RECYCLING AND USE OF ASH AND SLAG WASTE

This article presents research in the field of storage and accumulation of ash and slag waste from coalfired power plants in the Republic of Kazakhstan. Aspects of recycling are considered, as well as options for the disposal of ash and slag waste. The granulometric and chemical composition is described, the acidity (Ph) and basicity coefficients of coal-fired power plant waste are determined, and the material class is established. The article describes a new technology for the production of ceramic products using ash and slag waste. The dependence of the addition of ash and slag waste to the composition of clay mixtures in the production of ceramic products has been determined. The optimal firing parameters of the muffle furnace have been determined depending on the temperature change. The physical and mechanical properties of the obtained materials, as well as such indicators as: thermal conductivity, compressive strength, have been studied. According to the research results, new methods of processing ash and slag waste have been obtained. To reduce the anthropogenic impact on the environment, a comprehensive study of ash and slag waste in need of recycling was conducted. The research revealed signs in the main seam: acid and basic coefficients, silicate coefficients and quality coefficients, the main task of which is to further study the physico-chemical patterns of waste in various types of heat treatment and the further use of ash and slag waste in industry. At the same time, it is taken into account that acidic ash is characterized by an unstable chemical composition and has no astringent properties, however, when accelerators are added, it becomes viscous, which improves quality indicators.

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