Coal gangue processing standards

Comprehensive utilization and environmental risks of coal gangue:

2019年12月1日  In response to the problems in the utilization of coal gangue, following suggestions were proposed: (1) scientific utilization of coal gangue; (2) specific standards 2024年9月7日  In practical applications and subsequent research endeavors, an appropriate modification method should be selected to obtain modified coal gangue with matching Opportunities, challenges and modification methods of coal 2024年6月4日  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 Characteristics of Coal Gangue and Present Situation and Prospect 2023年5月25日  Against the background of the carbon neutralization strategy, the treatment and utilization of coal gangue should focus on three aspects: its own carbonfree emissions; its carbon absorption effect and lowcarbon Lowcarbon utilization of coal gangue under the

Comprehensive utilization and environmental risks of coal gangue:

2019年12月1日  The amount of coal gangue, a byproduct of coal mining and washing, is rapidly increasing with the growing trend of energy consumption The accumulated coal gangue 2022年4月6日  Among coal miningrelated wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining A The Sustainable Utilization of Coal Gangue in Geotechnical and 2019年12月1日  Aiming at the problems of the large storage, complex composition, low comprehensive utilization rate, and high environmental impact of coal gangue, this paper Comprehensive utilization and environmental risks of coal gangue: 2022年11月25日  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 Underground Disposal of Coal Gangue Backfill in China

Synergistic Utilization of Basic Oxygen Furnace Slag and Coal Gangue

2024年10月25日  Steel slag from steel mills and coal gangue discarded during coal mining are both reusable solid wastes with significant emissions [1,2] In 2021, the production of steel slag exceeded 120 million tons in China []In contrast, while developed countries have attained a comprehensive utilization rate of over 90 pct for steel slag, China’s comprehensive utilization 2024年9月7日  However, a substantial amount of coal gangue was generated and discharged during the coal mining, washing and processing processes Coal gangue, a blackgray rock with lower carbon content and heat value compared to coal, accounts for about 15%20% of coal production (Li et al 2006)The production of coal gangue was conservatively estimated based Opportunities, challenges and modification methods of coal gangue This, mixed with the 60 million tons of coal mud also produced, could be used for power generation; and the coal mining gangue could be combined with coal fly ash to produce building materials The estimated cost of such projects would be up to 4 billion yuan , but would be expected to save just over 4 million tons of standard coal per yearGangue WikipediaCoal 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 characteristics of coal gangue, this paper systematically discusses the ways and research status of coal gangue resource utilization, mainly including: extracting and recovering Research Progress on Comprehensive Utilization of Coal Gangue

Underground Disposal of Coal Gangue Backfill in China MDPI

2022年11月25日  China’s total coal production in 2021 exceeded 413 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 existing gangue backfilling 2024年4月1日  Coal gangue power generation is presently the primary method of comprehensively utilizing coal gangue to achieve economic profits [157] Coal gangue is composed of carbon and other flammable substances, which can produce heat when burned This heat can be utilized for the purposes of power generation and heating [158]Environmental hazards and comprehensive utilization of solid waste coal 2023年12月8日  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 content in the raw coal and Coal and Gangue Classification Based on LaserInduced 2024年10月29日  Coal gangue identification is the primary step in coal flow initial screening, which mainly faces problems such as low identification efficiency, complex algorithms, and high hardware requirements In response to the above, this article proposes a new “hardware friendly” coal gangue image recognition algorithm, RRBMYOLO, which is combined with dark light RRBMYOLO: Research on Efficient and Lightweight Convolutional

Comprehensive utilization and environmental risks of coal gangue

2019年12月1日  This study aims to provide a highvalue and environmentally friendly method for the application of coalbased solid waste Modified fly ash/polyurethane (MFA/PU) and modified coal gangue powder 2024年3月13日  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 Preenrichment of Li and Ga by flotation was carried out with a view to improving the comprehensive utilization of CG Mineral composition, timeofflight secondary ion mass Separation and Recovery of Valuable Carbon ACS Publications2024年4月15日  Coal gangue is a byproduct of coal mining and processing, and according to incomplete statistics, China has amassed a substantial coal gangue stockpile exceeding 2600 large mountains, which poses a serious threat to the Enhancing Fatigue Performance of Coal Gangue 2019年12月1日  The utilization amount of coal gangue was 480 million tons in 2013, accounting for 64% of the total output, of which approximately 150 million tons of coal gangue were used for power generation (32%), 56 million tons for the production of building materials (12%), and 260 million tons for land reclamation (56%) (National Development and Reform Commission, 2014)Comprehensive utilization and environmental risks of coal gangue: A

