1. Introduction. Coal gangue is a gray-black industrial and mineral residues with low carbon content and hard texture, which is produced in the process of coal mining and producing (Sheng et al., 2023).With the rapid development of coal mining industry, coal gangue annual output accounts for 10%–25% of the annual coal output (Gao et …
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 …
Abstract. Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase …
Coal is one of the main energy sources in many countries, and coal gangue (CG) is a kind of gray-black rock produced in the process of coal processing and washing, with low carbon content and harder than coal, generally accounting for 15%–20% of coal production in China and 25% of industrial waste emissions.
Coal gangue is produced during the coal mining process and the coal enrichment stage in coal processing plants [1]. In recent years, China has accounted for 50.8 % of the global coal production [2
The acid pollution produced from coal gangue piles is a global environmental problem. Terminal technologies, such as neutralization, precipitation, adsorption, ion exchange, membrane technology, biological treatment, and electrochemistry, have been developed for acid mine drainage (AMD) treatment. These …
coal gangue is generated by the production process, i.e., every ton of raw coal mined produces 150–250 kg of coal gangue. About 4 billion tons of coal gangue has been stored in China over time ...
Among the industrial solid wastes, coal gangue is one of the largest and most harmful wastes generated from the coal production process . Currently, coal gangue is loosely stockpiled at the mining sites and annual accumulative stockpiles of coal gangue in India are to an extent of 550 million tonnes . The disposal of such a large …
We developed a new calcination method to convert coal gangue (CG), a common waste generated from coal production process, into a modified form, which could be used as an adsorbent to remove Mn(2 ...
Coal gangue (CG) is an associated product in the process of coal mining and washing, accounting for approximately 10-15% of the raw coal production, and in some small and medium-sized coal mines ...
Coal gangue, as an associated product of coal mining, can cause a large number of piles to undergo slow oxidation and spontaneous combustion, resulting in the production of toxic and harmful gases, leading to casualties, environmental damage, and economic losses. Gel has been extensively employed as a fire-retardant material …
The separation of fine coal has become a severe challenge for the coal industry. 5,6 Froth flotation is widely used for processing fine coal, utilizing the difference between the surface hydrophobicities of particles to separate coal from gangue. 7−9 In the flotation process, hydrophobic particles are expected to attach to the bubble surface ...
Starting from the resource characteristics of coal gangue, this paper systematically discusses the ways and research status of coal gangue resource utilization, mainly including: extracting and recovering …
The influence of coal gangue on the durability of coal gangue concrete is remarkable, resulting from the porous structure of coal gangue that provides more …
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 …
The consumption and production of coal in China is the largest in the world, accounting for approximately 50 % and 47 %, respectively [1]. Coal gangue (CG) is a type of low-carbon containing solid waste generated during coal mining activities, and accounts for approximately 10–15 % of coal production in total.
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 .
China is rich in coal resources, which account for more than 70% of its energy production and consumption. Meanwhile, a large amount of coal gangue is generated by the production process, i.e., every ton of raw coal mined produces 150–250 kg of coal gangue. About 4 billion tons of coal gangue has been stored in China over time [1,2].
Coal mining and washing is accompanied by the production of large amounts of coal gangue, which exerts a notable influence on the natural environment. …
Large amounts of by-products, including coal gangue, circulating fluidized bed (CFB) slag, and coal fly ash (CFA), are generated during mining, washing and burning of high alumina coal (HAC). The stockpile of these by-products of HAC will cause the pollution of air, water and soil. Meanwhile, the unbalanced regional distribution of …
Utilization of high-filler coal gangue (CG) to produce cost-effective composites is a promising strategy. To clarify the impact of high-filled CG on composite preparation and performance, in this research, the composite was prepared from CG and polyethylene (PE) through physical mixing and then hot-pressing.
The research on using microwave-activated coal gangue to produce LC 3 not only reduces the carbon emissions and costs of cement production but also addresses the environmental pollution caused by coal gangue. ... the next phase will entail scaling up the production process and evaluating the feasibility of industrial application. This phase ...
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 …
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 coal gangue has been reached 4.5 billion metric tons.
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 …
It solves the problems of weak spheroidization of iron tailings and difficult expansion of coal gangue. CGC production process: 1 Coal gangue is crushed by a jaw crusher and ground by a ball mill. Raw materials are screened using a 100-mesh vibrating screen. 2 Mix raw materials (55% coal gangue and 45% iron tailings) to make particles …
To address the issues of complex algorithm models, poor accuracy, and low real-time performance in the coal industry's coal gangue sorting, a lightweight real-time detection method called YOLOv8s-GSC is proposed based on the characteristics of coal gangue. This method incorporates the ghost module into the YOLOv8s backbone …
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 …
Coal gangue is a solid waste formed during coal production, and the acid mine drainage it generates during open-pit storage severely pollutes the ecological environment of mining areas.
Coal gangue is a solid waste formed during coal production, and the acid mine drainage it generates during open-pit storage severely pollutes the ecological environment of mining areas. Microorganisms play a crucial catalytic role in acidification, and their species and gene functions change during the oxidation process of coal …
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 …
Traditional Coal Gangue Separation Process and Equipment. Water washing and dry coal preparation are the main parts of coal preparation. Spiral separation, jigging, heavy medium separation, and other processes are water washing processes, which have the advantages of mature technology, high separation accuracy, and large …
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 …