Coal gangue is a rock mixed with organic and inorganic compounds co-deposited with coal during coal formation. Usually in a thin layer and in the coal seam or in the top and bottom of the coal seam, gangue is typical solid waste discharged when coal is excavated and washed in the production. In China, the total of accumulative stockpile of …
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In the process of coal resource mining and consumption utilization, a large amount of coal gangue solid waste is accompanied 1,2.At present, the western mining area has become the main production ...
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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 …
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Coal gangue has accumulated huge coal gangue piles, occupying lots of land as well as having striking influence on the neighboring environmental effects. This paper seeks a new way of coal …
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Global rise in greenhouse gas emissions (GHG) is triggered mainly due to the consumption of fossil fuels for power generation and domestic usage. Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process. Coal gangue, a residue produced during the …
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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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DOI: 10.1016/j.jhazmat.2023.132707 Corpus ID: 263725567; Understanding the release, migration, and risk of heavy metals in coal gangue: An approach by combining experimental and computational investigations.
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Coal gangue with calorific value of 6270 to 12550 kJ/kg can be directly fired in fluidized-bed boilers. Power generation is the most effective way of utilizing coal gangue in China which brings considerable environmental and economical benefits. Not only this may resolve the environmental pollution problems caused by the disposal of gangue, but ...
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Activation of coal gangue from Yixing was done by the method of addition of calcium during calcination. Structural characteristic and cementitious properties of activated samples were analyzed. And then hydration degree of activated coal gangue cement was studied. The results show that: thermally and chemically added-calcium composite …
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Coal gangue is a problematic by-product generated from the process of mining and beneficiation of coal. It approximately accounts for 10–15 mass % of coal production [].Huge quantities of coal gangue has been stockpiled during decades of coal production and cause severe environmental impacts, such as acid drainage, heavy …
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Coal gangue has become a significant industrial solid waste because it pollutes the environment and is prone to spontaneous combustion. Recycling is the way of the future. This blog aims to explore 8 effective and environmentally friendly ways to maximize the value of coal gangue. 1. Coal gangue replaces clay to make cement
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Coal gangue is one of the largest industrial residues. It has high ash content, low carbonaceous content, and heating value. Meanwhile, it has some trace elements. Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land. …
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Introduces the status of beneficial and comprehensive utilization of coal gangue in China and foreign countries and some approaches for beneficial and comprehensive utilization of coal gangue in Shanxi Province,analyzes the situation faced by and problems existing in Shanxi's comprehensive utilization of coal gangue,and puts forward several …
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Coal gangue, as a type of solid waste discharged during coal mining and coal washing, occupies a large amount of land resources owing to accumulated …
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The diffusion characteristics of fine-grained gangue slurry are significant for gangue consumption and ecological environment protection, especially in underground mines. Therefore, based on the theory of porous medium transportation, this paper establishes a 3D caving zone model, proposes methods for reconstructing, statistical, …
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The coal industry is an important pillar industry of economic development in China, with coal mining produced a lot of coal gangue, which is occupied land, and pollution of the environment, and the production and life of coal-producing areas have been seriously affected, coal gangue has become a heavy burden restricting the sustainable …
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Coal gangue, as a type of solid waste discharged during coal mining and coal washing, occupies a large amount of land resources owing to accumulated gangue, which eventually results in ecological ...
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Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining. A …
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Coal gangue is the solid waste generated and discharged in coal mining and mineral processing, accounting for 10%–15% of the raw coal production. At present, the reserves of coal gangue have exceeded 7 billion tons in China, primarily occurring in China's bulk industrial solid waste emissions (Zhao et al. 2022; Ma et al. 2021).
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This study studied the characteristics and source apportionment of heavy metal pollution in the agricultural soil surrounding a gangue coal heap in Chongqing, China by using absolute principal component scores-multiple linear regression (APCS-MLR) model and positive matrix factorization (PMF) model. The applicability of the models was compared in the …
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Leaching was an important way of hazardous trace elements from coal gangue causing environment pollution. Based on the leaching experiments of coal gangue from some mining area in Henan, the changing regularities of pH values and leaching contents of hazardous trace elements from coal gangue were studied. The different …
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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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Coal gangue image recognition is a critical technology for achieving automatic separation in coal processing, characterized by its rapid, environmentally friendly, and energy-saving nature. However, the response characteristics of coal and gangue vary greatly under different illuminance conditions, which poses challenges to the stability of …
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Coal gangue power generation Coal gangue grinding adopts fluidized bed technology. When the carbon content is greater than 20%, it can be used as energy and can be used to generate electricity. Recycling of coal and pyrite Coal gangue adopts composite dry coal preparation, cyclone, and heavy medium separation. When the coal …
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Corresponding Author. Nong Zhang [email protected] School of Physics and New Energy, Xuzhou University of Technology, Xuzhou, Jiangsu, China. National Key Laboratory of Fine Coal Exploration and Intelligent Development, China University of Mining and Technology, Xuzhou, Jiangsu, China
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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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Coal gangue has accumulated huge coal gangue piles, occupying lots of land as well as having striking influence on the neighboring environmental effects. This paper seeks a new way of coal gangue treatment in which the coal gangue blended with shale and sludge was sintered in rotary kiln to form lightweight aggregates.
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Coal gangue is a complex industrial solid waste mixed with organic compounds, inorganic compounds and minerals (Fabiańska et al. 2013).Its major chemical compositions are SiO 2, Al 2 O 3 and Fe 2 O 3, with traces of CaO, P 2 O 5, MgO and …
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Coal gangue, which is mainly generated during coal excavation, mining, and coal washing, is an industrial solid waste that is recognized as an environmental pollutant. The ever –
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Coal gangue, as a solid waste generated during coal mining and washing, is a black-gray rock with low carbon content, low calorific value, and hard texture. Coal gangue is
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