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Journal articles on the topic 'Ash and slag and dust deposits'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Grsic, Zoran, Predrag Milutinovic, Borivoj Rajkovic, Dragan Dramlic, Zoran Velikic, and Stefan Dramlic. "Ash dust concentration in the vicinity of ash disposal site, depending on the size of pond (“Water mirror”)." Chemical Industry and Chemical Engineering Quarterly 16, no. 3 (2010): 243–49. http://dx.doi.org/10.2298/ciceq091026027g.

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Thermal power plants Nikola Tesla ?A? and ?B? are large sources of ash from their ashes/slag deposit sites. Total sizes of ashes/slag depots are 600ha and 382ha, with active cassettes having dimensions ~200ha and ~130ha. Active cassettes of the disposal sites are covered by rather large waste ponds, which sizes varies depending on working condition of sluice system and on meteorological conditions. Modeling of ash lifting was attempted using results from dust lifting research. Relation between sizes of ponds and air dust concentration in the vicinity of ash disposal sites was analyzed. As expe

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Shubov, L. Ya, I. G. Doronkina, O. N. Borisova, L. M. Tyger, and T. R. Lyubetskaya. "Analytical evaluation and systematization of technologies for extraction of rare metals from production waste." E3S Web of Conferences 311 (2021): 09005. http://dx.doi.org/10.1051/e3sconf/202131109005.

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The article is a message containing systematized information on resource-saving technologies as the basic for involving metal-containing secondary raw materials in the economic turnover. The set of independent technologies arranged in a certain sequence that solve the problems of resource saving allows us to compare the specific features and effectiveness of the use of each of them, the details and features of the processes. It is shown that the following can be the main sources of rare metals and REE: phosphogypsum (REE, Sr); ash and slag waste from TPPs, ash and slag waste (REE, Ti, Sc); met

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3

Kasimov, Sh.A., and B.B. Khalkhadzhaev. "MATHEMATICAL MODELING OF THE PROCESS OF GAS-PULSED CLEANING OF THE SURFACES OF POWER AND UTILIZATION BOILERS OF THERMAL POWER INDUSTRY." INNOVATION IN THE OIL AND GAS INDUSTRY 3, no. 3 (2022): 3. https://doi.org/10.5281/zenodo.7466180.

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The article considers mathematical modeling of an effective method for cleaning heating surfaces of power and waste boilers, presents the characteristics of slag-ash and dust entrainments in flue gases, the mechanism of formation and properties of deposits, a description of the scheme and physical process of pulsed cleaning of contaminated surfaces. The results of analytical studies  of parameters characterizing the operation of the pulse cleaning system and their application in the operating waste heat boiler of the metallurgical complex are presented.

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Lunev, Aleksandr A. "Mechanical strength of slag crushed stone generated at coal-fired thermal power plants." Vestnik MGSU, no. 7 (July 2020): 968–79. http://dx.doi.org/10.22227/1997-0935.2020.7.968-979.

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Introduction. Production waste is used in the construction industry worldwide as it helps to cover a considerable portion of the industry’s demand for building materials. Coarse-grained slag deposits (slag crushed stone and sand), formed in the slag washout zone, have more potential for application than other ash and slag mixtures (coarse ASM), but they need more research. Mechanical properties of the slag crushed stone (coarse-grained ASM), formed in the course of coal combustion at Kansk-Achinsk, Kuznetsk coal deposits (in boilers equipped with liquid and dry slag removal facilities) and the

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Firas, Basim Ismail, Kee Wei Yeo, and Fazreen Ahmad Fuzi Noor. "Intelligent Prediction of Clinker Formation Condition for Steam Boiler Tubes Using Artificial Neural Network." MATEC Web of Conferences 255 (2019): 06007. http://dx.doi.org/10.1051/matecconf/201925506007.

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Ash, as one of the by-product of combustion either accumulates onto boiler tubes as slag or is collected by electrostatic precipitators attached to the backend of the boiler. Flue gas will transport these ash particles either to the inner surfaces of the boiler or to the dust collecting facilities at the backend of the boiler. Sintered ash deposits formed in the radiant section of the boiler are known as clinkers and they contribute to a wide variety of problems to the boiler. Preventative measures to combat clinker formation is in dire need to the energy sector. In this study, a prediction mo

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Prochazka, Lukas, and Adela Brazdova. "Surface modification of alkali-activated materials regarding durability." E3S Web of Conferences 550 (2024): 01044. http://dx.doi.org/10.1051/e3sconf/202455001044.

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This paper deals with the possibility of applying a surface modification coating to hybrid alkali-activated materials based on granulated blast-furnace slag activated with disodium metasilicate anhydrous with partial replacement of silica fly ash and cement by-pass dust in the amounts of 15% and 15%. The selected coatings (epoxy and synthetic) were applied in two series - the first, deposited in the water after demolding, and the second, wrapped in foil. The strength of the materials, the thickness of the coating and the effect of scaling resistance were monitored in the experiment. The compre

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Buryan, Petr, Zdeněk Bučko, and Petr Mika. "A Complex Use of the Materials Extracted from an Open-Cast Lignite Mine." Archives of Mining Sciences 59, no. 4 (2014): 1107–18. http://dx.doi.org/10.2478/amsc-2014-0077.

