Satbayev University, Almaty, Kazakhstan

Kuldeev E. I., Professor, Candidate of Engineering Sciences, kuldeev_erzhan@mail.ru
Nurlybaev R. E., Professor, PhD
Ashimova A. A., Candidate for a Doctor’s Degree

Research Institute of Comprehensive Exploitation of Mineral Resources — IPKON, Moscow, Russia

Fedotenko N. A., Senior Researcher, Candidate of Engineering Sciences

The article presents the results of assessing impact of ash dumps on the natural environment under conditions of burning coal from the Ekibastuz deposit in Kazakhstan. It is shown that in the area of ash storage facility at Ekibastuz SDPP-2 and in the Almaty region, as a result of activities of three thermal power plants, huge amounts of ash dumps have been accumulated and significantly pollute the environment. Possibilities of obtaining popular building materials from them have been determined. The relevance and significance of this problem is enhanced by fact that manmade waste from thermal power plants is insufficiently processed while current ash waste accumulates and occupies huge areas, which withdraws them from land use. Utilization of ash dumps makes it possible to reduce the anthropogenic load on the environment and ensures the rational use of secondary raw materials. Possibility of obtaining agloporite from the ash of Ekibastuz coal used by the thermal power plant of Almaty is studied. The chemical and granulometric composition of ash and slag is determined. X-ray diffraction and differential thermal analyses are performed. The analysis of chemical composition of Ekibastuz ash describes the composition of the mineral substances of coal. The main components are silicon and aluminum oxides, and a large amount of iron oxide is also present. Knowledge of the chemical composition of ash is necessary to decide on the possibility of using it to obtain building materials. Thus, all studies conducted have shown the possibility of using ash and slag waste as secondary raw materials in order to reduce the anthropogenic load on the environment.
This research was carried out within the framework of grant funding from the Ministry of Science and Higher Education of the Republic of Kazakhstan BR21882292 “Integrated development of sustainable construction industry: innovative technologies, production optimization, efficient use of resources and creation of technological park”.

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