HOME→Physical properties of coal gangue Physical properties of coal gangue Physical properties of coal gangue
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Physical properties of coal gangue Physical properties of coal gangue Physical properties of coal gangue
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Experimental study of thermophysical properties of coal gangue at
2020年12月5日 The specific heat capacity (C p), thermal conductivity (λ), and thermal diffusion coefficient (D) of coal gangue (CG) are the main factors that affect the selfignition potential for The results show that (1) it is feasible that employing coal gangue to replace natural coarse and fine aggregates in concrete can prepare C30 and C40 concrete; (2) the addition of coalPhysical properties of coal gangue, including property 2020年4月30日 This paper investigated the influence of physical and chemical properties of coal gangue under different geological conditions and aggregate replacement rate (0, 30%, 60%, Effect of Physical and Chemical Properties of Coal Gangue Under Coal extraction in China is increasingly moving towards colder regions such as Xinjiang and Inner Mongolia However, these mines face land restoration challenges due to a scarcity of fertilePhysical properties of the coal gangue ResearchGate
Activation Mechanism of Coal Gangue and Its Impact
2022年9月15日 Then, the mechanism of physical activation (mechanical and thermal activation), chemical activation, and compound activation of coal gangue are illustrated The machinability, as well as the mechanical, microscopic, and 2024年6月4日 The origin, type, composition and geological characteristics of coal gangue should be discussed from the aspects of coal accumulation, diagenetic characteristics and Characteristics of Coal Gangue and Present Situation and Prospect 2024年2月1日 Therefore, this study systematically investigated the basic physical and chemical properties of coal gangue and municipal sludge samples, the ecological environment safety Representative coal gangue in China: Physical and chemical factors on the mechanical properties of the same geological conditions coal gangue applied to concrete; few researches concern the effect of physical properties and chemical composition Effect of Physical and Chemical Properties of Coal Gangue Under
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Study on the macro–micro evolution of compaction characteristics
2024年2月28日 For the grading characteristics of coal gangue in the hollow zone in underground filling, the state of pressure and the mechanical properties of coal gangue filling materials under2022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 Underground Disposal of Coal Gangue Backfill in 2014年6月26日 The chemical composition of coal has a strong influence on its combustibility The properties of coal are broadly classified as 1 Physical properties 2 Chemical properties Physical Properties Heating Value: The properties of coal PDF SlideShare2022年9月15日 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 Activation Mechanism of Coal Gangue and Its Impact
Chemical Characteristics of Coal SpringerLink
2015年1月1日 The physical properties of coal are closely linked to the chemical constituents and make up These features are both strongly influenced by the geochemical history of the coal, and are important factors for determining how coal behaves 2010年12月1日 In this paper, coal gangue is utilized as a replacement of coarse aggregate in structural concrete The effects of coal gangue on the mechanical properties of concrete material, circular Experimental study on basic properties of coal gangue aggregateThe 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 2015年1月1日 Other physical properties of coal such as optical, electrical and magnetic properties can also offer insight into the chemical structure and composition of coal The physical properties of coal, including the mechanical, electromagnetic, and optical properties, are related to structural models of coal The bulk thermodynamic properties of coal Physical Characteristics of Coal SpringerLink
Representative coal gangue in China: Physical and chemical properties
2024年2月1日 Therefore, this study systematically investigated the basic physical and chemical properties of coal gangue and municipal sludge samples, the ecological environment safety risk of heavy metals and 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 systematically discusses the ways and research status of coal gangue resource utilization, mainly including: extracting and recovering Research Progress on Comprehensive Utilization of Coal Gangue2019年12月1日 The accumulation of considerable coal gangue not only occupies a great deal of land resource, but also results in serious environmental problems, eg, soil pollution, air pollution, and geologic hazards (Stracher and Taylor, 2004)The heat continues to accumulate during the accumulation process, which leads to spontaneous combustion with the oxidization of coal Comprehensive utilization and environmental risks of coal gangue: A Download scientific diagram Physical properties of coal gangue aggregate from different origins in China from publication: Application of Coal Gangue as a Coarse Aggregate in Green Concrete Physical properties of coal gangue aggregate from different