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Abstract The company Sokolovská uhelná, was the largest producer of city gas in the Czech Republic. After its substitution by natural gas the gasification technology became the basis of the production of electricity in the combine cycle power plant with total output 400 MW. For the possibility of gasification of liquid by- -products forming during the coal gasification a entrained-flow gasifier capable to process also alternative liquid fuels has been in installed. The concentrated waste gas with these sulphur compounds is conducted to the desulphurisation where the highly desired, pure, 96 %

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8

Tataru, Andreea Cristina, Aurora Stanci, Dorin Tataru, Mihai Sorin Radu, and Ioan Rus. "Managemnet of revegetation of the slag and ash deposits of the Paroseni Thermoelectric Power Plant." MATEC Web of Conferences 305 (2020): 00045. http://dx.doi.org/10.1051/matecconf/202030500045.

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As a result of the combustion of coal in the Paroseni Thermal Power Plant, large amounts of slag and ash waste are produced. Slag and ashes are deposited in the Caprisoara Valley slag and ash deposits. Upon completion of the deposit process, these landfills must be cleaned and reintroduced in natural circuit. An important step in the process of reintroduction in natural circuit of the deposits of slag and ashes is the implementation of some methods of revegetation. The chosen method must respect the main objectives of an environmental management system. In this paper we will present a method f

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Tataru, Andreea Cristina, Aurora Stanci, and Dorin Tataru. "Management of affected areas by the pollution of the slag and ash deposits of CET Mintia." MATEC Web of Conferences 342 (2021): 03014. http://dx.doi.org/10.1051/matecconf/202134203014.

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The technological processes from the combustion of certain materials in boilers results in significant amounts of slag and ash waste. Such industries that produce waste as slag and ash as a result of the process obtain electricity in the thermoelectric power plants. The biggest environmental problems caused by the thermoelectric power plants are air pollution and landscaping. In order to reduce the pollution caused by the slag and ash deposits, they should be ecologized upon completion of the slag and ash deposition process. An environmental management system aims at finding the most effective

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Nor, P. E., and A. S. Sviridov. "ASSESSMENT OF THE APPLICATION OF THE POSSIBILITY OF COMPLEX PROCESSING OF ASH AND SLAG WASTE AT COAL ENTERPRISES." ACTUAL ISSUES OF ENERGY 5, no. 1 (2023): 113–17. http://dx.doi.org/10.25206/2686-6935-2023-5-1-113-117.

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Currently, a huge amount of ash and slag waste is placed in the ash dumps of energy complex enterprises. This entails the alienation of large areas of land, leads to the emergence of dust storms of ash. Particles of such dust cause various lung diseases in the population of the city, as well as harm the environment. Now there is an urgent issue of processing the accumulated volume of ash and slag and high-quality processing of the newly formed waste. This paper considers the complex processing of ash and slag waste, in large-tonnage volume, with the introduction of the recovery process. The wo

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Morozov, Alexandr D., Anastasia S. Gorlenko, Lada I. Lunegova, and Alexander S. Yakovlev. "The influence of the composition and origin of ash and slag waste from coal generation on the response of organisms used in biotesting." Toxicological Review 32, no. 4 (2024): 239–47. http://dx.doi.org/10.47470/0869-7922-2024-32-4-239-247.

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Introduction. Different conditions of origin of ash and slag wastes has a significant impact on their final properties. Material and methods. The work is devoted to the search and establishment of dependencies of the influence of the origin of ash and slag waste on their chemical and biological parameters by a comprehensive assessment of the results of the impact of ash and slag waste on the vital signs of hydrobionts. Results. The values of the responses of hydrobionts for ash and slag wastes formed from coals of various origins were investigated. The component composition of aqueous extracts

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Lavygina, Olga L., and Igor G. Stepanov. "Study of the efficacy of methods for reducing dust formation on ash and slag dumps." Journal «Izvestiya vuzov. Investitsiyi. Stroyitelstvo. Nedvizhimost» 10, no. 4 (2020): 570–77. http://dx.doi.org/10.21285/2227-2917-2020-4-570-577.

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This research was aimed at analysing ash and slag dumps as objects of negative impact on atmospheric air, as well as at studying available methods for dust suppression. The existing ash and slag dump of the Novo-Irkutskaya combined heat and power plant, located in the forest park area between the cities of Irkutsk and Shelekhov, was considered. The territory adjacent to the ash dump is represented by forests in its south-eastern, eastern, and south-western parts, while the north-eastern part – by farmland. The operation of the ash and slag dump of the Novo-Irkutskaya thermal power plant leads

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13

Pak, Iurii, Dmitrii Pak, Zhmagul Nuguzhinov, and Anar Tebaeva. "Natural radioactivity of coal in the context of radioecological safety and rational use." Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, no. 1 (February 17, 2021): 97–106. http://dx.doi.org/10.21440/0536-1028-2021-1-97-106.

