Representative coal gangue in China: Physical and chemical …
1.2. Source and distribution of CG in China. CG is a kind of black gray shale rock produced in the process of coal production. China is the world's largest coal producer (Munir et al., 2020) and also the largest coal consumer.Coal provides about 62% of China's energy demand (Mita et al., 2015).In the process of sorting and processing, the production of …
Co-combustion and emission characteristics of coal gangue …
The reuse of coal gangue for energy recovery is developing rapidly in China, due to its advantage in achieving both economic and environmental benefits. Low …
Study on the thermal reaction characteristics and kinetics of …
Such results suggest that both endothermic and exothermic effects are significantly enhanced with the addition of coal gangue during the spontaneous …
Co-combustion and emission characteristics of coal gangue …
The reuse of coal gangue for energy recovery is developing rapidly in China, due to its advantage in achieving both economic and environmental benefits. Low-quality 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 …
Mercury emission from spontaneously ignited coal gangue hill …
The cause is believed that the oxidation of sulfur in pyrite in coal gangue generates heat and when heat accumulates it will first ignite pyrite at 290 °C and then release large amount of heat and ignite coal eventually [24], which resembles underground coal fire in principle, but receives much less attention [25], [26], [27]. Nationwide ...
Coal's Spontaneous Combustion Problem
Spontaneous combustion of coal is a well-known phenomenon, especially with PRB coal. This high-moisture, highly volatile sub-bituminous coal will not only smolder and catch fire while in storage piles at power plants and coal terminals, but has been known to be delivered to a power plant with the rail car or barge partially on fire…
Experimental study of thermophysical properties of coal gangue …
Besides, the coal gangue contains combustible components, which may ignite spontaneously under proper conditions, leading to instability of the coal gangue [53, 54]. Noxious gases generated by the ...
Mercury emission from spontaneously ignited coal gangue hill …
15, 16 Similar to the principle of coal spontaneous combustion, when the internal temperature of the gangue hills exceeds 60−80°C, the temperature rises sharply to the ignition point and ...
Experimental study on durability of self-ignite coal gangue …
Loss properties, through freeze-thaw and carbonization coupling or carbonization and freeze-thaw coupling environment tests, such as mass, dynamic elastic modulus, compressive strength, and carbonization depth were analyzed in order to investigate the durability of self-igniting coal gangue concrete under freeze-thaw and …
Research on the fire extinguishing performance of new gel …
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 has been extensively employed as a fire-retardant material …
Experimental study of thermophysical properties of coal …
High volatile content gangue could first catch on fire, and it was easy to ignite the fixed carbon in CG (Wang et al., 2014). As shown in Fig. 10, the higher …
A Parametric Study of Spontaneous Ignition in Large Coal …
The present code is compared with the model formulated by Arisoy and Akgun [] for predicting spontaneous combustion in moist coal.All the model parameters are kept the same as reported in Schmal et al. [], except for the moisture content in the coal, which is taken as 10%.However, the model reported by Arisoy and Akgun [] differs from …
How To Effectively Use Coal Gangue?
The escape or leaching of sulfide in coal gangue will pollute the atmosphere, farmland and water bodies. Gangue hills can also ignite spontaneously and cause fires, or collapse during the rainy season, blocking the river and causing disasters. The rational use of coal gangue can not only create economic value but also reduce …
Numerical Simulation of the Dynamic Change Law of Spontaneous …
To further study the problem of spontaneous combustion of coal gangue mountains, a multifield coupled simulation model was established based on the mathematical models of temperature field, gas ...
Study on the Reactivity Activation of Coal Gangue …
The coal gangue spontaneously ignites when exposed to the air for a long time, causing fires and resulting in heavy economic losses and a large amount of toxic gases such as carbon monoxide (CO), …
Study on Pyrolysis and Oxidation Characteristics …
Coal gangue spontaneous combustion has caused serious environmental and ecological problems. To investigate the reaction kinetic parameters of the gangue and the exothermic characteristics of the …
Numerical Simulation of the Dynamic Change Law …
To further study the problem of spontaneous combustion of coal gangue mountains, a multifield coupled simulation model was established based on the mathematical models of temperature field, gas …
Numerical Simulation of the Dynamic Change Law of Spontaneous …
To further study the problem of spontaneous combustion of coal gangue mountains, a multifield coupled simulation model was established based on the mathematical models of temperature field, gas concentration field, and seepage velocity field. In addition, the dynamic development law of these three p …
Study on carbonation depth of spontaneous combustion coal gangue …
In order to study the key durability index of spontaneous combustion coal gangue lightweight aggregate concrete, with consideration to different sensitivity factors such as the compressive ...
Mercury emission from spontaneously ignited coal gangue …
The recurring spontaneous combustions in the gangue hill exhibit two major manifestations on the slope surface: one is the numerous heat-alterated rock …
Detection of Spontaneous Combustion Areas of …
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 …
fossil fuel
"The Fire Below: Spontaneous Combustion In Coal". DOE/EH-0320, Issue No. 93-4. US Department of Energy. May 1993. How Coal Self-Ignites The coal's temperature begins to climb above ambient. At about 150-300 degrees F, it begins to …
Study on Spontaneous Combustion Characteristics of Waste …
The coal gangue at the depth of 2.5 m gradually developed into the fire source of spontaneous combustion. Due to the continuous heating by the heat …
The environmental pollution and control of coal gangue spontaneous
When the temperature reaches the ignition point, the residual coal and other combustibles in the gangue can ignite spontaneously. The spontaneous combustion of coal gangue piles leads to an ...