Medium-Fraction Materials for Processing of Coal-Thread Waste Drains for the Production of Wall Ceramics

Yavruyan, Khungianos; Kotlyar, Vladimir; Gaishun, Evgeniy

doi:10.4028/www.scientific.net/msf.931.532

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…Screenings are formed during the processing of waste piles in order to extract coal. As a result of processing, various associated materials are formed, which are classified by the grain composition, amount of coal component and mineralogical-petrographic composition [7][8][9].…”

Section: Methodsmentioning

confidence: 99%

Raw Materials in East Donbass Based on Waste Piles Processing Screenings for the Large-Sized Ceramic Stones’ Production

Gaishun

Yavruyan

Kotlyar

et al. 2020

MSF

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The article shows the prospects of using large-sized ceramic stones for modern housing construction. A review of the raw materials and technologies for their production is given. It is emphasized that the most promising technology for the large-sized ceramic stones’ production is a hard extrusion technology with the possibility of laying raw products on firing buggies and accelerated drying and firing modes. The characteristic of waste piles processing screenings in East Donbass, which are considered to be the by-products of coal mining, as the main raw material for the large-sized ceramic stones’ production is given. Their ceramic properties and results of the raw materials’ selection are given, including: screenings - 60-65%; siliceous clay - 20-30% coal sludge - 10-15%, on the basis of which it is possible to obtain the products with low cost and high strength for the load-bearing wall structures. The features of the ceramic material microstructure based on the obtained raw material mixtures with optimal porosity are noted. It is shown that the waste piles’ involvement in the process of ceramic stones production will make it possible to obtain products with a density of less than 800 kg/m3, less thermal conductivity 0,20 m·°С)/W and the brand strength M150 and above, with a minimum cost. This will create a serious competition for gas silicate products and achieve a level of ceramic stones’ use in the total volume of wall products for the housing construction of 80%, like in Western Europe.

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Section: Methodsmentioning

confidence: 99%

Raw Materials in East Donbass Based on Waste Piles Processing Screenings for the Large-Sized Ceramic Stones’ Production

Gaishun

Yavruyan

Kotlyar

et al. 2020

MSF

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“…The quality of the finished ceramic products obtained from coal mining waste is greatly influenced by the physical and mechanical properties and chemical and mineralogical composition of the overburden [19]. Analyzing the data of chemical analysis of overburdened rocks of different lithological types, we can judge about the quantitative content of rock-forming oxides.…”

Section: Raw Materialsmentioning

confidence: 99%

Study of the Properties of Overburdened Rocks From Coal Mining: Overburden – As a Raw Material in the Production of Ceramic Bricks

Vyshar¹

2023

GEOMATE

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With the development of industry, the amount of man-made waste is growing rapidly. It is necessary to develop energy-efficient resource-saving technologies for use in the processing of. Research in past years has proved the possibility of using coal industry wastes as burning and baking additives in the production of ceramic products. The purpose of this work is to review the properties and discuss the options for using overburden as the main raw material in the production of ceramic bricks. Overburden requires a small amount of organic and chemical additives to adjust its technological properties. This research is due to the need to solve environmental, economic and technological problems in the utilization of overburdened rocks from coal mining. The physical and mechanical properties as well as chemical and mineralogical compositions of overburden have been investigated. Due to the heterogeneity and non-wettability of raw materials in water, it is necessary to grind them. The structural-mechanical characteristics and molding properties using highly mineralized carbonaceous rocks as a solid additive and aluminum oxychloride as a liquid additive have been studied. The obtained products with the use of additives have higher indicators: compressive strength 33.6-48.2 MPa, frost resistance 50-100 cycles, and water absorption 7.0-10.8. Thus, the results of the research prove the possibility of producing high-quality ceramic bricks from overburden, which will help to significantly reduce the cost of production, compensate for the lack of high-grade clay raw materials, and improve the environmental situation. Nevertheless, further research and technological developments are needed.

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“…In the process of heat treatment (firing), the formation of the crystallization structure of ceramic products takes place [15,16]. Experimental studies into different types of structures formed in the production of composite products were conducted to a greater extent for clay [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Strong Structure Formation of Ceramic Composites Based on Coal Mining Overburden Rocks

et al. 2023

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Currently, the amount of man-made waste worldwide is steadily increasing. It is, therefore, necessary to constantly look for effective ways of utilization and recycling. It is also necessary to reduce the use of non-renewable resources and reduce the impact on the environment. The use of coal industry waste is currently quite insignificant, amounting to some 10% of the total volume. The work aimed to study the properties of raw materials and study the processes of structure formation during the forming, drying, and firing of composite ceramic produced using overburden rock and additives. The work’s relevance lies in the need to solve environmental, economic, and technological problems related to the utilization of coal mining waste. Experiments of the past prove the possibility of using the waste coal industry as additives in the production of building materials. The article presents the results of studies of the chemical, mineralogical, and granulometric composition of overburden rock in coal mining. Peculiarities of structure formation during the forming, drying, and firing of ceramic composites based on optimal fractional compositions from coal-mine overburden were revealed. Organic and chemical additives were used for the correction of technological properties and improvement of the quality of finished composite products. The physical and mechanical indices of the obtained composite ceramic samples were determined, the analysis of which revealed that the use of highly mineralized carbonaceous rocks as solid additives provided a 2–2.5-fold increase in the strength of the product, 5.6% reduction in water absorption, and an increase in the product frost resistance by 20–25 cycles. The aluminum oxychloride influence on the physical and mechanical indices of the obtained composite articles was reflected in a reduction in their water absorption from 8.2 to 7.0%, a 10–12% increase in strength in compression, and an increase in freeze–thaw resistance by 30–35 cycles. Research results proved that the composition and properties of coal-mine overburden rock are close to those of conventional clays. With special technological preparation, they can be used for the production of composite ceramic products. This will significantly reduce the cost of bricks, to make up for the shortage of high-grade clay raw materials and improve the environmental situation. Nevertheless, further research into the use of coal-mine overburdens in the composite ceramic material technology is warranted.

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Medium-Fraction Materials for Processing of Coal-Thread Waste Drains for the Production of Wall Ceramics

Cited by 8 publications

References 4 publications

Raw Materials in East Donbass Based on Waste Piles Processing Screenings for the Large-Sized Ceramic Stones’ Production

Raw Materials in East Donbass Based on Waste Piles Processing Screenings for the Large-Sized Ceramic Stones’ Production

Study of the Properties of Overburdened Rocks From Coal Mining: Overburden – As a Raw Material in the Production of Ceramic Bricks

Strong Structure Formation of Ceramic Composites Based on Coal Mining Overburden Rocks

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