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Introduction. Environmental contamination with natural radioactive elements is an urgent ecological problem of the coal industry. Radiation hazard associated with natural radionuclides in coals and enclosing rock is a poorly studied problem requiring special attention. Radionuclides and their combustion products in coals, i. e. ash and slag waste and gas aerosol emissions, released into the biosphere, become the sources of pollution. Radiation monitoring is required in the course of geological prospecting, deposits development and rational use. The research aims to systematize research and ana

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G. G. Zhabalova, О. N. Onishchenko, S. N. Кamarova, and О. N. Lelikova. ""RECONSTRUCTION OF THE ASH AND SLAG REMOVAL SYSTEM IN CHP-2 OF JSC «ARSELORMITTAL TEMIRTAU»"." Bulletin of Toraighyrov University. Energetics series, no. 3.2022 (September 30, 2022): 293–303. http://dx.doi.org/10.48081/xgxz5770.

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"This article discusses the modernization of the ash and slag removal system at CHPP-2 of JSC «ArcelorMittal Temirtau», the transition from the wet method of cleaning ash and slag to a more technologically advanced dry one. The long-term use of the hydraulic ash and slag removal system (GZSHU) has led to the accumulation of a huge amount of ash, which is subsequently not used. A comprehensive replacement of wet cleaning equipment for dry cleaning is considered. The wet method offers quenching with water (in this case, up to 1 % of the thermal efficiency of the TP-81 boiler unit is lost), follo

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15

BUDINA, T. S., N. Kh KURBANOV, L. M. PROKOFIEVA, and V. G. SHIYKO. "INDUSTRIAL WESTE ACCOUNTING ON EXAMPLE ASH DUMPS." EKONOMIKA I UPRAVLENIE: PROBLEMY, RESHENIYA 4, no. 4 (2021): 182–88. http://dx.doi.org/10.36871/ek.up.p.r.2021.04.04.033.

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The article is devoted to the problems of accounting for industrial waste (technogenic deposits) on the example of ash and slag dumps. The influence of the organization of accounting for technogenic deposits on the indicators of cost, profit, and profitability of the enterprise, if these wastes are sold or used as secondary material, is studied. It is proved that the accounting system should accumulate and form such information that would allow with a sufficient degree of accuracy to determine the economic efficiency of the integrated use of raw materials, would aim at identifying reserves for

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16

Bílek Jr., Vlastimil, Lukáš Kalina, Eva Bartoníčková, and Tomáš Opravil. "Influence of Industrial By-Products on Shrinkage of Alkali-Activated Slag." Advanced Materials Research 1000 (August 2014): 137–40. http://dx.doi.org/10.4028/www.scientific.net/amr.1000.137.

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One of the highest shortages of alkali-activated slag (AAS) is high shrinkage, both autogenous and drying. One of the possibilities of lowering the shrinkage is partial replacement of slag by suitable admixtures, which can act for example through the forming of expansive hydration products. In this study, 0–50 % of slag was replaced by by-pass cement kiln dust and fluidized bed combustion fly ash. Promising results were obtained especially in the case of fly ash. By using admixtures at higher dosages compressive strengths were reduced.

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17

Nicorescu, Valeria, Smaranda Masu, Ladislau Andres, et al. "Strategy for Ecologically Closure of Ash and Slag Deposits Using Energetic Crops." Revista de Chimie 69, no. 1 (2018): 45–49. http://dx.doi.org/10.37358/rc.18.1.6042.

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In the field of renewable energy, national targets imposed by the European Directive on promoting the use of energy from renewable sources is to reach 24% of gross final consumption of energy by 2020. This paper presents a solution for this target and for sustainable management of ash and slag closed deposits by plantation of energetic crops. Process of plantation was assessed by tracking energetic crops by determining the capacity of metals accumulation in wood biomass, correlations between the crops diameter and height, chemical composition of ash. The obtained data were compared with simila

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Delitsyn, L. M., R. V. Kulumbegov, Yu V. Ryabov, V. B. Petropavlovskaya, and M. G. Sulman. "A Promising Method of Utilization of Ash and Slag Waste of Variable Composition at Coal-fired Power Plants." Ecology and Industry of Russia 25, no. 9 (2021): 18–23. http://dx.doi.org/10.18412/1816-0395-2021-9-18-23.

