Environmental effects of coal gangue and its utilization
Coal gangue is an industrial residue that is discharged in the course of coal exploitation, processing, and electricity generation.
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Coal gangue is an industrial residue that is discharged in the course of coal exploitation, processing, and electricity generation.
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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 …
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During the extraction and processing of coal, a large amount of solid waste, collectively known as gangue, is produced. This gangue has a low carbon content but a high ash content, accounting for approximately 15 to 20% of the total coal yield. Before coal is used, coal and gangue must be effectively separated to reduce the gangue …
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Abstract Coal gangue was the rock associated with coal mining. The combustion efficiency of coal gangue in thermal power plants was limited by its low calorific value and incombustibility. In this paper, coal gangue was made into particles of about 2–10 mm, and its isothermal pyrolysis characteristics under the N2 atmosphere …
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Coal gangue occupies large swathes of land resources, resulting in ecological fragility and various environmental problems. Despite coal gangue having …
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1. Introduction. Coal gangue is one of the largest industrial residues in China that is discharged during the processing and utilization of coal (Gu, 1997, Liu and Liu, 2010).With continuous growth of coal mining and coal cleaning, a large amount of coal gangue are produced, which contain sulfide minerals, alumino-silicates minerals, other …
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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, 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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Coal gangue is one of the largest mine solid wastes in China, and its discharge and stockpiling have caused resource waste, environmental pollution and other problems. Starting from the resource …
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The calorific value of coal gangue refers to the amount of energy that can be released from complete combustion of coal gangue per unit mass under certain conditions, and it usually increases with increasing carbon mass fraction and volatile fraction and decreases with increasing ash fraction [24].The meltability of coal gangue refers to the …
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Recognizing and distinguishing coal and gangue are essential in engineering, such as in coal-fired power plants. This paper employed a convolutional neural network (CNN) to recognize coal and gangue images and help segregate coal and gangue. A typical workflow for CNN image recognition is presented as well as a strategy …
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Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue …
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1. Introduction. Coal gangue is a solid waste discharged during coal mining and washing, and many accumulated coal gangue has caused severe damage to the environment and ecology [1].After a long time of accumulation, the structure of gangue mountain becomes loose, which can easily cause natural disasters such as mudslides …
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Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process. Coal …
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Coal gangue is a mine waste generated during the mineral processing phase of coal production. With the surge in demand for coal in thermal power, steel and cement generation industries, the rate of coal gangue generation has reached unprecedented heights. With the realisation of potential threat posed by coal gangue, …
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Coal gangue is an industrial solid waste inevitably produced in coal mining and coal washing, and its emissions account for approximately 10%–15% of coal production (Zhou et al. 2014a, b).China is the country with the highest coal production in the world, and a large amount of coal gangue waste is piled on the surface at mining …
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1. Introduction. Coal gangue is a solid waste produced during coal mining and washing, and it is responsible for the majority of global emissions in the world [].Long-term coal gangue storage not only takes up space, pollutes the environment, and degrades water quality, soil, and atmosphere but also endangers public safety and has a great …
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This article summarizes the research progress of coal gangue, a solid waste produced during coal mining, under the carbon neutralization strategy. It focuses …
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1. Introduction. As a significant energy source in the world, coal accounting for more than 27% of the primary energy structure [1], [2], and is widely employed in daily production and life.Gangue is a low-carbon solid waste produced during coal mining and washing, accounting for about 10%−15% of the total coal output [3].The cumulative …
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This study was conducted at the Suntuan coal mine in the Huaibei mining area, located at 33°33′49.5072″ N and 116°46′3.3852″ E. The coal gangue used in this study was obtained from the Suntuan coal mine and crushed to a size less than 5 mm, with particles below 2 mm, accounting for approximately 70%.
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Along with the excavation and washing of coal in the production process, large amounts of rock-like coal gangue (CG) accompanying the carboniferous beds are discharged as industrial residues, accounting for around 10–20% of the coal production [2,3,4].In the largest coal production country, namely China, more than 700 million tons …
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1. Introduction. Coal is an important energy material [1] and chemical raw material [2, 3] for human beings, which makes it mined in large quantities every year.In the process of coal mining, coal gangue is inevitably mixed into raw coal, accounting for more than 10% [4].The vast majority of solid waste in China comes from coal mining [5].The …
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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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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 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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In this paper, the physical, chemical and pollution characteristics of coal gangue are summarized, and the ecological restoration mode is divided into two modes: …
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For coal and gangue, intelligent sorting processes for separation, the use of coal and gangue mineral components with different fundamental differences, and the study of different properties of minerals and coal with different scales and density regarding the gray value change law are presented. The results show that the gray value of single …
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Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China. The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters, but also pollutes the surrounding ecological environment, which in turn affects human …
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