Results 151 to 160 of about 4,692 (194)

Coal dust particle size survey of US mines

Journal of Loss Prevention in the Process Industries, 2007
Abstract The National Institute for Occupational Safety and Health (NIOSH) and the Mine Safety and Health Administration (MSHA) conducted a joint survey to determine the range of coal particle sizes found in dust samples collected from intake airways of US coal mines. The last comprehensive survey of this type was performed in the 1920s.
Michael J. Sapko, Kenneth L. Cashdollar, Gregory M. Green   +2 more
exaly   +2 more sources

Experimental research of particle size and size dispersity on the explosibility characteristics of coal dust

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, Yuannan Zheng
exaly   +2 more sources

Effects of particle size, dust concentration and dust-dispersion-air pressure on rock dust inertant requirement for coal dust explosion suppression in underground coal mines

Chemical Engineering Research and Design, 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.
Devi Prasad Mishra, Sikandar Azam
exaly   +2 more sources

The influence of high-voltage and coal dust particle size distribution on dust collecting efficiency

2010 2nd International Conference on Industrial and Information Systems, 2010
The working efficiency of electrostatic precipitator can be affected by many factors, and the dust particle size is one of the important factors. The coal dust is used to subject investigated in this test, Dust particle size distribution is tested through experiment combining the theories foundation of the dust particle charge, and the relation between
null Zi-sheng Zhang, null Qiang Liu, null Zhen-lei Xiao, null Bo Zhang, null Zhen-ya Yang, null Zhi-qiang Liu, null Qing Li   +6 more
exaly   +2 more sources

Study on explosion suppression of coal dust with different particle size by shell powder and NaHCO3

Fuel, 2021
Abstract 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.
Yaqing Zhang
exaly   +2 more sources

Effects of particle size on the self-ignition behaviour of a coal dust layer on a hot plate

Fuel, 2020
Abstract 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 ...
Chi-Min Shu, Bei Li, Mingshu Bi
exaly   +2 more sources

Effect of water–fog particle size on dust fall efficiency of mechanized excavation face in coal mines

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 ...
Min Mu, Bingyou Jiang, Wenjun Zhu
exaly   +2 more sources

A Novel Coal Dust Characteristic Extraction to Enable Particle Size Analysis

IEEE Transactions on Instrumentation and Measurement, 2021
Coal particle characteristic extraction is essential to prevent dust explosions. It is traditionally analyzed by manual screening, which is relatively time-consuming and cannot automatically capture outlining. To address this issue, an accurate and automatic particle image segmentation method is highly demanded in the smart mine.
Zheng Wang 0051, Dongyan Li, Xu Zheng, Dingding Xie   +3 more
openaire   +1 more source

Influence of particle size distribution on coal dust explosion sensitivity

Powder Technology
Chenzi Teng
exaly   +2 more sources

Size Distribution Measurement of Airborne Coal Dust by Optical Particle Counters

American Industrial Hygiene Association Journal, 1974
An 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, V A, Marple, K T, Whitby, N J, Barsic   +3 more
openaire   +2 more sources