Harmful gases produced by coal gangue

Comprehensive utilization and environmental risks of coal gangue:

2019年12月1日  A large number of piles of coal gangue not only occupy abundant land resources, but are also prone to spontaneous combustion release such as SO 2 , NO x , and 2024年2月1日  The research results of life cycle method reveal the utilization prospect of CG products, systematically analyze the harmful characteristics of HMs in coal gangue and their Representative coal gangue in China: Physical and chemical 2023年12月8日  Spontaneous combustion of coal gangue dumps not only releases toxic and harmful gases, polluting the environment, but also leads to explosion accidents and casualties due to improper handling This paper Detection of Spontaneous Combustion Areas of Coal 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

Lowcarbon utilization of coal gangue under the

2023年5月25日  Spontaneous combustion of coal gangue produces harmful gases that cause atmospheric pollution [5, 9] and pose a serious risk to human health in the coal mining area [9] In addition, large coal gangue piles in 2024年3月15日  The natural ignition of CG will not only lead to the generation of large amounts of toxic and harmful gases but also easily cause gangue mountain collapses, blowouts, and explosionsStudy on Pyrolysis and Oxidation Characteristics of 2024年6月4日  At the same time, coal gangue may also produce spontaneous combustion and release toxic gases, such as CO, SO 2, H 2 S, and NO X, etc (Jianfeng et al 2010), which not Characteristics of Coal Gangue and Present Situation and Prospect 2024年5月1日  In this study, the risk of spontaneous combustion of CG after oxidation at 80 ℃ under 3% oxygen concentration was the strongest The results of this paper are of great Study on the secondary oxidation behavior and microscopic

Study on Natural Characteristics of Coal Gangue Oxidation under

2024年11月8日  In the process of spontaneous combustion of gangue piles, a large amount of toxic and harmful gases such as CO, H 2 S, and SO 2 are produced, which causes serious 2017年10月1日  Results showed that after calcining with mineral powders, the crushing rate of coal gangue decreased from 168 % to 161–132 %, and water absorption decreased from 529 % to 274–390 % Environment influences and extinguish technology 2021年11月20日  Coal gangue is a kind of kaolin associated with coal, and the production one ton of coal would produce 100–150 kg of coal gangue (Lü et al, 2014) After years of coal mining, the accumulative deposit amount of coal gangue has reached 45 billion tons only in China, and that still keeps growing with a speed of 03–035 billion tons a year ( Yun et al, 2017 )Efficient removal of water pollutants by hierarchical porous zeolite 2023年12月8日  Spontaneous combustion of coal gangue dumps not only releases toxic and harmful gases, polluting the environment, but also leads to explosion accidents and casualties due to improper handling This paper Detection of Spontaneous Combustion Areas of Coal

The realtime detection method for coal gangue based on

2023年9月12日  The combustion of coal gangue produces harmful gases such as CO2, SO2, and NO2, causing air pollution reduce the emissions of harmful gases that may be produced during coal combustion2023年10月25日  Coal gangue is a solid waste formed during coal production, and the acid mine drainage it generates during openpit storage severely pollutes the ecological environment of mining areas Microorganisms play a crucial catalytic role in acidification, and their species and gene functions change during the oxidation process of coal gangue In this study, the changes The Relationship between Acid Production and the Microbial 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 Underground Disposal of Coal Gangue Backfill in China MDPI2023年7月12日  Coal gangue, as an associated product of coal mining, can cause a large number of piles to undergo slow oxidation and spontaneous combustion, resulting in the production of toxic and harmful gases, leading to casualties, environmental damage, and economic losses Gel foam has been extensively employed as a fireretardant material in coal Research on the fire extinguishing performance of new gel foam

Characteristics of sulfatereducing bacteria and organic bactericides

2020年11月1日  Fig 6 a shows that the SO 4 2 − concentration of newly produced coal gangue is low, representing only 10% of that of weathered coal gangue The SO 4 2 − concentration of CK first increases, then decreases, reaching a maximum value of 70887 mg L −1 after 21 d, and then sharply decreases to 36247 mg L −1 2024年6月29日  In 2022, China's total coal production was 256 billion tonnes, and the comprehensive utilization rate of the coal gangue was 732%, implying that China's stock of coal gangue is still increasing by 103 million tonnes per year, and it has already become the largest solid waste in China's production (Wang et al, 2023)Effects of bactericides and sulphate reducing bacteria addition on 2019年12月1日  The heat continues to accumulate during the accumulation process, which leads to spontaneous combustion with the oxidization of coal gangue (Ozdeniz et al, 2010), releasing a large number of SO 2, NO x, CO and other harmful gases into prehensive utilization and environmental risks of coal gangue: A Coal gangue, produced during causes serious environmental, social, and economic problems in the coal mining area [5 ] Heavy metals and harmful organic substances in coal gangue can pollute soil and water resources [6 , 7] and greatly impact the mining environment [2, 8] Spontaneous combustion of coal gangue produces harmful gases that Lowcarbon utilization of coal gangue under the carbon

