Authors: A.V. Taskin, R.S. Fediuk, D.R. Fedotov

Title of the article: Complex processing of ash and slag waste from coal-fired power plants and coal enrichment waste

Year: 2025, Issue: 1, Pages: 28-36

Branch of knowledge: 2.6.7. Technology of inorganic substances

Index UDK: 691

DOI: 10.26730/1999-4125-2025-1-28-36

Abstract: Approximately 7 billion tons of industrial waste in the Russian Federation are generated by the coal mining industry; in addition, approximately 1.8 billion tons of ash and slag waste (ASW) are produced by coal power plants. This article on this topical issue (utilization of large-tonnage industrial waste with the production of new competitive and import-substituting products) presents the results of the development of a comprehensive technology for recycling coal mining and coal processing waste. Within the framework of the industrial technological process, a method for extracting unburned carbon material, slag sand, iron-containing concentrate and hollow aluminosilicate microspheres was successfully tested. At the initial stage of comprehensive ASW utilization, elements that hinder further deep processing of waste are removed: unburned coal, coarse slag aluminosilicate sand, iron oxides and their derivatives, aluminosilicate microspheres (if they are present in a specific ash and slag mixture). The further stage of complex processing allows to transform more than half of the waste volume into useful products. A separate stage of complex processing includes a group of technologies for the creation of building materials. The proposed functional scheme of complex processing of ash and slag waste allows to effectively use ash and slag waste, extracting useful components from them and producing various materials and products for various industries (construction, metallurgy, road and chemical). This facilitates the transition of energy enterprises to low-waste technologies and a reduction in the environmental impact on the environment.

Key words: coal ash thermal power plant slag binder geopolymer cement replacement

Receiving date: 25.12.2024

Approval date: 22.01.2025

Publication date: 12.03.2025

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