Amounts of S, As, Hg, and F emissions from coal gangue spontaneous combustion show approximately 1.13 Mt, and 246, 45, and 63,298 tons in 2013, respectively. ... amount of sulfur from coal gangue ...
Coal gangue is produced in the washing and processing process of coal mining. Without treatment, it is dumped naturally to form a gangue mountain. Long-term heat storage leads to spontaneous combustion. Affected by coal quality of coal seam, there are many kinds of coal gangue, among which the washing gangue with high sulfur content has a large …
Coal gangue hills are prone to spontaneous combustion, thereby polluting the environment of mining areas such as the soil, groundwater, and atmosphere, and the frequent occurrence of gangue hill ...
In order to explore the reason for the frequency explosion of spontaneous combustion coal gangue dump and get to know their explosion mechanism, established the experiment platform about spontaneous combustion coal gangue dump interoperable water. The gangue dump was heated using the external heat source, and rainy weather …
DOI: 10.1021/acs.est.1c00150 Corpus ID: 233027359; Ambient PM2.5 and Related Health Impacts of Spontaneous Combustion of Coal and Coal Gangue. @article{Guo2021AmbientPA, title={Ambient PM2.5 and Related Health Impacts of Spontaneous Combustion of Coal and Coal Gangue.}, author={Wenkai Guo and Bing …
According to latest research, the factors affecting coal spontaneous combustion in goafs is determined by the systems-theoretic accident model and …
It is estimated that China has more than 5000 coal gangue dumps, of which approximately 1700 have combusted spontaneously, covering an area of about 1500 km …
Once spontaneous combustion occurs in high sulfur gangue hills, a large number of dusts, greenhouse gases such as CO 2 and CH 4 are produced [9]. It may …
Due to the continuous heating by the heat generated at the depth of 2.5 m and the sufficient conditions of oxygen supply and heat storage, the coal gangue at the depth of 1.5 m was ignited. The spreading trend of spontaneous combustion was from the fire source (2.5 m deep) to the outside of the gangue hill (1.5 m deep).
Qin et al. [24] unveiled U 2-Net in 2020, a sophisticated deep learning framework designed for the detection of salient objects.U 2-Net unveils itself as a dual-layer U-shaped network architecture, possessing the capacity to extract intricate details while upholding computational efficiency.In accordance with the visual representation in Fig. 1, …
The process of spontaneous combustion of coal and coal waste gobs including emitted gases, condensation of inorganic and organic species in vents, and leachable potential are examined in this study which encompasses a literature review and new experimental data. Furthermore, the potential environmental benefits of cover soil …
spontaneous combustion of coal gangue mountain, based on the research idea of "heat transfer and cooling," the prevention and control methods are carried out focusing on the kinetic characteristics of uncontrolled spontaneous combustion and heat transfer process of coal gangue mountain. †e scientic management of re has important
The influence of water immersion on the spontaneous combustion characteristics of anthracite with high concentrations of sulfur-bearing minerals was studied using simultaneous thermogravimetry ...
The types of sulfur-containing compounds in the coal gangue samples were determined based on national standards such as 'Methods for Determination of Various Forms of Sulfur in Coal' (GB/T 215–2003), with the results shown in Table 2.The forms of sulfur present in coal gangue can affect the precipitation of sulfur-containing products …
Hou analyzed the spontaneous combustion theory and tendency of coal gangue and found that the internal threshold conditions for the spontaneous combustion …
In fire extinguishing process, loess isolation is used to prevent spontaneous combustion area from enlarging, loess cover reduces the air leakage in the spontaneous combustion area of Coal Gangue ...
The cementitious material used in this paper was ordinary Portland cement with a strength grade of 42.5R, and the coarse aggregates used were gravel (Fig. 2 a) and SCG (Fig. 2 b).The SCG was obtained from a coal mine in Fuxin, Liaoning Province, China, and was crushed, screened, and graded according to the technical requirements of …
To effectively evaluate the danger of coal gangue spontaneous combustion, this paper establishes a first-level assessment system for the danger of coal gangue …
A rough estimate of the annual amount of sulfur, arsenic, mercury and fluoride emission from spontaneous combustion of coal gangue in China was determined. The weighted mean concentrations of S, As, Hg, and F in coal gangue are 1.01%, 7.98, 0.18, and 365.54 mg/kg, respectively.
