Results 141 to 150 of about 39,493 (184)
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Powder Technology, 2016
Abstract In the present research work, the effects of particle size (D 50 ) and size dispersity (σ D ) on the explosion severity of coal dust were investigated using a 20 L spherical explosion vessel. Coal dust samples with similar median diameter (D 50 ) and different size dispersity (σ D ) and similar size dispersity (σ D ) and different size ...
Qingzhao Li +5 more
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Abstract In the present research work, the effects of particle size (D 50 ) and size dispersity (σ D ) on the explosion severity of coal dust were investigated using a 20 L spherical explosion vessel. Coal dust samples with similar median diameter (D 50 ) and different size dispersity (σ D ) and similar size dispersity (σ D ) and different size ...
Qingzhao Li +5 more
openaire +3 more sources
Process Safety and Environmental Protection, 2019
Abstract Coal dust explosion constitutes an ever-present hazard in underground coal mines worldwide. This study examines the effects of important parameters, such as, dust particle size, dust concentration and dust-dispersion-air pressure on rock dust inertant requirement for suppressing coal dust explosion using a Godbert-Greenwald (GG) furnace.
Sikandar Azam, Devi Prasad Mishra
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Abstract Coal dust explosion constitutes an ever-present hazard in underground coal mines worldwide. This study examines the effects of important parameters, such as, dust particle size, dust concentration and dust-dispersion-air pressure on rock dust inertant requirement for suppressing coal dust explosion using a Godbert-Greenwald (GG) furnace.
Sikandar Azam, Devi Prasad Mishra
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Study on explosion suppression of coal dust with different particle size by shell powder and NaHCO3
Fuel, 2021Abstract In order to improve the pertinence of coal dust explosion suppression technology, a 20 L spherical explosion characteristic test system and a dust minimum ignition energy test device were used to study the suppression differences of different particle sizes of coal dust with inert and active explosion suppressants.
Xiangrui Wei +5 more
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Journal of Cleaner Production, 2020
Abstract Respiratory dust and dust fall from the mechanized excavation faces of coal mines are crucial issues that require immediate attention. The dust fall technique for two-phase gas–water spraying is effective in solving these issues. We designed a spray dust fall simulated experimental system to test the dust fall efficiency for six grain sizes ...
Xueming Fang +8 more
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Abstract Respiratory dust and dust fall from the mechanized excavation faces of coal mines are crucial issues that require immediate attention. The dust fall technique for two-phase gas–water spraying is effective in solving these issues. We designed a spray dust fall simulated experimental system to test the dust fall efficiency for six grain sizes ...
Xueming Fang +8 more
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Effects of particle size on the self-ignition behaviour of a coal dust layer on a hot plate
Fuel, 2020Abstract Knowing the sizes of coal particles is vital for understanding the real ignition behaviour of coal dust deposits on a hot plate. Furthermore, such knowledge facilitates model construction for assessing industrial coal dust explosion risk. Three particle sizes (0.10–0.15, 0.15–0.20, and 0.20–0.30 mm) of coal samples were selected to analyse ...
Bei Li +6 more
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Influence of particle size distribution on coal dust explosion sensitivity
Powder TechnologyXiaofeng Ren +5 more
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Size Distribution Measurement of Airborne Coal Dust by Optical Particle Counters
American Industrial Hygiene Association Journal, 1974An optical particle counter has been calibrated for size distribution measurement of airborne coal dust particles. A differential electrical mobility analyzer was used with a fluidized bed dust feeder to produce uniform coal dust particles of a known size for calibration for particles
B Y, Liu +3 more
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Variability of Particle Size-Specific Fractions of Personal Coal Mine Dust Exposures
AIHAJ, 1995This study estimated the ratio of the tracheo-bronchial dust fraction to the fraction collected by a respirable dust sampler for a variety of job classifications found in conventional, continuous, and longwall coal mining sections. The ratios could then be applied in epidemiologic studies to existing respirable dust measurements to estimate thoracic ...
N S, Seixas +3 more
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Journal of Hazardous Materials, 2021
Chemical and physical properties of coal dust particles significantly influence the inhalation of respirable coal dust by miners, causing several lung diseases such as coal workers' pneumoconiosis (CWP) and silicosis. Multiple experimental techniques, including proximate/ultimate analyses, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS),
Rui Zhang, Shimin Liu, Siyang Zheng
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Chemical and physical properties of coal dust particles significantly influence the inhalation of respirable coal dust by miners, causing several lung diseases such as coal workers' pneumoconiosis (CWP) and silicosis. Multiple experimental techniques, including proximate/ultimate analyses, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS),
Rui Zhang, Shimin Liu, Siyang Zheng
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