The domestic status of coal gangue

Summary of the Utilization Status of Coal Gangue hanspub

In this paper, the properties of coal gangue were briefly described, and the utilization status of coal gangue of the current domestic and foreign was summarized In the end, the problems 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 Therefore, addressing the water, atmospheric, and soil environmental pollution caused by coal mining and coal gangue accumulation, this paper summarizes the relevant research progress Current situation and progress of coal gangue resource utilization

Environmental hazards and comprehensive utilization of solid

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 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 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 useful components such Research Progress on Comprehensive Utilization of 2024年9月7日  The raw coal gangue requires appropriate modification to improve its performance, activate its beneficial ingredients, enhance its water and fertilizer retention, and Opportunities, challenges and modification methods of coal

Opportunities, challenges and modification methods of coal gangue

2024年9月7日  Coal gangue is a complex industrial solid waste mixed with organic compounds, inorganic compounds and minerals (Fabiańska et al 2013)Its major chemical compositions are SiO 2, Al 2 O 3 and Fe 2 O 3, with traces of CaO, P 2 O 5, MgO and MnO 2The chemical composition of coal gangue from various sources and its comparison with soil reference compressive strength changes and coal gangue content at different curing ages, as illustrated in Fig 3 The inclusion of coal gangue tends to reduce early strength, with the exception of CG20, where the addition of 20% coal gangue powder results in a strength increase of 159%Current status of research on the mechanical properties of gangue 2022年12月26日  Top coal caving is a process for the rational extraction of large amounts of coal resources However, this process readily causes release of excessive amounts of gangue during the coal release process The conventional technique, which involves visual inspection, is not only laborintensive but also can introduce inaccuracies Coal and gangue identification methods A review of coal gangue identification research—application to 2012年7月2日  This paper provides an overview on the current status of power generation in China using coal gangue The government regulation towards the use of coal gangue for power generation is introduced(PDF) Power Generation from Coal Gangue in China: Current Status

Research Progress on the Utilization of Coal Gangue for Soil

The massive accumulation of coal gangue not only pollutes the surrounding environment but also constitutes a waste of the resource itself The pathways and current research status of coal gangue in soil utilization and as soil amendment agents are systematically reviewed, including direct land application of coal gangue, improvement of soil with mixtures of coal gangue, soil, 2023年9月8日  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’ coal pressure, coal gangue emissions, Coal Mine Solid Waste Backfill Process in China: Current Status 2023年12月25日  The pathways and current research status of coal gangue in soil utilization and as soil amendment agents are systematically reviewed, The method of making nutritive soil from domestic sludge in one minute: CN99[P] 2023−07−24 Google Scholar [74] 肖作义, 白昕冉, 郑春丽, 等 Research Progress on the Utilization of Coal Gangue for Soil 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

Characterization studies on coal gangue for sustainable geotechnics

2020年2月5日  Global rise in greenhouse gas emissions (GHG) is triggered mainly due to the consumption of fossil fuels for power generation and domestic usage Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process Coal gangue, a residue produced during the coal mining process, has Coal gangue is a kind of significant byproduct during coal mining and coal preparation processes Due to the lack of effective comprehensive utilization methods, a large amount of coal gangue cannot be effectively utilized and can only be stored onsite, especially in the northwest region of China The storage onsite occupies lots of land resources, and also causes severe Research on comprehensive utilization technology and standard 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 Power generation from coal gangue in China: current status and development Adv Mater Res, 550 (553) (2012), pp 443446 View in Scopus Google ScholarReview Highcapacity utilization of coal gangue as supplementary 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

The Current Situation of Comprehensive Utilization of Coal Gangue

2012年5月1日  Coal gangue is one of the largest industrial solid wastes in China; the comprehensive utilization of coal gangue has important social, economic and environmental benefits In this paper, the coal gangue and comprehensive utilization have been discussed in detail Through the survey results, expounds the development of the use of coal gangue and 2024年3月14日  With the continual advancement of coal resource development, the comprehensive utilization of coal gangue as a byproduct encounters certain constraints A substantial amount of untreated coal gangue is openly stored, particularly acidic gangue exposed to rainfall The leaching effect of acidic solutions, containing heavy metal ions and other Environmental impact assessment of acidic coal gangue2024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 Keywords: gel–foam; chitosan; acrylic acid; coal gangue 1 Introduction Coal is the most commonly used energy source at present; consequently, coal mining brings a large amount of coal gangue emissions The most commonly used treatment method for coal gangue is natural accumulation, to form a coal gangue mountain ChinaPreparation, Properties and Application of Gel Materials for Coal