spontaneous combustion, causing many environmental problems such as air, soil, and water pollution. The oxidizing bacteria exacerbate problems such as acidification, spontaneous combustion,
The #3 and #15 coal seams are the main minable coal seams. The #3 coal seam has been found to demonstrate low spontaneous combustion propensity. Meanwhile, the #15 coal seam, which has a high sulfur content, has been observed to show high spontaneous combustion tendencies. In the gangue field of the Chengzhuang Coal. Preparation of …
DOI: 10.2139/ssrn.4084354 Corpus ID: 248223656; The Thermal Transformation Behavior and Products of Pyrite During Coal Gangue Combustion @article{Liu2022TheTT, title={The Thermal Transformation Behavior and Products of Pyrite During Coal Gangue Combustion}, author={Lihui Liu and Qinfu Liu and Shuai Zhang and Yakui Li and …
To overcome the short inhibition life of currently available inhibitors, a high polymer nanocomposite inhibitor was developed. The spontaneous combustion characteristics of coal gangue from the Yangquan mining area were studied through proximate analysis, scanning electron microscope/energy dispersive spectrometer …
Long-term accumulation of coal gangue hill has a high risk of spontaneous combustion, and the toxic and harmful gases emitted by spontaneous combustion seriously pollute the atmosphere.
Coal gangue, affected by spontaneous combustion and high temperature, can have the following impact on environment [11-12]. For one thing, spontaneous combustion of Coal Gangue Heaps releases ...
Semantic Scholar extracted view of "Characteristics of polycyclic aromatic hydrocarbon release during spontaneous combustion of coal and gangue in the same coal seam" by Haiyan Wang et al. ... Sulfur Conversion of Mixed Coal and Gangue during Combustion in a CFB Boiler. ... a high polymer nanocomposite inhibitor was developed.
Based on Eq. (2), the emissions of sulfur, arsenic, mercury, and fluoride from spontaneous combustion of coal gangue in China in 2013 are approximately calculated …
Remote Sens. 2022, 14, 5974 2 of 19 gases are released, which leads to severe atmospheric pollution. In addition, it also causes heavy metal pollution in soil and groundwater [6,7].
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.
In this study, an experimental model about the coal gangue stockpiles in semi-open storage was developed. According to the model's requirements, the corresponding coal gangues were piled up in the factory building, the heat source and collection points were arranged, and the four operating temperatures were selected from …
Noxious gases generated by the spontaneous combustion, including sulfur dioxide, nitrogen oxides, carbon oxides, and smoke, can cause air and ecological pollution, which threatens local residents ...
combustion gangue involving the process of spontaneous combustion, with sulde and nitride emissions through combustion. Its stability is far better than nonspontaneous combustion gangue 9,10 .
Hou analyzed the spontaneous combustion theory and tendency of coal gangue and found that the internal threshold conditions for the spontaneous combustion tendency of coal gangue backfill is a total sulfur content of greater than 1.0% and calorific value greater than 4.18 MJ kg −1.
Preparation of coal samples. This paper selects the high and low sulfur anthracite coal from the adjacent mining area of 5 coal seam in Yangquan No.5 Mine as the experimental coal sample.
36 spontaneous combustion of coal gangue dumps poses a serious threat to the environment and human 37 safety. This spontaneous combustion, by releasing a large number of toxic and harmful gases and
Coal gangue dumps are prone to spontaneous combustion due to their high contents of sulfur and carbon. The resultant dust and toxic gases such as SO 2, H 2 S, CO, and NO x would lead to serious …
Developing a quantitative hazard assessment model for spontaneous coal gangue combustion is imperative to ensuring the safety of coal mining operations. In …
Noxious gases generated by the spontaneous combustion, including sulfur dioxide, nitrogen oxides, carbon oxides, and smoke, can cause air and ecological pollution, which threatens local residents ...
DOI: 10.1016/J.JCLEPRO.2017.11.162 Corpus ID: 158282432; A novel dry beneficiation technology for pyrite recovery from high sulfur gangue @article{Duan2018AND, title={A novel dry beneficiation technology for pyrite recovery from high sulfur gangue}, author={Chenlong Duan and Chenyang Zhou and L. Dong and Yuemin Zhao and …