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Lowcarbon utilization of coal gangue under the
2023年5月25日 The treatment and utilization of coal gangue, one of the main solid wastes produced during coal mining, are of great significance in environmental protection and resource development In the contemporary 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 2020年2月20日 A large amount of coal gangue buildup may be a potential fire hazard associated with the heat released by microorganisms accumulating to the point of spontaneous combustion in the presence of unburned coal, pyrite (FeS 2) and oxygenCoal gangue is likely to cause largescale fire and blast disasters, and produce a significant amount of toxic emissions Reactivity activation of waste coal gangue and its impact on the The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d and 28 d curing times, respectivelyEffects of Fine Gangue on Strength, Resistivity, and Microscopic
Physical, chemical, and geotechnical properties of coal fly ash:
2019年6月1日 Request PDF Physical, chemical, and geotechnical properties of coal fly ash: A global review In 2015, fly ash utilization rates were 70% for China, 62% for India, and 50% for the US This The physical properties and the behavior of coal play an important part in dictating the methods by which coal should be handled and utilized This chapter considers those properties such as, for example, density and hardness, which are definitely physical in nature, in contrast to the properties which arise by virtue of the molecular structural types that occur within the coalPhysical Properties Handbook of Coal Analysis Wiley Online 2020年5月1日 Basing on basic properties of coal gangue from No1 mine of Pingdingshan Tian’an coal group, authors made coal gangue concrete with coal gangue instead of some aggregate, fly ash and slag Effect of Physical and Chemical Properties of Coal Gangue 2024年7月12日 According to the mineral composition and content, CG can be divided into clay gangue, sandstone gangue, aluminum gangue, and calcareous gangue [16] The chemical composition and physical properties of CG are further determined by its mineral compositionReview Highcapacity utilization of coal gangue as supplementary
Synergistic action and effect mechanism of coal gangue powder
The effects of red mud and coal gangue powder on the physical properties, workability, and mechanical properties of concretes were evaluated, and the hydration reaction mechanisms were elucidated through microanalysis Furthermore, the reaction process was investigated through thermogravimetric analysis2023年3月1日 Semantic Scholar extracted view of "Preparation of ceramsite from leadzinc tailings and coal gangue: Physical properties and solidification of heavy metals" by Zhongtao Luo et al Skip to search form Skip to main content Skip Preparation of ceramsite from leadzinc tailings and coal gangue 2024年8月23日 Due to the abundance of microcracks, voids, and a higher carbon content, coal gangue displays increased water absorption and crushing value, while also having a lower apparent density compared to natural aggregates [15], [16]These shortcomings lead to reduced durability and mechanical properties when coal gangue is employed as a concrete aggregate, Enhancing coal gangue aggregates with fly ashcement slurry 2023年10月11日 Backfill mining can effectively alleviate the problems of surface collapse and ecological water pollution, in which the mechanical properties of backfill materials, including coal gangue and coal fly ash, have a decisive role in the effect of filling mining In this study, we analyze the permeability characteristics of coal gangue filler through a set of homemade Study on mechanical properties of coal gangue and fly ash
Effects of Fine Gangue on Strength, Resistivity, and Microscopic
2015年5月21日 The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 015 mm), fly ash, cement, and water In this study, the effects of the weight content (ranging 2019年12月1日 The physical/chemical properties of fly ash depend not only on the type of coal used in a process but also on the techniques used to burn the coal Specifically, properties of fly ash depend on: (i) boiler configuration, (ii) burning condition and temperature of the boiler, (iii) the particle size of the coal, and (iv) the gas cleaning equipment [ 25 ]Physical, chemical, and geotechnical properties of coal fly ash: 2020年12月7日 the amount of coal gangue, both the uncalcined coal gangue group and the calcined coal gangue group displayed a trend of 90 d compressive strength decr ease as compared to the 28 d compressive Study of Mechanical Properties and Durability of AlkaliActivated Coal 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 without appropriate utilization Comprehensive utilization and environmental risks of coal gangue
