(PDF) Experimental and numerical study on flame propagation ...
Coal is a lowcost and highcalorificvalue fuel. The coal mining industry worldwide has been suffering from severe accidents due to coal dust explosion hazards since its inception.
coal dust powder
Study on a New Type of Composite Powder Explosion Inhibitor Used to ...
After the red mud composite powder explosion inhibitor is added, the maximum pressure reduction rate of the coal dust is % for a 30% MCNNaHCO 3 composite powder explosion inhibitor, % for a 30% MCNKH 2 PO 4 composite powder explosion inhibitor and % for a 40% MCNAl(OH) 3 composite powder explosion inhibitor. By coal dust ...
Wetting behavior during impacting bituminous coal surface for dust ...
Coal is one of the most important energy sources in the world. Dust can be produced in the process of mining, processing, transportation, and use (Brodny and Tutak 2018: Xiu et al. 2020; Yuan 2020a).The diffusion of combustible coal dust may cause an explosion (Li et al. 2018).Longterm exposure of employees to air containing coal dust can lead to coal workers' pneumoconiosis and seriously ...
Numerical simulation of coal dust explosion suppression by inert ...
Inert powder is a common material to suppress coal dust explosion because of its convenience, low cost, high efficiency, and durability [10], [11]. Experimental studies show that inert powder can significantly reduce P max and (d P /d t ) max through heat transfer and momentum transfer between phases [12], [13], [14].
Influence of Volatile Content on the Explosion Characteristics of Coal Dust
The results showed that the volatile matter content in lignite dust has little effect on the maximum explosion pressure, with an average change rate of %. When the volatile content was reduced from to %, the maximum explosion pressure rise rate dropped by %. The explosion index of the experimental sample was in the range of ...
Coal Dust: What Is It, And Why Is It Dangerous? SureHire USA
Coal is an extremely brittle mineral, and both the extraction and refinement processes produce a fine powder known as coal dust. Coal is deliberately pulverized for use as fossil fuel, and this process also produces a substantial output of coal dust. Finally, mining, transportation and even the mechanical handling of coal can create coal dust.
Study on the preparation of green suppressors and their characteristics ...
1. Introduction. Coal resources still play an important role in industrial development [1], [2].In the process of coal mining, transportation, storage, etc., floating coal dust is easily generated and dust clouds are easily formed in the enclosed space [3].When the dust cloud encounters open flame or high temperature, the explosion and other disasters probably happen, causing huge loss of ...
Study on the effects of surfactants on the interface characteristics ...
To further explore the wetting mechanism of the interface between surfactant and coal dust. By constructing a surfactantwatercoal interfacial simulation system, the microscopic interfacial wettability of four surfactants, rapid penetrant T (RPT), sodium dodecylbenzene sulfonate (SDBS), dodecyl glucoside (APG), and cocamidopropyl betaine (CAB), on coal dust is discussed.
Experimental study on the influence of surfactants in ... ScienceDirect
Powder Technology. Volume 395, January 2022, Pages 766775. ... Coal dust, as one of the concomitants of coal mine production, is seriously limited the safe production efficiency of coal mines due to its potential explosive properties [2,3]. In addition, high concentrations of coal dust also polluted the underground working environment, which ...
Study on the adsorption and dust suppression mechanism of urease ...
The coal dust and coal dustbacterial complex samples were mixed with KBr powder and formed into transparent flakes, then observed by FTIR spectroscopy. Dust suppression experiment. ... Coal dust with 4080 mesh size particles exhibited the strongest antiwind erosion effect. In addition, the results of calcium carbonate yield and ...
Suppression characteristics and mechanisms of ABC powder on methane ...
The coal dust and ABC powder were measured by the laser particle size analyzer as shown in Fig. 2. D() (median diameter) of coal dust and ABC powder were μm and μm respectively, and the particle size of coal dust was slightly smaller than that of ABC powder.
Study on explosion suppression of coal dust with different particle ...
The results showed that when the proportion of stone powder in coal dust was 90%, the peak values of overpressure, flame temperature and flame velocity of coal dust, stone powder, gas composite explosion were, and times of that of coal dust and gas explosion, respectively. And the smaller particle size of stone powder had a ...
PDF Safety Data Sheet Nist
Coal Powder Not available Not available 100. SRM 2692c Page 2 of 5 . 4. F: IRST : A: ID : M: EASURES: Description of First Aid Measures: Inhalation: If adverse effects occur, remove to uncontaminated area. If not breathing, give artificial respiration ... Coal dust is listed by IARC as Group 3, "Not classifiable as to its carcinogenicity to ...
Coal Dust FAQ | BNSF
Why is BNSF concerned about coal dust in the Powder River Basin? Since 2005, BNSF has been at the forefront of extensive research regarding the impacts of coal dust escaping from loaded coal cars on rail lines in the Powder River Basin (PRB), which is located in Wyoming and Montana. From these studies, BNSF has determined that coal dust poses a ...
Coal Dust: A Superior Choice As A Binder For Charcoal Briquettes
Coal dust often and interchangeably known as anthracite is a material produced by the fine milling of anthracite coal. Anthracite is regarded as the superior form of coal. Coal dust also proves its mettle as a binder in other scenarios.. As binders are added prior to compaction and are responsible for particle agglomeration, it is critical that several factors are considered and an ...
(PDF) Experimental Study on the Ignition Sensitivity and Explosion ...
Gas coal dust explosion flame bright and discrete flame found in the combustion zone [3, 8], which is the thermal resolution of coal dust caused by the combustion of volatile components. The flame ...
Explosion characteristics of H2/CH4/air and CH4/coal dust/air mixtures ...
The minimum concentration for obtaining a coal dust explosion that propagated in the tube was 120 g/m 3 [15]. In other experiments, Methane/coal dust/air explosions and suppression characteristic had been studied [16]. The CH 4 /coal dust/air mixture was ignited by a 7 m long epoxy propane mist cloud explosion. A deflagrationtodetonation ...
A compound binder of coal dust wetting and suppression for coal pile ...
Most of the experiments involved in this paper were completed at a Chinese coal mine. According to the site conditions of the mine, samples were collected and prepared for several major dust spots in the mine, respectively: 1# dust is for pulverized coal of coal storage bunker; 2# dust is for coal rock powder of underground coal mine roadway, 3# dust is the road dust of main surface road.
Flame propagation and CO/CO2 generation characteristics of lignite dust ...
The physical and chemical properties of lignite dust are tested, and on this basis, the parameters are set as follows: the density of coal dust particles is set to 1000 kg/m 3, the specific heat of coal dust is set to 1100 J/(kg·K), the volatile content of coal dust is set to %, the dust volatile content release temperature is set to 773 ...
Variation of ignition sensitivity characteristics of nonstick coal ...
Relationship between the minimum ignition energy of the coal dust cloud and the initial powder injection pressure. Figure 9. Open in new tab Download slide. As shown in Figure 9, the minimum ignition energy of the coal dust cloud initially decreases to a minimum but rises with further increases in the initial powder injection pressure. When the ...
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