During coal mining and washing, about 10–15% of the total coal production is discarded in the form of coal gangue; meanwhile, a certain amount of coal slime with low heat value is also generated. In recent decades, more and more researches focus on the generation of commercial heat and electricity by burning coal gangue and coal slime with circu-
This gap in knowledge highlights the need for comprehensive studies to optimize the activation process of coal gangue, ... Addressing these research gaps is crucial for advancing the use of coal gangue in LC 3 production and promoting the ... The research on using microwave-activated coal gangue to produce LC 3 not only reduces …
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].
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 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 gangue.
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 …
Abstract. Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase …
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 …
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 ...
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 …
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 …
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 …
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 .
Coal gangue (CG) is the by-product during the coal excavation, mining and washing process. The average production of CG is approximately 10–15% of raw coal production in China [[2], [3], [4]].According to the statistics of the National Development and Reform Commission (NDRC) of China in 2014, the total accumulative stockpiles of …
1. Introduction. Coal gangue (CG) is an industrial solid waste produced in the process of coal production. The global coal industry produces about 350 million tons of inactive coal gangue every year. 1.75 billion tons of coal gangue waste has been accumulated in landfills for decades in Europe [1, 2].At present, China's coal gangue has exceeded 7 …
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.
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 …
Coal is a significant source of energy and industrial raw materials. Among the fossil energy values, it has the most varieties and the longest history of development and use [].However, a large amount of coal gangue is produced in the process of coal production and washing.
Significant synergistic effects exist in the co-combustion heat release process of coal and coal gangue. ... the main solid waste in coal mining (accounting for about 10%–15 % of the total coal production) ... and new free radicals will be constantly produced from coal-oxygen reactions. At the initial heating-up stage, active structures in ...
The production of coal gangue sintered bricks is an effective approach for realizing the resource utilization of coal gangue, which can also reduce damage to cultivated land due to the production ...
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
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 …
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 …
Although the energy utilization process of coal gangue produces direct carbon emissions, its energy value can be fully reflected. Carbon capture technology, …
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 …
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.
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 …
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 …
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 …
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 ...
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 …
Coal gangue (CG) is currently one of the largest source of annual emissions and accumulation of industrial waste in China; in the coal production process, gangue …
Coal gangue, which is the main source of citrate-soluble silicon fertilizer, is a solid waste produced in the process of coal processing and utilization. Due to the accumulation of a large amount of coal gangue and the failure to fully utilize or dispose it, it caused problems on the environment
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 …
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 metallic iron in this process is produced by the reduction of iron oxide below the fusion temperature of iron ore (1535 deg C) by utilizing carbonaceous material present in the non-coking coal. ... no other chemical change takes place during the direct reduction process. The gangue material in DRI, originating from the iron ore, namely ...
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 ...