Distribution of coal gangue

Comprehensive utilization and environmental risks of coal gangue: A

2019年12月1日  Coal gangue, a solid waste generated during coal mining and washing, accounts for approximately 10%–15% of the total coal production The accumulative amount 2024年6月4日  According to the statistical data of the new output of coal gangue in the major coalproducing provinces in 2018, the new output of coal gangue in the nine major coal Characteristics of Coal Gangue and Present Situation and 2024年9月7日  As the world’s largest coal producer, China produced nearly half of coal gangue The amount of accumulated coal gangue in China has exceeded 7 billion tons as of 2022 Opportunities, challenges and modification methods of coal gangue 2018年9月18日  In this work, we gathered the coal gangue at different weathering degree, including red gangue (RG), brown gangue (BG), gray gangue (GG), light black gangue (LB), Assessment of heavy metal in coal gangue: distribution,

The Sustainable Utilization of Coal Gangue in Geotechnical

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 2021年5月1日  In this paper, the physical, chemical and pollution characteristics of coal gangue are summarized, and the ecological restoration mode is divided into two modes: traditional Review of Coal Gangue Characteristics and Ecological 2024年4月1日  Coal gangue, a predominant form of solid waste generated during coal mining and processing, often constitutes 15–20 % of the total output of raw coal [8] Due to its poor Environmental hazards and comprehensive utilization of solid waste coal 2024年2月28日  In this paper, through laboratory tests and numerical simulations, the bearing characteristics and deformation damage of gangue are deeply investigated and analyzed from Study on the macro–micro evolution of compaction Nature

Exploring calcined coal gangue fines as the total substitute

2022年12月1日  Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China It is estimated that the production of 1 t coal generates 01–025 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3]The coal gangue not only occupies agricultural land in large areas but triggers 2024年9月7日  The persistent reliance on coal has resulted in the accumulation of substantial coal gangue, a globally recognized problematic solid waste with environmental risks Given the coal gangue properties and global land degradation severity, the resourceful utilization of coal gangue as soil conditioners is believed to be a universally applicable, costeffective, high Opportunities, challenges and modification methods of coal gangue 2017年7月9日  The experimental results indicate that the RosinRammler distribution could accurately describe the particle size distribution of broken coal and gangue under different impact velocities, and there is a minimum overlap region when the impact velocity is 1210 m/s which leads to the minimum mixed degree of coal and gangue, and consequently the Particle size distribution of coal and gangue after impact 2024年2月28日  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 Study on the macro–micro evolution of compaction Nature

Research and engineering practice on space characteristics of gangue

2023年12月12日  The issue of gangue emissions accompanying coal production is one of the key factors currently hindering the green and efficient development of the coal industry 1,2According to statistics, the 2024年9月20日  The accumulation of coal gangue poses significant environmental challenges due to its massive volume and low reactivity This study investigates the influence of calcium hydroxide (Ca(OH)₂) and gypsum on the mechanical properties, hydration, and pore structure of lowcarbon cementitious materials incorporating high volumes of calcined coal gangue (CCG) Improvement of strength and microstructure of lowcarbon 2024年11月7日  The temperature field distribution of coal gangue dump at the same depth under different HPs insertion spacing is similar, but the temperature values are different Fig 11Influence of heat pipe layout parameters on the cooling 2022年2月21日  Sampling Coal gangue has been one of the largest industrial solid wastes in China Based on the occurrence and regional distribution of coal resources in China and the coal basins containing coal gangue, the production sites of coal gangue in China can be divided into five main regions: Northeast China, North China, South China, Southwest China, and Study on the distribution characteristics and ecological risk

Experimental investigation of temperature distribution and

2021年3月2日  The temperature distribution in the coal gangue pile shows the horizontal and vertical heat transfer processes The change of internal temperature distribution can be monitored by arranging temperature detection points in the gangue pile When the height of coal gangue piles is 12 m, the internal heat is mainly concentrated in the range of 06 2023年12月15日  The particle size distribution of coal gangue is presented in Table 1 The proportion of each particle size grade decreases as the particle size becomes finer, with larger proportions observed for coarser components and smaller proportions for finer components This phenomenon can be attributed to the fact that the samples used in the sieving The influence of carbon imperfections on the 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 characteristics of coal gangue, this paper Research Progress on Comprehensive Utilization 2024年8月12日  The coal gangue dump may introduce heavy metal(oid)s (HMs) into surrounding agricultural soils, posing potential health risks to nearby communities The distribution range of PLI values was Assessment of heavy metal(oid) pollution and