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A comparative analysis of ash and slag waste (ASW) of six deposits, differing in quantitative chemical and phase composition, granulometry, melting temperature and other properties, is presented, and the production of a material promising for the construction industry is proposed – aggloporite, the production technology of which practically does not depend on the composition and properties of TPP ash. Aggloporite can also be used in road construction to form side slopes. The proposed method of recovery of large volumes of ash and slag waste accumulated at a number of power plants opens up oppo

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Bainazarova, T. B., G. B. Toychibekova, U. A. Serik, K. T. Abdraimova, and G. S. Shalabaeva. "WAYS TO RECYCLE THERMAL POWER PLANT EMISSIONS IN IMPROVING ENVIRONMENTAL QUALITY." Hydrometeorology and Ecology 115, no. 4 (2025): 138–51. https://doi.org/10.54668/2789-6323-2024-115-4-138-151.

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This article analyzes modern methods of recycling ash and slag waste generated by coal combustion in thermal power plants, as well as their impact on the environment. Currently, the problem of industrial and household waste is becoming increasingly urgent, with ash and slag waste being among the largest in terms of volume. These waste materials pose a risk of environmental contamination with toxic substances and heavy metals. Dust is generated in areas affected by ash dumps, and the components of the ash are washed away, leading to their infiltration into the soil and groundwater, which worsen

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Nur Rohman, Muhammad, Bertinus Simanihuruk, and Hikma Dewita. "Karakteristik Beton Mutu FC 30 Dengan Menggunakan Limbah Peleburan Baja (Slag) Dan Pembakaran Batubara (Fly Ash)." Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi 5, no. 1 (2025): 61–65. https://doi.org/10.47970/snarstek.v2i1.771.

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The use of slag and fly ash waste for building materials is not optimal, because it contains heavy metal oxides. With the issuance of Government Regulation no. 22 of 2021, dust resulting from burning coal from Steam Power Plants and other activities is not included as B3 waste. With research on the use of fly ash and slag to increase the compressive strength of concrete, research was carried out in the laboratory to determine the optimal composition for the use of slag and fly ash as a substitute for coarse aggregate and cement in concrete mixtures. By testing in the laboratory, results were o

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Cherkasova, Tatiana, Elizaveta Cherkasova, Anastasia Tikhomirova, Andrey Golovachev, and Oleg Dormeshkin. "Study of the Processes of Rare and Rare-Earth Metal Extraction from Ash and Slag Materials." E3S Web of Conferences 174 (2020): 02031. http://dx.doi.org/10.1051/e3sconf/202017402031.

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The problem of disposal of ash and slag waste in Russia and in the world is very urgent. Ash dumps occupy vast areas, damaging the ecosystem. At the same time, these wastes are independent deposits of rare and rare-earth metals, which are necessary for the production of modern high-tech devices. The efficiency of flotation and chemical methods of concentration of materials in order to extract valuable components are evaluated in the paper. The composition of the initial ash and slag samples and the resulting products of their processing were analyzed using IR spectroscopic and optical emission

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Shepelev, I. I., O. V. Pilyaeva, N. V. Golovnykh, and V. A. Prigarin. "The Use of Waste from Thermal Power Plants as a Raw Material Additive in the Process of Producing Alumina from Nepheline Ores." Ecology and Industry of Russia 29, no. 6 (2025): 16–21. https://doi.org/10.18412/1816-0395-2025-6-16-21.

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The possibility of using ash and slag waste from thermal power plants in our country as an alumina additive in a limestone-nepheline charge has been investigated and criteria were established for the initial ash content in coal deposits – the Al/Si ratio is not lower than 0.30–0.35 and the Al2O3 content is above 27 %. The physico-chemical patterns of the formation of the mineral composition of ash and slag waste and its effect on the technological parameters of sintering alumina charge and the quality of the resulting sinter are shown. Based on laboratory and industrial studies, it is recommen

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MAHALAKSHMI NAIDU, PEELA, and M. GOWRI. "STUDIES ON ALTERNATIVE MATERIALS FOR THE IMPROVEMENT OF SUBGRADE AND SUBBASE." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, no. 11 (2023): 1–11. http://dx.doi.org/10.55041/ijsrem27363.

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This study looks into the viability of using alternative materials, such as Quarry Dust (QD), Saw Dust, Copper Slag (CS), and Fly Ash (FA), to improve the subgrade and subbase in road construction. The deterioration of conventional subgrade and subbase materials, which frequently result in road failures and costly maintenance, necessitates the investigation of sustainable and cost-effective alternatives. The study evaluates the engineering attributes and performance characteristics of various alternative materials using laboratory experiments, field evaluations, and numerical modelling. The re

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A.Y., Iorliam, Opukumo A.W., and Anum B. "Carbon Capture Potential in Waste Modified Soils: A Review." International Journal of Mechanical and Civil Engineering 5, no. 1 (2022): 25–38. http://dx.doi.org/10.52589/ijmce-x4j0etuu.

