Yavruyan Kh.S.

Associate Professor of Civil Engineering Department, Candidate of Engineering Sciences, Associate Professor, Don State Technical University

Improving the operational characteristics of wall ceramic products through the use of coal waste heap processing materials

https://doi.org/10.58224/2618-7183-2025-8-6-3
Аннотация
Existing methods for disposing of coal industry waste do not ensure their effective use in the production of building materials, leading to the accumulation of waste dumps and worsening environmental conditions. This research addresses the performance limitations of traditional ceramics by proposing the integration of fine-grained coal mining waste as a primary raw material component. This strategy serves a dual purpose: resolving waste disposal concerns and enhancing ceramic properties through structural modification. The study evaluates the key physicochemical properties of such waste and their effect on material quality. It was determined that the inclusion of fine waste fractions necessitates optimized firing parameters to counteract reductions in density and strength. Empirical models defined the relationship between waste fineness, sintering temperature, and mechanical properties. A specialized semi-dry pressing method was engineered to minimize strength degradation and ensure the production of consistent ceramic blocks. The overarching goal of this technological approach is to achieve cost reduction and heightened product reliability via an optimized synthesis of raw materials and thermal regimes. Application of this method using Eastern Donbass coal waste is envisaged to ensure economic viability while upgrading the technical profile of the resulting construction materials.
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The production technology of high-performance ceramic stones based on the products of processing of coal dumps

https://doi.org/10.58224/2618-7183-2024-7-4-4
Аннотация
The aim of the research was to study the main properties of coal dumps processing products, their impact on the quality of finished products and the development of a technology for manufacturing process of ceramic stones with high efficiency. Structural features and chemical-mineralogical composition of coal dumps processing products have been studied, their pre-fired and firing ceramic properties have been studied. The raw mass compositions were chosen based on this, along with testing of laboratory samples. The impact of different technological factors on the properties of the final products has been identified and established. The material composition and technological properties of fine, fine and medium fraction materials are shown. A basic classification of the products derived from processing of waste heaps has been conducted based on grain composition, coal component content, and mineralogical and petrographic characteristics. The optimal formulations for raw material mixtures and the manufacturing process for producing large ceramic bricks with an average density below 800 kg/m3 are described. The impact of grinding degree of the waste heap processing products and the firing temperature on the strength of the samples have been established. The incorporation of finely dispersed products from waste heap processing decreases the density and strength of the samples. It is suggested to use semi-rigid extrusion technology for molding these products. Utilizing processed coal waste materials in wall ceramics production will aid in their disposal and enhance the environmental conditions in the area. This research was conducted in Russia at Don State Technical University in Rostov-on-Don. In creating a technology for producing ceramic blocks from screenings of waste heap processing in Eastern Donbass, minimal production costs and high profitability of production are envisaged.
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