Particle size distribution of coal and gangue after impact

2017年8月28日  Particle size distribution of coal and gangue after impactcrush separation YANG Daolong(杨道龙) 1, LI Jianping(李建平) , DU Changlong(杜长龙)1, ZHENG Kehong(郑克洪)2, LIU Songyong(刘送永)1 1 School of Mechatronic Engineering, China University of Mining Technology, Xuzhou , China; 2 College of Mines and Earth The particle size distribution of coal gangue can be compared using three different grading methods The findings illustrate that the yield stress and viscosity of CPB are lower under intermittent and Continuous grade than when using a single grade method, which supports previous research However, in gap grade, both the yield stress and Effect of coal gangue grading characteristics on cemented 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] Coal gangue can Environmental hazards and comprehensive utilization of solid waste coal 2024年2月2日  Particle distribution of coal gangue, (a) Xishan, (b) Lvliang, (c) Changzhi, (d) Xiqu 313 XRD From Fig 3, it can be observed that after calcination at 800 ℃, the diffraction peaks of kaolinite in the 0–1 mm coal gangue from the four regions decreased or even disappearedStudy on the calorific value and cementitious properties of coal gangue

Spatial distribution characteristics and risk assessment of soil

2023年3月18日  The pollution of heavy metals in soil caused by exposed coal gangue and its prevention and control has become a hot issue restricting the green mining of coal in China Nemerow integrated pollution index (NIPI), potential ecological risk index (RI) and human health risk assessment model were used to evaluate the pollution and risk of heavy metals (Cu, Cr, 2019年10月1日  The element Se has an uneven distribution and concentration in Chinese coal gangue from different geological periods from different areas: (1) coal gangue of the Paleozoic period has higher levels of Se, with arithmetic means of 425 mg/kg (C 1), 415 mg/kg (C 2P 1) and 395 mg/kg (P 2), while the coal gangue of the Paleogene and Neogene Selenium in Chinese coal gangue: Distribution, availability, 2023年3月30日  Coal gangue is a byproduct of coal, the output of which is as high as 30% of raw coal, whereas only 30% of it is recycled The leftover remains in the environment from gangue backfilling areas and overlap with residential, agricultural, and industrial areas Coal gangue accumulated in the environment is easily weathered and oxidized and becomes a source of Distribution pattern of polycyclic aromatic compounds in coal gangue 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

Distribution of polycyclic aromatic hydrocarbons（PAHs）in coal gangue

2018年12月10日  The temperature distribution in a coal gangue fracture under 12 conditions (with or without the obstacle, and various heat flows) is simulated via Fluent numerical simulation The results show 2018年9月18日  The results indicated that the weathering degree had a significant impact on the content of heavy metal, and exchangeable and carbonate fractions of Cr and Pb were a large proportion of the total and should attract great attention In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the Assessment of heavy metal in coal gangue: distribution, 2024年3月6日  Therefore, in this study, the REYrich coal gangue in Jinsha County of Guizhou Province, SW China, was used as a research object Based on the study of the occurrence and distribution characteristics of REY in coal gangue, the process of selectively grinding coarsegrained tailing preenrichment and roasting–leaching of coal gangue was exploredCharacterization and acid leaching of rare earth elements in coal 2023年9月21日  Figure 7 shows the particle size distribution of coal gangue powder When grinding duration of 5 min, there is a wide and relatively flat peak in the distribution curve of particle size range of 3~10 μm The peak value of the curve continuously shifted forward, increased, and narrowed as the grinding duration increased, indicating an increase Study on the Reactivity Activation of Coal Gangue for