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Carbonation of lime modified soil could capture carbon dioxide (CO_2) alongside strength improvement for road pavement materials. Due to large amounts of 〖CO〗_2 emissions and increasing cost of primary soil stabilizers such as lime and cement, the use of lime-based wastes have been encouraged. This paper reviews waste materials based on separate potential for 〖CO〗_2 capture and strength improvement of soils. Such wastes include cement kiln dust (CKD), saw dust ash (SDA), steel slag, basic oxygen steel (BOS) slag, ground granulated blast furnace slag (GGBS), coal fly ash (CFA) and cattle bone p

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Katalambula, H. "Modelling of Coal Slag flow and Layer Thickness in a High Temperature Entrained Flow Gasifier." Tanzania Journal of Engineering and Technology 32, no. 1 (2009): 9–17. http://dx.doi.org/10.52339/tjet.v32i1.541.

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A 2-D model for the slag flow simulation in an entrained flow gasifier has been developed. In addition tomass, momentum and energy conservation equations, volume of fluid (VOF) equation was solved to track theliquid-gas interface. Liquid phase consists of melted coal ash particles which deposits on the wall and movedownward. The gasification reaction is not considered here but it is postulated to have a mass flow throughthe interface towards the mass of the liquid phase. The reactor walls are usually kept cold so a temperaturegradient and then a solid layer form within the slag layer. The soli

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Fukui, Tunekazu, Tadahiro Murakami, and Muneharu Ichikawa. "The behavior of ash components in the sludge melting process." Water Science and Technology 30, no. 8 (1994): 197–207. http://dx.doi.org/10.2166/wst.1994.0410.

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The Coke-bed sludge melting process is used for incinerating sewage sludge and producing slag that is recycled as construction materials. The behavior of ash exiting the melting furnace was examined. Heating tests were carried out with different kinds of sludge. Heating from 600°C to 1200°C, weight reduction of around 30% was measured, but reduction rate was due to the kind of sludge. Weight reduction was big when heating up to 815°C, and reduction at a temperature over 815°C was due to the type of sludge. Main materials causing weight reduction were unburnt carbon (C) and some other elements

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San, San Myint. "Experimental Research on the Strength of Concrete for Local Cement with Various Replacement Materials." International Journal of Trend in Scientific Research and Development 3, no. 4 (2019): 1575–80. https://doi.org/10.5281/zenodo.3591370.

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The main purpose of this paper is to study the effects of "Various replacement materials for cement in concrete strength. Materials used in this research are abundant in Mandalay, Myanmar. In this paper, the chemical composition and physical properties of AAA cement is analysed. Cement replacement materials used in this research are blast furnace slag powder which is obtained from iron and steel industry from Mandalay Industrial Zone, fly ash, and granite quarry dust which obtained from BaeLin, KyaukSe. The physical properties of cement, blast furnace slag powder, fly ash and granite quar

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Devendra, Singh, and Rathore Harsh. "Sustainable Soil Stabilization and Pavement Improvement Using Quarry Dust, Copper Slag, Fly Ash, and Plastic Waste: A Review." Journal of Advances in Civil Engineering and Management 8, no. 2 (2025): 48–52. https://doi.org/10.5281/zenodo.15239596.

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<em>Expansive soils pose significant challenges to infrastructure development due to their swelling and shrinkage behavior. This review explores the utilization of waste materials such as Quarry Dust (QD), Copper Slag (CS), Fly Ash (FA), and Plastic Waste (PW) for soil stabilization and pavement construction. Quarry Dust enhances soil strength and compaction characteristics, with optimal improvements observed at 10-40% replacement levels. Copper Slag, with its high stability and interlocking properties, significantly improves the load-bearing capacity of subgrades. Fly Ash, particularly in hig

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Gonchar, N. V., A. B. Makarov, O. M. Guman, and I. A. Antonova. "Snow survey within the copper ore deposits in the mining regions of the Urals." Vestnik MGTU 27, no. 2 (2024): 158–69. http://dx.doi.org/10.21443/1560-9278-2024-27-2-158-169.

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The paper presents the results of studies of dust residues of snow cover within various climatic zones and copper deposits of the Ural region. Snow cover research is one of the methods for environmental assessment of territories. This concerns the study of dust residues from snow cover samples, as shown by the example of the territories of the Northern and Southern Urals at different stages of work on copper deposits. The initial stage of study and development is considered using the example of porphyry copper deposits in the Chelyabinsk region, where snow samples reveal organic matter in dust

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Tyshchenkova, M. O., V. N. Fylyn, V. V. Selyvanov, and V. L. Pechenyi. "Dust-oppression on ash slag from CHP using water-soluble polymers." Ecological Sciences 4 (2018): 60–62. http://dx.doi.org/10.32846/2306-9716-2018-4-23-13.

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Saleh, Nasser M., Mohie Elmashad, Waleed Dawood, and M. M. AbdelMonem. "Effect of installing columns from different solid waste materials on the soft clay bearing capacity." E3S Web of Conferences 368 (2023): 02032. http://dx.doi.org/10.1051/e3sconf/202336802032.