Carbon Footprint Analysis of Coal Gangue in Geotechnical

2019年9月28日  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, researchers have made attempts to below the corresponding standards Keywords Coal gangue Brick Sintering temperature Microstructure Physicomechanical properties Introduction Coal gangue is a solid refuse discharged from coal mining and processing In China, the annual production of coal gangue is about 315 million tons for underground coalUtilization of coal gangue for the production of brick SpringerThe 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 highvalueadded utilization, and outstanding environmental impact Hence, the prospect of resource utilization of coal gangue is broad The existing disposal capacity and scale of coal gangue obviously Research progress of highvalue utilization of coal gangue 2024年11月4日  This study comprehensively investigated the extraction of rare earth elements (REEs) from coal gangue using various analytical techniques The results showed a significant enhancement in REE extraction efficiency, particularly for light rare earth elements, after roasting at 600 °C, while also elucidating the mechanism of roasting activation The study also Efficient Leaching of Rare Earth Elements from Coal Gangue: A

Synergistic performance of microwaveactivated coal gangue with

2024年11月1日  Coal gangue: The coal gangue (CG) used in this study is untreated raw coal The sand used is standard sand produced by Xiamen Aceo Standard Sand and detailed in Table 11, it was found that the processing stage consistently had the highest proportion and value of carbon emissions throughout the life cycle of both OPC and 2024年9月1日  As a byproduct of coal production, coal gangue, if not handled properly, will pose an important hidden danger to the environment and safety Using underground intelligent coal gangue sorting technology can increase efficiency, protect the environment, and enhance safety, which is essential for achieving efficient and ecofriendly coal productionResearch and prospect of underground intelligent coal gangue 2017年12月20日  1 Introduction Coal gangue is a significant residue during the processing of coal mining and coal washing, which accounts for approximately 10–15% of raw coal production and becomes one of the largest industrial residues in China []The rapid growth of the mining industry in China over the last decades has resulted in large amounts of coal gangue piled in Trace Elements in Coal Gangue: A Review IntechOpen2024年7月12日  Coal gangue (CG), which accounts for about 10–20 % of coal output, is a kind of solid waste generated during the coal mining and washing processes According to Fig 2 , the annual output of CG in China fluctuates between 600–800 million tons, with a utilization rate hovering around 70 %Review Highcapacity utilization of coal gangue as supplementary

Characteristics of Coal Gangue and Present Situation and

2024年6月4日  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 regulations, standards, and statistical systems have been gradually improved, 2024年2月15日  To address the lightweight and realtime issues of coal sorting detection, an intelligent detection method for coal and gangue, Ourv8, was proposed based on improved YOLOv8 Images of coal and gangue with Detection of Coal and Gangue Based on Improved 2024年6月28日  Coal gangue (CG) is a major solid waste generated during coal mining and processing [3,4] Currently, it is estimated that around 750 million tons of CG are generated annually, resulting in the formation of more than nineteen Feasibility Analysis of BacterialTreated Coal Gangue 2016年6月8日  Coal gangue, an industrial solid waste discarded from coal mining and processing, was used as the sole raw material to prepare brick The coal gangue was crushed, homogenized, milled and then pressed into green compacts The dried compacts were sintered at different temperatures for 2 h The obtained brick samples were characterized with Xray Utilization of coal gangue for the production of brick

and Recovery of Critical Elements from Coal Gangue ResearchGate

Coal Gangue Minerals 2022, 12, 1371 Although coal gangue is a coal mining and processing byproduct, Chinese Standard GB/T 194941–2004 was chosen as the sampling method2023年11月11日  Coal gangue image recognition is a critical technology for achieving automatic separation in coal processing, characterized by its rapid, environmentally friendly, and energysaving natureResearch on Recognition of Coal and Gangue Based on Laser 2023年12月15日  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 508 % of the global coal production [2]The accumulated stockpile of coal gangue in China has reached 7 billion tons, with an annual growth rate of 150 million tonsThe influence of carbon imperfections on the physicochemical 2015年2月18日  The reuse of coal gangue for energy recovery is developing rapidly in China, due to its advantage in achieving both economic and environmental benefits Lowquality 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 gangue, lowquality coal and their blends Cocombustion and emission characteristics of coal gangue and

