fertile land occupied for the storage facilities, to extract a significant profit from the sale of the obtained products and to significantly reduce the impact on the environment. Thanks to the use of ash and slag materials, significant savings will be achieved compared to traditional options for using natural raw materials.

Keywords: coal,ash waste from thermal power plants, CCW, recycling, recycling experience, fly ash, bottom ash, boiler slag, FGD gyps.

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About the authors:

Lapshyn Yevhen, Doctor of Technical Sciences (D.Sc.), Senior Researcher, Principal Researcher in Department 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 Geomechanics of Mineral Opencast Mining Technology, 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 0000-0003-2630-0186

Khayitov Odiljon, Doctor of Geological and Mineralogical Sciences (D.Sc.), Professor, Academician of the Academy of Sciences Turon, Head of the Mining Department of Tashkent State Technical University named after Islam Karimov, Tashkent, Uzbekistan, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0002-7735-5980

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