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Soft clay deposits cause many problems due to low bearing capacity and high deformation. This paper presents the results of laboratory model tests for studying the improvement of soft clay-bearing capacity using two kinds of soil columns, the first is slag-cement dust columns and the second is bentonite column. Three columns from SCC (slag-cement dust columns) encased by Woven Geotextile are installed beneath a steel plate representing a footing. Four bentonite Columns (BC) encased with non-woven geotextile are installed around the steel plate at a distance of 1 B, where B is steel plate width

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Wang, Xin, Yurong Yan, Xiaofang Tong, and Yongfan Gong. "Investigation of Mineral Admixtures on Mechanical Properties of Alkali-Activated Recycled Concrete Powders Cement." Buildings 12, no. 8 (2022): 1234. http://dx.doi.org/10.3390/buildings12081234.

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Recycled concrete powders (RCPs) are collected during the treatment of recycled aggregates using devices that suction dust. However, RCPs have not been effectively utilized as mineral admixtures in concrete due to their low activity and high capacity for water absorption. In this study, alkali-activated recycled concrete powders cement (AARCPC) was prepared using chemical activation, and then the composition, fluidity, setting time, strength and micro-structure of hydration products in AARCPC were studied. We found that the addition of mineral admixtures significantly improved the strength of

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Golik, Vladimir, Yury Dmitrak, Vitaly Komashchenko, and Nikolay Kachurin. "Management of hardening mixtures properties when stowing mining sites of ore deposits." Journal of Mining Institute 243 (June 13, 2020): 285. http://dx.doi.org/10.31897/pmi.2020.3.285.

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Underground mining is characterized by the weakening of the bearing rock mass strata competence and the accumulation of mineral waste. The full use of subsurface resources is ensured by the use of technologies with filling voids by hardening mixtures, which requires high-quality raw materials to obtain the required strength. The deficit of the binding component can be filled with the use of granulated slags of blast-furnace process, mill tailings, ash-slags and other wastes. Most often, voids are laid by mixtures with a combination of cement and a binding component. Mixtures with ash-slag addi

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Bílek Jr., Vlastimil, Ladislav Pařízek, Petr Kosár, Jiří Kratochvíl, and Lukáš Kalina. "Strength and Porosity of Materials on the Basis of Blast Furnace Slag Activated by Liquid Sodium Silicate." Materials Science Forum 851 (April 2016): 45–50. http://dx.doi.org/10.4028/www.scientific.net/msf.851.45.

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This study investigates the effect of different admixtures on strength and porosity development of mortars and pastes based on alkali activated blast furnace slag (AABFS). Fluidized bed combustion fly ash and by-pass cement kiln dust were used to replace slag in the binder by 5%wt. and 10%wt., respectively. Pure slag mortar was also modified by a shrinkage reducing admixture. The use of all the admixtures resulted in a reduction in early age strength, while only shrinkage reducing admixture had significant impact on pore size distribution. Properties of AABFS based specimens were compared to t

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Suganya, S., and V. Rajkumar. "Significant effects of cementitious materials on strength gain properties of concrete with partial replacement of fine aggregate by quarry dust." International Journal of Engineering & Technology 7, no. 4 (2018): 2051. http://dx.doi.org/10.14419/ijet.v7i4.16064.

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Concrete incorporates large amount of natural resource as aggregates with cement and water. Cement production consumes huge energy and causes about 7% of total greenhouse gas emission in the world. It has been strived to provide better quality in concrete using waste by-products from industries so that natural resources are used in an efficient manner and thereby the environment is protected from waste deposits. Hence, mineral admixtures like fly ash and micro silica can be used to overcome these issues. The demand for river sand is getting increased day by day, which affects its constant supp

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Volkov, Anton, Ulyana Kologrieva, and Pavel Stulov. "Study of Forms of Compounds of Vanadium and Other Elements in Samples of Pyrometallurgical Enrichment of Ash from Burning Oil Combustion at Thermal Power Plants." Materials 15, no. 23 (2022): 8596. http://dx.doi.org/10.3390/ma15238596.

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The results of the processing of ash from the combustion of fuel oil after roasting with the addition of Na2CO3 followed by aluminothermic melting are presented. As a result, metallic nickel and vanadium slag were obtained. Studies of slag, metal, and deposits on the electrode were carried out. The resulting metal contains about 90 wt% Ni. The main phases of scurf on the electrode are a solid solution based on periclase (Mg1–x–y–zNixFeyVzO), sodium-magnesium vanadate (NaMg4(VO4)3), and substituted forsterite (Mg2–x–yFexNiySiO4). The processing of ash made it possible to significantly increase

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Sokolov, Oleksiy. "DETERMINATION OF MODULUS OF ELASTICITY OF ASPHALT CONCRETE WITH FLY ASH USING THE WITCZAK MODEL." AUTOMOBILE ROADS AND ROAD CONSTRUCTION, no. 115.1 (2024): 049–56. http://dx.doi.org/10.33744/0365-8171-2024-115.1-049-056.

