Coal ash and slag waste processing
As part of the activities of the ERG group of companies, large volumes of ash from the combustion of Ekibastuz coal are generated. At the moment, about 5.7 million tons are produced annually. According to "GOST (All-Union State Standard) classification 25818-2017 Fly ash from thermal power plants for concrete" the ash of the group is acid(composition SiO2-60,3%, Al2O3– 27,2%, Fe2O3– 5,53%). A search is underway for an economically viable technology for processing coal ash and ash and slag waste.
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