The strength property of limestone calcined gangue cement with 45% replacement of clinker was higher than reference cement (CEM I 42.5 N) on 7 and 28 days. ... 3.1 Mineralogical Composition of Coal Gangue. The chemical composition of coal gangue sample by XRF analysis was shown in Table ...
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DOI: 10.1016/j.scp.2023.101402 Corpus ID: 266831132; Representative coal gangue in China: Physical and chemical properties, heavy metal coupling mechanism and risk assessment
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Semantic Scholar extracted view of "Preparation and characterization of ZSM-5 molecular sieve using coal gangue as a raw material via solvent-free method: Adsorption performance tests for heavy metal ions and methylene blue." by Jida Gao et al.
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Coal gangue (CG) is a type of industrial solid waste produced by the process of coal excavation and separation 1,2,3.Generally, one ton of CG is discarded for every 10 tons of produced coal 4,5. ...
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In this study, the calcined CG (CG700 C) was used as aluminosilicate precursors, and the effects of alkali activators (i.e., Na2SiO3/NaOH, NaOH …
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Secondly, the soil in coal gangue wasteland usually has many physical and chemical properties, such as poor physical structure, poor water and fertilizer holding capacity, extremely barren or unbalanced nutrient, high heavy metal content, and so on, in particular, high levels of heavy metals will cause long-lasting and almost irreversible ...
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Activation Mechanism of Coal Gangue and Its Impact on the Properties of Geopolymers: A Review. Ruicong Han, 1 Xiaoning Guo, 1 Junfeng ... Wang X.D., Zhang Z.T. Effects of chemistry and mineral on structural evolution and chemical reactivity of coal gangue during calcination: Towards efficient utilization. Mater. Struct. 2015; …
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In the construction field, coal gangue has also been used to make bricks, concrete blocks, mosaics, fired-glazed floor tiles, lightweight aggregate and other low value-added building materials [8], [16], [17].At present, coal gangue can partly or completely replace clay for aluminum adjustment in cement clinker production [18], [19]. In fact, the …
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The leaching characteristics of trace elements in fresh, weathering, and filling coal gangue are different. During coal gangue combustion, the trace elements …
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China's total coal production in 2021 exceeded 4.13 billion tons, 52% of the world's total. Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly discharged on the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution. This paper summarizes the …
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The great change occurs in the physico-chemical properties of coal gangue exposed to the ground's surface within 2 a. It shows that the weathering is significant. Of course, the temperature effect and hydrolysis as well as other physical processes play the role in the process. Lumpiness decrease of coal gangue due to physical weathering can ...
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Coal gangue was added as a silicate source of the ceramsite to facilitate celsian formation [37], [38]. The coal gangue was produced by Huainan Dongchen Group in Anhui Province, China. Its chemical composition is also specified in Table 1. Boric anhydride was used to reduce the sintering temperature and improve the neutron …
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DOI: 10.1016/j.clay.2022.106730 Corpus ID: 253136157; Enhanced adsorption properties of polyoxometalates/coal gangue composite:The key role of kaolinite-rich coal gangue @article{Zhang2023EnhancedAP, title={Enhanced adsorption properties of polyoxometalates/coal gangue composite:The key role of kaolinite-rich …
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The amount of coal gangue, a by-product of coal mining and washing, is rapidly increasing with the growing trend of energy consumption. The accumulated coal …
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The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coal-mined land with a high groundwater table. Hydrol. Process ...
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Coal mining is indispensable due to the widespread use of coal, and gangue is the accumulated solid waste byproduct that persists in mined lands, even after the mines have been abandoned 1.In the ...
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The coal gangue in China is the core field of bulk solid waste comprehensive utilization due to its massive stock and emission, high concentration of output, small proportion of high-value-added utilization, and outstanding environmental impact. Hence, the prospect of resource utilization of coal gangue is broad. The existing disposal …
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DOI: 10.1016/j.conbuildmat.2023.133747 Corpus ID: 264085396; Mechanical properties and micro characterization of coal slime water-based cementitious material-gangue filling: A novel method for co-treatment of mining waste
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The substrate made of coal gangue has more inferior physical-chemical properties. Considering the indicators, the conclusion is that several indicators of B test plot are better than the others, so a soil depth of 70-80 cm is a more economical and rational top-soil depth for reclaimed land when using coal gangue as a filler.
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The amount of coal gangue, a by-product of coal mining and washing, is rapidly increasing with the growing trend of energy consumption. The accumulated coal gangue without appropriate utilization has resulted in a squander of resources, waste disposal and environmental pollution issues. Over the past few decades, there has been …
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Chemical properties and combustion behavior of constituent relative density fraction of a thermal coal. ... ABSTRACT To determine the effect of water contents on the oxidation spontaneous combustion of coal gangue, the properties and combustion characteristics of coal gangue were studied using industrial … Expand. 3. 1 Excerpt;
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The results suggested that coal gangue significantly influences soil S, pH and plant species after 8 years of natural recovery.
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1. Introduction. Coal is the most widely consumed source of energy in China [1].Coal gangue is a residue from the coal mining and washing process [2].On a mass basis, coal gangue accounts for approximately 10–15% of the total coal produced [3].Hence, coal gangue is one of the largest sources of industrial solid waste in China.
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Utilizing coal gangue in cement production not only addresses the raw material shortage but also offers a sustainable solution for managing industrial waste. The activation of coal gangue involves thermal treatment to enhance its pozzolanic …
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Coal gangue is the largest amount of industrial solid waste in China. It caused serious damage to the ecological environment and waste resources. Therefore, it is of great significance to realize the resource utilization of coal gangue, protecting the environment and realizing the sustainable development of society. This paper …
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Chemical properties of the coal gangue predominantly comprise quartz, feldspar, clay minerals, carbonates, and sometimes pyrite [3, 6, 7]. The composition varies based on the geological characteristics of the coal seam. Depending on the geological formation, coal gangue may contain trace amounts of heavy metals.
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Historical experience shows that a large number of coal gangue will be produce in the development of coal process. ... Stewart, B.R., Daniels, W.L.: Physical and chemical properties of coal refuse from southwest ia. Environ. Qual. 21, 635–642 (1992) Article Google Scholar Wang, H., Hao, Q., Yin, E.: A Study on Water Pollution …
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coal-gangue-based silicon fertilizer, and its reliability veri-ed, thereby providing a theoretical basis for use of coal-gangue-based silicon fertilizer in agriculture. Materials and methods Materials Coal gangue The coal gangue used in the experiment comes from the Shendong mining area in Inner Mongolia, China, with an ash content of~ 85.60%.
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The results indicate: the setting times of cement mixed with kiln dust-activated coal gangue is delayed and the early strength and later strength of cement with 10% kiln dust-activated coal gangue ...
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