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Summary. In Ukraine, about 30% of all electricity is produced by burning solid fuels - coal, shale, and peat. In our country, there are about 15 operating thermal power plants, which generate about 5-6 million tons of ash and slag waste as a secondary product per year. Thus, the waste of the fuel and energy complex, which is formed in the furnaces of thermal power plants, is a huge accumulation of ash in the form of dust-like residues and lumpy sludge, as well as various ash-slag mixtures. These products of high-temperature processing (1200-1700 ºС) of the mineral part of the fuel are widely u

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Chee Ban, Cheah, Tan Leng Ee, Mahyuddin Ramli, Hazizan Bin Md Akil, and Kim Hung Mo. "Properties and microstructure of lime kiln dust activated slag-fly ash mortar." Construction and Building Materials 347 (September 2022): 128518. http://dx.doi.org/10.1016/j.conbuildmat.2022.128518.

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Tishchenkova, M., V. Filin та T. Ivashchenko. "Теchnological efficiency of polyacrylamide dust protective cases on ash and slag dumps". Ecological Sciences 1, № 2 (2020): 58–62. http://dx.doi.org/10.32846/2306-9716/2020.eco.2-29.1.9.

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Su, Shan Shan, Yong Lu, and Yang Hui. "The Study of PCDD/Fs Distribution in a Medical Waste Incinerator." Advanced Materials Research 356-360 (October 2011): 2643–46. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.2643.

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Although there were many studies focused on the PCDD/Fs emissions from different incinerators, but the emissions in a whole plant have seldom been reported. This paper investigated the distributions and congener profiles of the PCDD/Fs in the stack gas, fly ash, dust in the precipitator and slag from an whole medical waste incinerator. The result showed that 1) the PCDD/Fs of the dust in the precipitator had the highest level in all the samples. 2) 2,3,7,8-TCDD was the important characteristic factor in the TEQ values of most samples.

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Praveen, R., S. Sai Amarthiya Ragav, J. Athimuthu, P. Maya Kannan, and P. Rajeswaran. "MECHANICAL PROPERTIES OF GREEN TERNARY- BLENDED - GEOPOLYMERS BINDER." International Journal of Advanced Research 12, no. 03 (2024): 237–43. http://dx.doi.org/10.21474/ijar01/18388.

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Many industrial-wastes/clays, such as fly ash (FA), ground granulated blast-furnace slag (GGBS), brick kiln dust (BDK), are employed in developing geopolymeric materials used in the constructionsector. Accordingly, this work aims to find a green approach to benefit from the synergistic impacts of the precursors in developing ternary-blended geopolymers (GGBFS/FA/BKD) having multifunctional engineering applications. Five mixes were prepared: the control specimen and the others contained different portions from GGBS, FA, and BKD. All mixes were cured in high humidity for up to 28-days. The vario

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Harmaji, Andrie, and Bambang Sunendar. "Utilization of Fly Ash, Red Mud, and Electric Arc Furnace Dust Slag for Geopolymer." Materials Science Forum 841 (January 2016): 157–61. http://dx.doi.org/10.4028/www.scientific.net/msf.841.157.

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Geopolymer is an aluminosilicate material that can be prepared from thermal activation of solid material containing alumina and silica as precursor and alkali activator solution. The precursor is an eco-friendly material and has a potency to replace Portland cement (cementless material). In this work, cementless geopolymer mortar was prepared by mixing fly ash as main precursors, red mud, and electric arc furnace dust slag, followed by addition of activator solution containing sodium hydroxide solution and waterglass. X-ray diffraction and Fourier transform infra-red spectroscopy demonstrated

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Danish, Aamar, Ermedin Totiç, Muhammed Bayram, et al. "Assessment of Mineralogical Characteristics of Clays and the Effect of Waste Materials on Their Index Properties for the Production of Bricks." Materials 15, no. 24 (2022): 8908. http://dx.doi.org/10.3390/ma15248908.

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Significant research investigations on the characteristics of unexplored clay deposits are being conducted in light of the growing need for clay in the ceramic industry and the variable chemistry of clays. Parallel to this, the generation of waste materials like fly ash, ferrochrome slag, and silica fume is also increasing, responsible for environmental degradation. This paper aims to study the mineralogical properties of pure clays (one specimen from Siberia and five specimens from different locations in Turkey), and the effect of mentioned waste materials on the index properties of clays obt

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Lunev, A. A. "MECHANICAL STRENGHT’S RESEARCH OF THE THERMAL POWER STATION’S SLAG." Russian Automobile and Highway Industry Journal 16, no. 6 (2019): 746–57. http://dx.doi.org/10.26518/2071-7296-2019-6-746-757.

