coal gangue is a solid

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coal gangue is a solid

Influence of coal gangue mulching with various thicknesses …

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 Sustainable Utilization of Coal Gangue in Geotechnical …

AbstractAmong coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of …

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Characteristics of Coal Gangue and Present Situation and …

Coal gangue is a kind of solid waste produced in the process of coal production and processing, which accounts for about 10–20% of coal output on average (Liangji et al. 2014), it is the solid waste with the largest output and land occupation in industrial production (Qi 2019).

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Effect of Coal Gangue Grading Characteristics on cemented …

The aggregate is composed of coal gangue sourced from Daizhuang Coal Mine, Shandong, China. Coal gangue is typically employed as a filling aggregate in coal mines, with a maximum particle size of 25 mm (1 in), frequently requiring preliminary crushing and screening via jaw crusher [14].The CPB for coal mines belongs to the …

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Industrial development and prospect about

Coal gangue as one of the largest industrial solid wastes in China brings about very serious environmental, social and economic problems. Comprehensive utilization of coal gangue is of importance to sustainable development of society and economy. China has made great progress in comprehensive utilization of coal gangue in the latest 40 years …

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Using Chinese Coal Gangue as an Ecological …

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 …

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Migration transformation, prevention, and control of typical …

Coal gangue is one of China's main industrial solid wastes, which contains various harmful heavy metal elements, such as lead (Pb). The long-term accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion, eventually endangering human life and health with its continuous …

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Characterization studies on coal gangue for sustainable …

The attained MDD of coal gangue is comparable to municipal solid waste incineration fly ash (MIFA) . The lower dry density and non- cohesive nature of coal gangue assists in easy operation and compaction using traditional equipment. Moreover, it offers as alternative for conventional materials used in the construction of lightweight …

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Study on the macro–micro evolution of compaction

Currently the main method of mine solid waste disposal and utilization is to apply gangue to underground filling. For the grading characteristics of coal gangue in the hollow zone in underground ...

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Low-temperature preparation of lightweight ceramic …

Coal-based solid wastes, including coal gangue and fly ash, are produced during coal mining and power generation. These solid wastes accumulate and settle, thereby forming solid waste mountains. Thus, a mass of limited land resources is wasted.

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Sustainability | Free Full-Text | Coal Mine Solid Waste Backfill …

Coal mine solid waste backfill is a coal mining method employed to safeguard subterranean and surface geological formations, as well as water resources, against impairment. It stands as a pivotal technical approach for realizing ecologically sustainable mining endeavors, aiming to address China's predicament of 'three down' …

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Separate recycling of iron and aluminum from iron-rich red mud by coal

Coal gangue is a rock formed by co deposition with coal during the coal formation process. It is a solid waste discharged during excavation, mining, and coal washing processes [12] . At present, China has accumulated over 50 billion tons of coal gangue, and an additional about 500 to 800 million tons of coal gangue will be …

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Activation Mechanism of Coal Gangue and Its Impact on the …

Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time. Using coal gangue in geopolymer preparation can effectively reduce cement output and meet the sustainability requirements. In this paper, the physical and chemical characteristics, including the heavy metal content, of …

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Environmental hazards and comprehensive utilization of solid waste coal

DOI: 10.1016/j.pnsc.2024.02.012 Corpus ID: 268401715; Environmental hazards and comprehensive utilization of solid waste coal gangue @article{Zheng2024EnvironmentalHA, title={Environmental hazards and comprehensive utilization of solid waste coal gangue}, author={Qinwen Zheng and Yi Zhou and Xin Liu …

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Separation and Recovery of Valuable Carbon

Coal gangue (CG), an industrial solid waste with high contents of Li and Ga, has attracted the attention of researchers. However, the utilization of CG remains an economic challenge. Pre-enrichment of Li and Ga by flotation was carried out with a view to improving the comprehensive utilization of CG. Mineral composition, time-of-flight …

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(PDF) Underground Disposal of Coal Gangue Backfill in …

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 ...

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Minerals | Free Full-Text | Preparation and Properties of

Coal gangue is the largest form of solid waste emitted during coal mining and coal washing, accounting for more than 20% of China's total industrial solid waste. Among the solid wastes in power plants, the emission of bottom ash is …

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Materials | Free Full-Text | Newly Generated Ca-Feldspar …

Coal gangue is a solid waste with low carbon content discharged during the course of the coal mining process. The resource utilization of coal gangue could solve environmental problems caused by its excessive production, such as soil contamination and land occupation. This study proposed to produce high-strength thermal insulation bricks …

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Comprehensive utilization and environmental risks of coal …

Coal gangue, a solid waste generated during coal mining and washing, accounts for approximately 10%–15% of the total coal production. The accumulative amount of coal gangue is largely increasing associated with coal mining activities, …

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Preparation of coal gangue ceramsite high-strength …

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 …

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Environmental hazards and comprehensive utilization of …

Abstract. Coal mining and washing is accompanied by the production of large amounts of coal gangue, which exerts a notable influence on the natural environment. …

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Using Chinese Coal Gangue as an Ecological Aggregate and …

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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Preparation of solid-waste-based pervious concrete for pavement…

Coal gangue (CG) is a solid waste discharged in coal mining and coal washing, resulting in approximately 8–20% of the total coal output in China [1]. It is the most accumulated industrial waste and occupies the most space [2].

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Preparation of coal gangue ceramsite high-strength …

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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Using Chinese Coal Gangue as an Ecological Aggregate and …

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Co-combustion and emission characteristics of coal gangue …

The reuse of coal gangue for energy recovery is developing rapidly in China, due to its advantage in achieving both economic and environmental benefits. Low-quality coal is often added to elevate the calorific value of the fuel. In this paper, the combustion characteristics as well as pollutant emissions (SO2 and NO) of coal …

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Identification and Activation of Coal Gangue and …

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 …

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Excess sulfur and Fe elements drive changes in soil and

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 after the …

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Representative coal gangue in China: Physical and chemical …

CG is a kind of shale solid waste associated with coal, which is generally presented as a black gray rock (Li et al., 2018a, ... CG1 is Hebei coal gangue, which …

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The Current Situation of Comprehensive Utilization of Coal Gangue …

Coal gangue is a kind of solid waste with a low calorific value produced in the process of coal mining and washing. According to statistics, by the end of 2019, China's accumulated amount of ...

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