134 / 2023-08-06 00:01:48

Processing of ash and slag waste from thermal power plants to obtain building materials

ash and slag ovals, thermal power plant, ecology, secondary resources, building materials.

   Research purpose is to study physical and chemical properties of ash and slag waste from combustion of Ekibastuz coals and determine possibility of obtaining demanded building materials from them to reduce burden on the environment.

     Methodology. To study phase composition and structure of ash and slag waste, methods of X-ray phase and differential thermal and chemical analyzes were used at the latest installations of leading mills (Russia, Germany, Japan, Switzerland, etc.).

      Results. Chemical and granulometric composition of ash and slag was determined. Performed X-ray phase and differential thermal analysis. Analysis of the chemical composition of the Ekibastuz ash gives an idea of composition of mineral substances of coal. The main constituents are oxides of silicon and aluminum, there is also a large amount of iron oxide. Knowledge of the chemical composition of ash is necessary to decide whether it can be used to produce building materials. The results of heat treatment in a gradient furnace are presented. Conclusions are drawn about the possibility of using ash and slag waste in the construction industry and used for backfilling roads. Thus, all studies have shown possibility of using ash and slag waste as a secondary raw material in order to reduce anthropogenic load on the environment.

     Novelty lies in the technology development that allows to increase degree of complexity and environmental safety of technogenic waste development - this is progress of industrial and innovative power of state of respect for natural resources and environment.

      Practical significance lies in the fact that production of building materials quickly pays off, does not require expensive installations, tools and equipment.