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Introduction. The use of the thermal power station’s (TPS) waste in the construction industry becomes the norm in world practice of recent decades. Basically, the researches use ash and slag in the construction of automobile roads as a material for filling the subgrade or in the form of a cement-bound material in industrial and civil construction as a material for planning work, when filling inconveniences and quarries. However, the potential of the ash and slag’s usage is much wider. Coarse-grained slag deposits that form in the zone of slag erosion have a greater potential for application th

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Cai, Ji Wei, Guang Liang Gao, Rui Ying Bai, Li Xue Yu, and Shao Jun Wang. "Research on Slaked Magnesium Slag as a Mineral Admixture for Concrete." Advanced Materials Research 287-290 (July 2011): 922–25. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.922.

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The magnesium slag is discarded from production of magnesium metal from dolomite. However the magnesium slag is slaked in some factories by means of sprinkling water to prevent from dust pollution. The possibility of slaked magnesium slag (SMS) to play a role of mineral admixture for concrete was investigated by experiments of mortars and concretes prepared with SMS. The results revealed that SMS was still reactive. When SMS is substituted for 30% of cement, its reactivity index is equivalent to that of grade I fly ash (FA). And when SMS is used as mineral admixture to prepare concrete, it con

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Cai, Ji Wei, Guang Liang Gao, Rui Ying Bai, Feng Lu, and Ling Li. "Research on Slaked Magnesium Slag as a Raw Material and Blend for Portland Cement." Advanced Materials Research 335-336 (September 2011): 1246–49. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.1246.

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The magnesium slag is discarded from production of magnesium metal from dolomite. However the magnesium slag is slaked in some factories by means of sprinkling water to prevent from dust pollution. The possibility of slaked magnesium slag (SMS) to play a role of raw material and blend for portland cement was investigated by experiments of raw mix preparation, clinker calcining and property determination of cement pastes and mortars. The results revealed that SMS was still reactive. The raw mix with SMS was of excellent burnability that would contribute to energy saving. As a raw material, SMS

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Lokesh, S., and P. Chandrasekaran. "Mechanical and durability performance of sustainable concrete with the inclusion of alternative fine aggregate." Materials Express 13, no. 1 (2023): 147–58. http://dx.doi.org/10.1166/mex.2023.2320.

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Natural river sand has become less readily available in recent years due to the expansion of the building sector. Due to the scarcity of river sand, researchers seek an alternative fine aggregate material that does not compromise strength and durability. The sustainability advantages of using coal bottom ash, steel slag, eco sand, and quarry dust as a potential substitute for traditional fine aggregates can be attributed to the following: the eradication of the necessity to discard these wastes in landfills, as well as the provision of an alternate source for natural raw materials. Consequentl

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G, Chidananda. "Mechanical and Durability Characteristics of Eco-Friendly Fly Ash Bricks." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (2021): 1381–85. http://dx.doi.org/10.22214/ijraset.2021.39034.

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Abstract: This paper presents an experimental investigation carried out on eco-friendly fly ash bricks having various percentage of fly ash, lime, gypsum, stone dust, coarse aggregate and boiler slag. Raw materials are added to the pan mixer with different mix proportions and are mixed thoroughly with water until a homogeneous mixture is formed. Prepared homogeneous mixture is fed into the press and moulded to a brick of size 200 x 200 x 300 mm using vibro-hydraulic press. Moulded bricks are air dried for 24 hours, arranged in stacks and are cured for a period of 28 days by sprinkling the wate

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Li, Yi Shan, Zheng Liang Xue, En Tang, Qiang Liu, Wei Xiang Wang, and Dong Nan Zhao. "Research on the Recovery of Secondary Iron-Bearing Dust in Direct Reduction of Carbon Composite Pellets." Advanced Materials Research 524-527 (May 2012): 2031–36. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.2031.

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In order to recover secondary iron-bearing dust, with converter sludge, mill scale, gravitational ash, casthouse ash as raw materials, high basicity carbon composite pellets are prepared to make iron nuggets through self-reduction at high temperature. The study demonstrates that: The effectively separation of iron and slag, naturally pulverization of the slag phase, and good surface quality of bigger, glosser and brighter iron nuggets can be obtained with reduction temperature 1400 °C,C/O molar ratio 1.1,as well as basicity above 1.8 in this process; The iron phase is not generated well and pr

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Liu, Chunyu, Weixing Wang, Xiwei Qi, et al. "Numerical Simulation of Heat Transfer of Roller Slag in Centrifugal Preparation of Inorganic Fiber." Processes 11, no. 11 (2023): 3225. http://dx.doi.org/10.3390/pr11113225.

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The synergistic preparation of aluminum silicate ceramic fibers from dust removal ash and fly ash is a newly developed process that achieves green and high added value treatment of solid waste. In this process, the centrifugal fiber forming method is used to treat molten slag to obtain aluminum silicate ceramic fibers. During the production process, the centrifugal roller, as a key component in fiber forming, is in long-term contact with high-temperature slag. The heat transfer between the two causes a huge temperature gradient inside the roller material, causing significant thermal stress ins

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