Study on the calorific value and cementitious properties of coal gangue
2024年2月2日 However, at a watercement ratio of 04, the negative effects of noncalcined coal gangue on the properties of the cement paste become apparent: the cement paste mixed with calcined coal gangue particles has the lowest content of calcium hydroxide and the highest content of ettringite, while the cement paste mixed with noncalcined coal gangue particles has 2021年7月28日 The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coalmined land with a high groundwater table Hydrol Process Influence of coal gangue mulching with various thicknesses and Request PDF On Mar 1, 2023, Zhongtao Luo and others published Preparation of ceramsite from leadzinc tailings and coal gangue: Physical properties and solidification of heavy metals Find Preparation of ceramsite from leadzinc tailings and coal gangue Abstract: Coal gangue is a solid waste with the largest emissions during the process of coal mining, processing, and utilization in Huainan mining areas Many coal emissions have caused worsening situations dealing with land occupation and the problem of ecological environment damage in mining areas The utilization of coal gangue for filling and land reclamation is not Physical and chemical properties and distribution characteristics
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Microstructure, Characterization and Mechanical Properties of Coal
2023年2月25日 Among them, five papers focus on the damage evolution and failure characteristics of coal and coallike materials under different conditions Four papers have studied the physical and chemical properties of new rock mass materials (coal gangue, coal tar pitch, freeze–thaw sandstone and anchored bedding rock mass)2024年2月28日 For the grading characteristics of coal gangue in the hollow zone in underground filling, the state of pressure and the mechanical properties of coal gangue filling materials under different Study on the macro–micro evolution of compaction characteristics Coal gangue is one of the solid wastes with the largest emission in China The application of coal gangue as a coarse aggregate in concrete conforms to the concept of green environmental protection, energy saving and emission reduction, and has received extensive attention from the construction industry and researchers On the basis of sammarizing research progress of coal Reviews of Research on Mechanical Properties and Durability of Coal 2024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 ecological environment Utilizing gangue as a coarse aggregate to produce gangue concrete (GC) presents a promising avenue for Enhancing Fatigue Performance of Coal Gangue Concrete (CGC
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Using Chinese Coal Gangue as an Ecological Aggregate and Its
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 2021年9月13日 High environment temperatures in deep coal mines may affect the strength and stability of cemented Coal GangueFly Ash Backfill (CGFB) This study aimed to analyze the consequences of temperature on the physical and mechanical Physicomechanical and microstructure properties of cemented coal 2024年6月4日 Secondly, the soil in coal gangue wasteland usually has many physical and chemical properties, such as poor physical structure, poor water and fertilizer holding capacity, extremely barren or unbalanced nutrient, high heavy metal content, and so on, in particular, high levels of heavy metals will cause longlasting and almost irreversible Characteristics of Coal Gangue and Present Situation and 2022年9月15日 After physical activation, coal gangue is used in geopolymer preparation with a chemical activator (alkali excitation agent), which effectively forms a threedimensional silicon aluminate polymer Activation Mechanism of Coal Gangue and Its Impact on the Properties
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Identification and Activation of Coal Gangue and Performance
2020年4月14日 22 Experiment The chemical composition measured by Bruker S8 TIGER XRF analysis; the mineralogical composition measured via Bruker D8 ADVANCE XRD analysis; thermal analysis conducted with Mettler Toledo analyzer in a temperature range of 30–1000 °C at a heating rate of 10 °C/min and N 2 or O 2 atmosphere Mortar strength test: prismatic mortar