Lightweight aerated concrete based on activated powders of coal gangue

2024年2月23日  The buildup and longterm storage of CG not only consume precious land resources but also pollute the air by releasing considerable volumes of harmful gases [20] There have been several cases of this solid waste being recycled in various sectors, including cementitious materials2024年11月1日  Reducing air pollution: coal gangue will emit a large number of harmful gases such as sulfur dioxide, carbon dioxide, carbon monoxide, hydrogen sulfide and nitrogen oxides, Saving land resources: coal gangue is produced in large quantities in Wind speed effect on infraredimagebased coal and gangue 2024年1月2日  Foamed ceramics were prepared by the water spray granulation and post particle stacking method using coal gangue as the main raw material The effects of raw material weight ratio (ie, raw Coal gangue‐based ceramics foams by water spray granulation 2024年7月1日  Stacked coal gangue occupies a large amount of land and can also cause soil and air pollution [16] In addition, oxidation and spontaneous combustion may occur within the coal gangue pile Combustion may release a large amount of harmful gases containing nitrogen and sulfur elements, polluting the environment [13]Separate recycling of iron and aluminum from ironrich red mud by coal

Study on Natural Characteristics of Coal Gangue Oxidation under

2024年11月8日  By comparing the oxygen consumption and volume fractions of gases such as CO, CH 4, and C 2 H 6 produced from coal gangue treated at different moisture contents, it was found that the lowtemperature oxidation characteristics were optimal at a moisture content of 25% a large amount of toxic and harmful gases such as CO, 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 Opportunities, challenges and modification methods of coal gangue 2020年8月1日  Coal gangue spontaneous combustion produces toxic and harmful gases This research aims to study a new type of polymer nanocomposite inhibitor to prevent and control coal gangue spontaneous A novel high polymer nanocomposite inhibitor for coal gangue 2021年9月1日  Coal gangue is the solid waste produced during coal mining and accounting for about 10–20% of total coal output The harmful gases such as CO, SO 2, NO x, H 2 S, P 2 O 5, etc will be then generated to cause environmental issues [4, 5]Mineral phase transformation in coal gangue by high temperature

FiberReinforced Coal GangueBased Alumina Aerogel

2024年5月11日  An aluminum silicate fiber/alumina aerogel (ASF/AA) composite was prepared via the solgel method and atmospheric drying (APD) method using coal gangue (CG) solid waste from Xingxian county, Shanxi Province, as the aluminum source Utilizing N2 adsorption, scanning electron microscopy, Fourier transform infrared spectroscopy, Xray diffraction, and thermal In the coal mining and utilizing process, the average emissions of coal gangue is about 15% of coal * Corresponding author Tel:+91; fax:+86029Environment influences and extinguish technology of spontaneous 2023年11月6日  Traditional Coal Gangue Separation Process and Equipment Water washing and dry coal preparation are the main parts of coal preparation Spiral separation, jigging, heavy medium separation, and other processes are Full article: A review of intelligent coal gangue 2023年2月1日  increasing amount of coal gangue produced is a serious threat to the ecological environment ignition point of coal Toxic and harmful gases such as CO, CO 2, SO 2, H 2 S, Fabrication and application of porous materials made

Characteristics of Coal Gangue and Present Situation and

2024年6月4日  The coal industry is an important pillar industry of economic development in China, with coal mining produced a lot of coal gangue, which is occupied land, and pollution of the environment, and the production and life of coalproducing areas have been seriously affected, coal gangue has become a heavy burden restricting the sustainable development of coal 2021年12月1日  A large number of coal gangue hills and spontaneous combustion scenes appear in coal mines, and harmful gases generated by spontaneous combustion are discharged into the atmosphere, polluting the air Pollution emission caused by CG spontaneous combustion is an important component of environmental pollution sources in China (Wang et al, 2016)The effect of biomass addition on pyrolysis characteristics and Coal gangue, produced during causes serious environmental, social, and economic problems in the coal mining area [5 ] Heavy metals and harmful organic substances in coal gangue can pollute soil and water resources [6 , 7] and greatly impact the mining environment [2, 8] Spontaneous combustion of coal gangue produces harmful gases that Lowcarbon utilization of coal gangue under the carbon2023年8月1日  Coal is the most abundant and widely distributed fossil fuel on earth, and it is also the ballast stone of China's energy system Coal accounts for more than 27 % of the world's primary energy [1], [2], and pyrolysis and combustion are the main ways of coal utilizationIn the mining of coal, a large amount of coal gangue (CG) is interspersed, the current accumulation Study on secondary oxidation characteristics of coal gangue at