Particle size distribution of coal and gangue after

2017年6月1日  The experimental results indicate that the RosinRammler distribution could accurately describe the particle size distribution of broken coal and gangue under different impact velocities, and 2024年2月1日  The accumulation of coal gangue (CG) from coal mining is an important source of heavy metals (HMs) in soil Its spatial distribution and environment risk assessment are extremely important for the management and remediation of HMs Eighty soil samples were collected from the highsulfur CG site in northern China and analyzed for six prehensive study on the spatial distribution of heavy 2023年10月11日  The coal fly ash concentration has a positive relationship with the acceleration factor The permeability of crushed coal gangue follows a hierarchical distribution law and the permeability changes in the magnitude range of 10–11 ~ 10–9 m2 The fractal dimension is inversely related to the permeability of crushed coal gangueStudy on mechanical properties of coal gangue and fly ash 2024年5月11日  The presence of pyrite poses a significant impediment to the comprehensive utilization of coal gangue, which is a prevalent solid waste in industrial production However, the current efficacy of jig separation for pyrite in finegrade coal gangue remains unsatisfactory To investigate the influence of particle size distribution on the jig separation of pyrite in finegrade Study on the Influence of Particle Size Distribution on the

Study on the spatial distribution regularities of coal gangue

2015年1月1日  Mines in northern Germany are mostly openpit mining, which causes many coal gangue hills German people treat the gangue hills as reclamation object so that they can be developed into woodland DOI: 101016/JRESCONREC201905039 Corpus ID: ; Selenium in Chinese coal gangue: Distribution, availability, and recommendations @article{Long2019SeleniumIC, title={Selenium in Chinese coal gangue: Distribution, availability, and recommendations}, author={Jie Long and Shixi Zhang and Kunli Luo}, journal={Resources, Conservation and Selenium in Chinese coal gangue: Distribution, availability, 2022年12月1日  Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China It is estimated that the production of 1 t coal generates 01–025 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3]The coal gangue not only occupies agricultural land in large areas but triggers Exploring calcined coal gangue fines as the total substitute 2024年9月7日  The persistent reliance on coal has resulted in the accumulation of substantial coal gangue, a globally recognized problematic solid waste with environmental risks Given the coal gangue properties and global land degradation severity, the resourceful utilization of coal gangue as soil conditioners is believed to be a universally applicable, costeffective, high Opportunities, challenges and modification methods of coal gangue

Particle size distribution of coal and gangue after impact

2017年7月9日  The experimental results indicate that the RosinRammler distribution could accurately describe the particle size distribution of broken coal and gangue under different impact velocities, and there is a minimum overlap region when the impact velocity is 1210 m/s which leads to the minimum mixed degree of coal and gangue, and consequently the 2024年2月28日  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 Study on the macro–micro evolution of compaction Nature2023年12月12日  The issue of gangue emissions accompanying coal production is one of the key factors currently hindering the green and efficient development of the coal industry 1,2According to statistics, the Research and engineering practice on space characteristics of gangue 2024年9月20日  The accumulation of coal gangue poses significant environmental challenges due to its massive volume and low reactivity This study investigates the influence of calcium hydroxide (Ca(OH)₂) and gypsum on the mechanical properties, hydration, and pore structure of lowcarbon cementitious materials incorporating high volumes of calcined coal gangue (CCG) Improvement of strength and microstructure of lowcarbon

Influence of heat pipe layout parameters on the cooling

2024年11月7日  The temperature field distribution of coal gangue dump at the same depth under different HPs insertion spacing is similar, but the temperature values are different Fig 112022年2月21日  Sampling Coal gangue has been one of the largest industrial solid wastes in China Based on the occurrence and regional distribution of coal resources in China and the coal basins containing coal gangue, the production sites of coal gangue in China can be divided into five main regions: Northeast China, North China, South China, Southwest China, and Study on the distribution characteristics and ecological risk 2021年3月2日  The temperature distribution in the coal gangue pile shows the horizontal and vertical heat transfer processes The change of internal temperature distribution can be monitored by arranging temperature detection points in the gangue pile When the height of coal gangue piles is 12 m, the internal heat is mainly concentrated in the range of 06 Experimental investigation of temperature distribution and 2023年12月15日  The particle size distribution of coal gangue is presented in Table 1 The proportion of each particle size grade decreases as the particle size becomes finer, with larger proportions observed for coarser components and smaller proportions for finer components This phenomenon can be attributed to the fact that the samples used in the sieving The influence of carbon imperfections on the

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