Results 11 to 20 of about 5,148 (219)
Explosion Characteristics and variation of oxidized coal dust
Meikuang Anquan, 2023 Oxidized coal is a coal body that has undergone the process of warming up and cooling down, and has been widely used in mine fire area start-up, stratified mining, and re-mining of residual coal, etc.
HE Jie, CHENG Kai, ZHANG Jin
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Effects of particle size distribution on the explosion severity of coal dust
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019 The effects of particle size distribution (PSD) on coal dust explosion severity were investigated using a 20 L vessel. The severity was evaluated by the maximum explosion pressure (Pex), the maximum rate of pressure rise ((dP/dt)ex), and the time spans (t1, t2) between ignition and Pex and between ignition and (dP/dt)ex during a trial. These parameters
Jiangshi Zhang +3 more
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Analysis of combustion duration and residual gas in secondary explosion of coal dust
Gong-kuang zidonghua, 2018 Secondary explosion experiments of coal dust were carried out by use of 20 L spherical explosion device under the conditions of different coal dust concentration, particle size and ignition energy separately, and influence of coal dust concentration ...
LI Xiaoliang +4 more
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Increasing Spontaneous Combustion Risk While Reducing the Coal Particle Size [PDF]
E3S Web of Conferences, 2019 Extraction, storage and transportation of coal are complicated by the danger of spontaneous combustion centers due to toxic gases emission. At various technological processes, the formation of clusters consisting of coal particles of various sizes is ...
Portola Vyacheslav +4 more
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Effects of Spray Surfactant and Particle Charge on Respirable Coal Dust Capture
Safety and Health at Work, 2017 Background: Surfactant-containing water sprays are commonly used in coal mines to collect dust. This study investigates the dust collection performance of different surfactant types for a range of coal dust particle sizes and charges. Methods: Bituminous
Mei W. Tessum, Peter C. Raynor
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The dependence of particle size on cell toxicity for modern mining dust
Scientific Reports, 2023 Progressive massive pulmonary fibrosis among coal miners has unexpectedly increased. It would likely due to the greater generation of smaller rock and coal particles produced by powerful equipment used in modern mines.
Yi-Hsuan Chen +7 more
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Research on secondary explosion characteristic of coal dust
Gong-kuang zidonghua, 2018 Influence of concentration, particle size and ignition energy of coal dust on secondary explosion characteristic of coal dust were studied by use of 20 L spherical explosion device, and the secondary explosion characteristic of coal dust was compared ...
LIU Haoxiong +5 more
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Rudarsko-geološko-naftni zbornik, 2019 This study investigates the effect of variations of coal dust particles size on the rate of burning of coal dust particles in a 2-liter closed chamber. Coal dust was selected from three different mines with different sizes (149μm, 125μm, 105μm, 74μm, 63μm, 53μm, 44μm, 37μm) for explosion testing in a closed chamber of 2-liters.
Hadis Moradi +3 more
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Prediction of heterogeneous nucleation condensation effect on the surface of respiratory coal dust and test of dust reduction test [PDF]
Meitan xuebaoSurface wettability of coal dust particles is an important factor restricting the efficiency of wet dust removal. Heterogeneous nucleation condensation on the surface of coal dust particles is a means without any pollution, without considering the ...
Hanyi LIN +5 more
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ProcessesCoal dust particles adhering to a camera lens reduce its light transmittance, which deteriorates the performance of the camera and may lead to serious problems with mining equipment that requires visual ability. Aiming at improving coal dust removal and cleaning technologies, the adhesion behavior of coal dust with fused silica is studied here ...
Shujun Zhou, Yue Yang, Hongfei Shang
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