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Distribution of carbon in coal gangue Distribution of carbon in coal gangue Distribution of carbon in coal gangue
Properties and Organic Carbon Distribution of Weathered Coal
Taking coal gangue mountain of Panyi coal mine in Huainan mining area as the study object, through the analysis of physicochemical properties, scanning electron microscope(SEM), 2024年2月1日 Based on the source and distribution of coal gangue (CG) in China, this study introduces the current situation of CG storage in China and the problems existing in the Representative coal gangue in China: Physical and chemical 2024年3月13日 A Bi liquid metal ion source was used to examine the surface composition distribution of coal gangue through a TimeofFlight Secondary Ion Mass Spectrometer (TOFSIMS, ION TOFSIMS 5, USA)Separation and Recovery of Valuable Carbon ACS 2019年9月28日 In the present study, an attempt has been made to perform carbon footprint analysis on coal gangue to assess the CO 2 emissions in utilising it as an embankment Carbon Footprint Analysis of Coal Gangue in Geotechnical
Characteristics of Coal Gangue and Present Situation and Prospect
2024年6月4日 The harmless disposal and comprehensive utilization of coal gangue under “the Carbon Peak and Carbon Neutralization Target” is an effective way to develop circular 2023年12月15日 The carbon content and carbon distribution significantly affect the macroscopic physicochemical properties of coal gangue aggregates Carbon, as a defect, is uniformly The influence of carbon imperfections on the physicochemical To grasp the concept of the carbon effect of coal gangue more comprehensively and systematically and provide more economic and reasonable technical strategies for the Lowcarbon utilization of coal gangue under the carbon 2019年5月1日 In this paper, we obtained the thermal infrared spectrum of coal gangue and developed a new spectral index to achieve the automated quantification of fixed carbon content Thermal infrared spectroscopy analyses Quantitative Inversion of Fixed Carbon Content in Coal
Opportunities, challenges and modification methods of coal gangue
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 2024年2月2日 In low watertobinder ratio mixtures, the inhibitory effect of carbon in coal gangue on cement hydration is more pronounced Therefore, it is necessary to calcine the 01 mm coal gangue particles with high carbon content when using coal gangue aggregate to prepare highstrength cement concreteStudy on the calorific value and cementitious properties of coal gangue 2018年12月10日 Request PDF Distribution of polycyclic aromatic hydrocarbons（PAHs）in coal gangue and emitted gas with lowtemperature spontaneous combustion in situ Five coal gangue samples from the Du Distribution of polycyclic aromatic hydrocarbons（PAHs）in coal 2024年11月1日 Numerous studies have shown that coal gangue exposed to air weathers oxidizes rapidly, causing its physicochemical properties to change and resulting in the release of harmful elements (Zhang et al, 2008)Weathered coal gangue can cause greater environmental pollution than fresh coal gangue (Guo, 1985)Studies on the environmental impacts of open Enrichment characteristics of polycyclic aromatic hydrocarbons in coal
The influence of carbon imperfections on the physicochemical
2023年12月15日 The carbon content and carbon distribution significantly affect the macroscopic physicochemical properties of coal gangue aggregates Carbon, as a defect, is uniformly distributed in coal gangue, which increases the crushing value of coal gangue aggregates and greatly reduces their soundness, leading to the “secondorder adverse effect” and 2024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 2024年12月1日 To investigate the adsorption and migration behavior of oxygen in coal gangue with different pore sizes, this study characterizes the multiscale morphology of coal gangue pores and fractures using SEM NMR, and lowtemperature N 2 (77 K) adsorption methods As well, the study simulates the adsorption and diffusion behavior of O 2 within the pore structures of coal Study on the variability of oxygen adsorption behavior in coal gangue 2024年5月1日 Coal plays a crucial role as a mineral resource worldwide However, approximately 10 %–15 % of mined coal remains as commercially worthless coal gangue after the mining and purification process is completed (Li and Wang, 2019)The utilization of coal gangue inevitably leads to secondary environmental pollution through processes such as combustion, Enhancing the carbon content of coal gangue for composting
Assessment of heavy metal in coal gangue: distribution, leaching
2018年9月18日 In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were collected from a 2022年6月26日 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 aggregate on Using Chinese Coal Gangue as an Ecological Aggregate and Its2022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 (PDF) Underground Disposal of Coal Gangue Backfill 2024年11月1日 Synergistic performance of microwaveactivated coal gangue with limestone in lowcarbon cement Author links open overlay panel Ling Wang a 1, Shiyong Mi a 1, Junfei Zhang a, Hao Zhou a b Show more Add to Mendeley The distribution and integration of CaCO₃ particles appear suboptimal, resulting in weak points that reduce Synergistic performance of microwaveactivated coal gangue with
Distribution pattern of polycyclic aromatic compounds in coal gangue
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 Synthesis and characterization of lowcarbon cementitious materials from suspended calcined coal gangue Shaowu Jiu, Mingming Wang, Yanxin Chen*, Jingyi Chen andSynthesis and characterization of lowcarbon cementitious 2019年10月1日 Request PDF Selenium in Chinese coal gangue: Distribution, availability, and recommendations Coal gangue accounts for a large proportion of the solid waste in China, and greater attention has Selenium in Chinese coal gangue: Distribution, availability, and 2024年9月20日 Coal gangue contains a portion of clay minerals, and after thermal activation of about 700 ℃, the kaolinite in calcined coal gangue (CCG) can be transformed into metakaolin, which has pozzolanic activity and can be used as supplementary cementitious materials (SCMs) [10], [11], [12]This can not only consume a large portion of discharged coal gangue, but also Improvement of strength and microstructure of lowcarbon