Environmental hazards and comprehensive utilization of solid waste coal

2024年4月1日  Energy and environmental concerns pose significant threats to the survival of humanity and the Earth's ecosystem The escalation of greenhouse gas emissions, predominantly CO 2 and other gases, due to human activities in contemporary industrialized societies, has led to an increased frequency of natural disasters and extreme weather events, as well as a rise in 2024年2月1日  Coal gangue (CG), as a solid waste generated in the process of coal mining and washing, has also been growing rapidly in alarming quantity At present, the cumulative deposition of CG in China has exceeded 7 billion tons, and is increasing at a rate of 600 million tons per year ( Jabłońska et al, 2017 ; Li and Wang, 2019 )Efficient benzo(a)pyrene degradation by coal ganguebased 2022年6月1日  Coal gangue contains a large number of heavy metal elements, including Cr, Cu, Ni, Pb, Zn, etc The environmental pollution caused by longterm open storage is extremely serious [12]Zhou et al [13] studied the mineral composition and the transformation behavior of trace elements at different temperatures during CG combustion They found that the Influence of biomass on multicomponent reaction model and A simplified model for SO2 generation during spontaneous combustion of coal gangue was put forward and validated using the is estimated to be approximately 10–15% of the raw coal produced, As, Hg, and Pb) that A Simplified Model for SO2 Generation during

Using Chinese Coal Gangue as an Ecological

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 2024年3月8日  Oxidation and spontaneous combustion exist during the longterm coal gangue accumulation, and harmful gases such as SO 2, NO x, and CO can also be released The SAHP soil stabilizer produced by Zhuonengda Construction Technology CoLtd was applied to improve natural coal gangue in this study (Figure 2(b))Study of Road Performance and Curing Mechanism of Coal Gangue Coal gangue spontaneous combustion produces toxic and harmful gases This research aims to study a new type of polymer nanocomposite inhibitor to prevent and control coal gangue spontaneous combustion Nanomodification of montmorillonite (MMT) was carried out on high polymer emulsion inhibitor polyacrylamide (PAM) to improve its thermal stability and overcome A novel high polymer nanocomposite inhibitor for coal gangue emissions Coal gangue emissions are characterized by wide distribution, large volume, easy environmental pollution, and long duration [3] The combustion of coal gangue produces harmful gases such as CO2, SO2, and NO2, causing air pollution Moreover, coal gangue combustion also gener ates a large amount of soot, which can be easily inhaled byThe realtime detection method for coal gangue based on

Pyrolysis characteristics, artificial neural network modeling

2021年1月10日  Taking coal as an example, the byproduct (coal gangue) produced in the mining process is extremely harmful to the soil, water and atmospheric environment Coal gangue (CG) is a solid waste with low heating value The massive emission of harmful gases (CO, SO 2 2024年5月1日  Spontaneous combustion of coal gangue (CG) hills has caused varieties of secondary disasters that seriously endanger the ecological environment of the world The emission law of index gases and their oxidation kinetics during the secondary oxidation process of CG with different ranks of oxidation were studied by using the temperature programmed Study on the secondary oxidation behavior and microscopic 2023年12月1日  The rapid development of coal mining industry leads to the surge of coal gangue (CG) output, which is a byproduct of coal mining, and has become one of the largest solid wastes in China [1]At present, the stock of CG in China has exceeded 7 billion tons, which has seriously affected people's lives and social economic development [2] Process design and optimization on selfsustaining pyrolysis and 2023年7月5日  The overexploitation of resources caused by the increasing coal demand has resulted in a sharp increase in solid waste emissions mainly gangue, which has made the burden on the environment, economy, resources, and society of our country heavier In order to achieve a balance between energy consumption and solid waste emission in the process of top coal Research on Coal Gangue Recognition Based on Multisource

Separation of gangue from coal based on supplementary texture

2019年3月29日  ABSTRACT The separation of coal and gangue is an important aspect of coal production, which can improve coal quality, save energy, reduce consumption, and enable the rational use of resources At present, manual selection remains widely implemented, but the working environment is harsh, labour intensity is high, and efficiency is low With the continual

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