Sustainable and clean utilization of coal gangue: activation and

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 in the air pollution and water pollution, and triggered some geological disasters such as landslides and coal gangue debris ows [12] Fortunately, coal gangue is a type of2021年9月8日  Xiangang et al proposed a coal gangue recognition method driven by deep learning that is based on the differences in the surface characteristics of coal gangue; they also studied the coal gangue location method based on binocular stereo vision, which effectively improves the accuracy of coal gangue identification and location Coal gangue detection and recognition algorithm based on A modified YOLOv4 model, named GYOLO, for coal gangue recognition is proposed with the aim of reducing model parameters, improving calculation speed, and reducing equipment requirements This paper proposes a modified YOLOv4 model, named GYOLO, for coal gangue recognition with the aim of reducing model parameters, improving calculation speed, and A fast recognition method for coal gangue image processing2024年2月23日  To address the issues of complex algorithm models, poor accuracy, and low realtime performance in the coal industry's coal gangue sorting, a lightweight realtime detection method called YOLOv8sGSC is proposed based on the characteristics of coal gangue This method incorporates the ghost module into the YOLOv8s backbone network to reduce the The realtime detection method for coal gangue based on

Determination of heavy metals concentrations in coal and coal gangue

2022年5月5日  During mining, processing and utilization of coal, the environment is exposed to piles of coal, coal gangue and coal ash, which have human health concerns Coal and coal gangue samples were obtained from a coal mining company located in Southern Province, Sinazongwe District, Zambia The main objective of this research was to determine the level of Currently, coal gangue detection methods include traditional techniques and image processingbased methods Traditional methods encompass techniques such as radioactive detection [2] and density identification Radioactive detection identifies coal and gangue by measuring the difference in their absorption of radiation, requiring a high execution speedIntelligent detection of coal gangue in mining Operations using 2023年8月31日  Coal gangue is a waste byproduct generated during coal mining and processing It is harder than coal, has a lower carbon content, and its main components are SiO 2 and Al 2 O 3 Coal gangue has become a significant industrial solid waste because it pollutes the environment and is prone to spontaneous combustionHow to Recycle and Process Coal Gangue: 7 Effective Ways2024年7月1日  Geopolymers, as a novel cementitious material, exhibit typical brittle failure characteristics under stress To mitigate this brittleness, fibers can be incorporated to enhance toughness This study investigates the effects of varying polypropylene fiber (PPF) content and fiber length on the flowability, mechanical properties, and flexural toughness of coal gangue Properties of FiberReinforced Geopolymer Mortar Using Coal Gangue

Investigating the compaction and the mechanical behaviors of coal

2024年11月1日  Using coal gangue as subgrade filler (CGSF) can address the accumulated issues of coal mine waste, but also save the constructing costs, which has the important ecological and engineering 2023年12月1日  The accumulation of coal gangue not only occupies a vast amount of land but also poses a serious threat to the ecological environment [19, 20] However, coal gangue contains abundant aluminosilicate components, such as Al 2 O 3 and SiO 2, which have the potential to be used as raw materials for alkaliactivated cementitious materials [[21], [22 Alkaliactivated geopolymer materials prepared from coal gangue 2024年3月6日  Coassociated rare earth elements (lanthanide and yttrium, REY) in coal and its byproducts have been considered important potential nontraditional rare earth sources In this study, a coal gangue sample collected from a coal processing plant in Jinsha County of Guizhou Province, southwest China, was used as the research objectCharacterization and acid leaching of rare earth elements in coal 2021年5月11日  The modernday coal processing plants can be categorized into four different circuits, depending upon the size of the coal particles to be treated: (a) coarse coal processing circuit treating particles coarser than 10 mm, (b) small coal circuit for washing particles in the size range of 110 mm, (c) fine coal circuit for cleaning particles in size range of 015–1 mm, and Mineral Beneficiation and Processing of Coal SpringerLink

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