Environmental hazards and comprehensive utilization of solid waste coal
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]2024年6月4日 Coal gangue is a kind of blackgray rock with lower carbon content and harder than coal in the process of coal formation As the main solid waste in the process of coal mining and processing, the distribution of coal gangue is significantly related to the occurrence and regional distribution of coal resourcesCharacteristics of Coal Gangue and Present Situation and 2020年7月3日 Distribution and occurrence of aromatic compounds and elements in the coal gangue dump from Fengfeng Coal Mine 5 and their influences on the environments have been studied in this paperDistribution of Polycyclic Aromatic Hydrocarbons in Coal Gangue carbon, coal gangue is generally dominated by oxides: SiO2 at 30~60%, Al2O3 at 15~40%, Fe2O3 at 2~10%, CaO, MgO, and K2O at 1~4% There are also other trace elements such as boron and nickelUnderground Disposal of Coal Gangue Backfill in China
Quantitative Inversion of Fixed Carbon Content in Coal Gangue
Quantitative Inversion of Fixed Carbon Content in Coal Gangue by Thermal Infrared Spectral Data Liang Song 1, Shanjun Liu 1,* and Wenwen Li 2 1 School of Resources and Civil Engineering, 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 metals carbon, coal gangue is generally dominated by oxides: SiO2 at 30~60%, Al2O3 at 15~40%, Fe2O3 at 2~10%, CaO, MgO, and K2O at 1~4% There are also other trace elements such as boron and nickelUnderground Disposal of Coal Gangue Backfill in China2012年5月1日 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 The Current Situation of Comprehensive Utilization of Coal Gangue
Separation and Recovery of Valuable Carbon Components and
Figure 3 Mineral distribution characteristics of the coal gangue samples (a) Coal−kaolinite intergrowth, (b) coal−pyrite intergrowth, (c) coal−kaolinite−pyrite intergrowth, and (d) quartz monomer (magnification:500 ×) Table 1 Contents of Li and Ga in the Coal Gangue element Li Ga content (μg/g) 34447 3047352 Figure 1 Regional distribution of the sampling areas (three states in northern Germany) and the profile Table 1 The soil samples (single sample for each) texture and sampling depths in Study on the spatial distribution regularities of coal gangue 2023年12月8日 Coal gangue is one of China’s main industrial solid wastes, which contains various harmful heavy metal elements, such as lead (Pb) The longterm 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 accumulation in the food Migration transformation, prevention, and control of typical heavy 2023年1月1日 The carbon content and carbon distribution significantly affect the macroscopic physicochemical properties of coal gangue aggregates Carbon, as a defect, is uniformly distributed in coal gangue The Influence of Carbon Imperfections on the Physicochemical
Mineralogical composition of coal gangue in various countries/
Coal gangue is the main solid waste generated during the coal mining and washing process, which accounts for 15% to 20% of the coal production [2]2023年9月1日 A bowlshaped structurecontrollable hydrothermal carbon experiment design combined with DFT simulation: Efficient adsorption of Cd and Pb in coal gangue accumulation areasA bowlshaped structurecontrollable hydrothermal carbon 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 2024年2月2日 In low watertobinder ratio mixtures, the inhibitory effect of carbon in coal gangue on cement hydration is more pronounced Therefore, it is necessary to calcine the 01 mm coal gangue particles with high carbon content when using coal gangue aggregate to prepare highstrength cement concreteStudy on the calorific value and cementitious properties of coal gangue
Distribution of polycyclic aromatic hydrocarbons（PAHs）in coal
2018年12月10日 Request PDF Distribution of polycyclic aromatic hydrocarbons（PAHs）in coal gangue and emitted gas with lowtemperature spontaneous combustion in situ Five coal gangue samples from the Du 2024年11月1日 Numerous studies have shown that coal gangue exposed to air weathers oxidizes rapidly, causing its physicochemical properties to change and resulting in the release of harmful elements (Zhang et al, 2008)Weathered coal gangue can cause greater environmental pollution than fresh coal gangue (Guo, 1985)Studies on the environmental impacts of open Enrichment characteristics of polycyclic aromatic hydrocarbons in coal 2023年12月15日 The carbon content and carbon distribution significantly affect the macroscopic physicochemical properties of coal gangue aggregates Carbon, as a defect, is uniformly distributed in coal gangue, which increases the crushing value of coal gangue aggregates and greatly reduces their soundness, leading to the “secondorder adverse effect” and The influence of carbon imperfections on the physicochemical 2024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
Study on the variability of oxygen adsorption behavior in coal gangue
2024年12月1日 To investigate the adsorption and migration behavior of oxygen in coal gangue with different pore sizes, this study characterizes the multiscale morphology of coal gangue pores and fractures using SEM NMR, and lowtemperature N 2 (77 K) adsorption methods As well, the study simulates the adsorption and diffusion behavior of O 2 within the pore structures of coal 2024年5月1日 Coal plays a crucial role as a mineral resource worldwide However, approximately 10 %–15 % of mined coal remains as commercially worthless coal gangue after the mining and purification process is completed (Li and Wang, 2019)The utilization of coal gangue inevitably leads to secondary environmental pollution through processes such as combustion, Enhancing the carbon content of coal gangue for composting 2018年9月18日 In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were collected from a Assessment of heavy metal in coal gangue: distribution, leaching 2022年6月26日 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 aggregate on Using Chinese Coal Gangue as an Ecological Aggregate and Its