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 …
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Coal gangue, produced during coal mining and processing [1, 2], is one of the most extensively produced solid wastes in China [1, 3], accounting for approximately …
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3.1 Mineralogical Composition of Coal Gangue. The chemical composition of coal gangue sample by XRF analysis was shown in Table 1.The results show that the main chemical elements in the samples are silicon and aluminum, and the total amount of other elements is less than 1.5%.
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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 …
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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 ...
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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.
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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 ...
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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.
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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 ...
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Investigation into trace element partitioning behavior from a coal gangue-fired power plant in Shanxi province, China, has been conducted and showed that Hg, As, Be, and Cd were highly volatile elements in the combustion of coalgangue, which were notably enriched in fly ash and may be emitted into the environment via the gas phase.
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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
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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 …
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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
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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 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 ...
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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.
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Abstract. Coal gangue, a by-product produced during the coal processing, has a serious impact on the environment. Using coal gangue as a fertilizer has been proven helpful in …
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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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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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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 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 …
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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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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 …
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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-
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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 ...
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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 …
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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 …
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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 …
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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 …
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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 …
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