Exploring calcined coal gangue fines as the total substitute of fly

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 2021年10月12日  After years of development, paste backfill technology has become an important part of China’s green safety mine construction and coal green mining technology system in the new era In this paper, the research status of paste backfill technology in China’s coal mines is expounded from the aspects of paste backfill materials, strata control theory, and paste backfill Development overview of paste backfill technology in China’s coal 2023年8月18日  Coal spontaneous combustion disasters are one of the most serious types of mine disasters in China at present, posing a huge threat to underground personal safety and coal production operations In order to prevent and control coal spontaneous combustion hazards and construct an efficient early warning system, this paper presents a review of coal spontaneous Analysis of the Current Status and Hot Technologies of Coal2021年5月1日  Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China The disorderly accumulation of coal gangue not only occupies a large amount of Review of Coal Gangue Characteristics and Ecological Restoration

The influence of carbon imperfections on the physicochemical

2023年12月15日  In order to promote the development of coal gangue aggregate concrete and the resource utilization of coal gangue solid waste, the coal gangue samples were crushed into aggregates, and then the macroscopic characteristics and microscopic structures of the aggregates were characterized through methods such as calcination, sulfuric acid solution dry Coal gangue is a waste generated in the process of coal mining and coal washing, and has become one of the solid wastes of China’s largest industrial generation and emissions Gangue accumulation caused great waste of land resources and seriously affected the ecological environment In this paper, the properties of coal gangue were briefly described, and the Summary of the Utilization Status of Coal Gangue2023年12月21日  Deepland resource exploitation is a crucial focus of future scientific and technological development in China However, with the increasing depth of coal mining, rock burst disasters occur frequently, posing significant threats to the safe and efficient mining of coal mines Therefore, it is of paramount importance to investigate mechanisms of rock burst, develop Review of the development status of rock burst disaster 2012年1月1日  Historical experience shows that a large number of coal gangue will be produce in the development of coal process The coal gangue will occur environmental pollution This paper summarized the domestic and international coal gangue researching issues, such as basic characteristics, pollution mechanism, model research, and Progress of Coal Gangue Research SpringerLink

Comprehensive utilization and environmental risks of coal gangue: A

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)2019年8月25日  Coal gangue is the largest amount of industrial solid waste in China It caused serious damage to the ecological environment and waste resources Therefore, it is of great significance to realize the resource utilization of coal gangue, protecting the environment and realizing the sustainable development of society This paper summarizes the utilization of coal The Current Situation Research on Comprehensive Utilization of Coal Gangue2023年9月21日  In this study, the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism The activation process of coal gangue was optimized through orthogonal tests, and the BackPropagation (BP) neural network model was improved using a genetic algorithm With the effects of grinding duration, calcination temperature, and Study on the Reactivity Activation of Coal Gangue for EfficientMoreover, coal gangue was a byproduct of the coal mining and washing processes, accounting for approximately 10 %–25 % of the total raw coal production [[9], [10], [11]]Its carbon content was relatively low and its hardness was higher than that of coal [12]According to the data of China Resources Comprehensive Utilization, the production amount of coal gangue in 2021 Synergistic action and effect mechanism of coal gangue powder

Microstructure of Coal Gangue and Precipitation of Heavy

2017年11月23日  The microstructure and mineral composition of the gangue play a decisive role in the precipitation of heavy metal elements In this study, the microstructure, mineral composition, and minimizes ineffective transportation and saves coal capacity; this method can also be used to ensure good conditioning for coal gangue In China, the coal preparationCOAL PREPARATION TECHNOLOGY: STATUS AND 2017年9月18日  In recent years, the ecology, security, and sustainable development of modern mines have become the theme of coal mine development worldwide However, spontaneous combustion of coal under conditions of A review on the mechanism, risk evaluation, and 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

Influence of coal gangue mulching with various thicknesses and

2021年7月28日  Coal gangue occupies large swathes of land resources, reduce soil evaporation, and improve the soil hydrothermal status and ecological activity; moreover, 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 Research Article Microstructure of Coal Gangue and Precipitation of Heavy Metal Elements Yanli Huang, Junmeng Li, Tianqi Song, Qiang Sun, Guoqiang Kong, and Fengwan WangMicrostructure of Coal Gangue and Precipitation of Heavy2021年11月18日  To improve the ecological protection of coal gangue slopes, slope: status and challenges,” T ransportation Safety and Environment, vol 2, no 1, pp 3–17, 2020Research on the Ecological Protection of Coal Gangue Slope

Impact of FreezeThaw Cycles on the Weathering and

22 Experimental Methods Sample Procurement Unweathered coal gangue for the investigation was sourced from the surface mine in May 2022 Fresh, pristine coal gangue was harvested from the face to circumvent any environmental factors that might compromise the study (Fig 2 a) Upon collection, the specimens were sealed and promptly transported to the laboratory for This paper introduces the hidden dangers of coal gangue to the environment and safety, and emphasizes the importance of underground intelligent coal gangue sorting technology It reviews the current research status of coal gangue sorting methods, summarizes the key technologies, proposes innovative concepts and related devices and methodsResearch and prospect of underground intelligent 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 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 Identification and Activation of Coal Gangue and Performance

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