Results 41 to 50 of about 5,273,755 (149)

Geochemistry and risk assessment of street dust in Luanda, Angola, a tropical urban environment [PDF]

, 2005
A total of 92 samples of street dust were collected in Luanda, Angola, were sieved below 100 μm, and analysed by ICP-MS for 35 elements after an aqua-regia digestion.
Miguel García, Eduardo de, Ferreira Baptista, Lopes   +1 more
core   +1 more source

Study on the effect of humidity on coal mine dust concentration monitoring and its compensation strategy

Gong-kuang zidonghua
The humidity in mines significantly affects the monitoring quality of coal mine dust concentration. This study aims to improve the precision of dust concentration monitoring in high-humidity underground coal mine conditions, through investigating the ...
ZHANG Anran
doaj   +1 more source

High-speed online detection system of coal dust concentration based on hardware acceleration

Meikuang Anquan, 2023
A high speed on-line measuring device for coal dust concentration based on Mie scattering theory equation was designed by using Xilinx ZYNQ-7010 chip.
Fengyuan ZHANG, Yemin ZHANG, Guibin YAO
doaj   +1 more source

Effect of particle size of coal dust on explosion pressure

Journal of Measurement Science and Instrumentation, 2019
The effect of the particle size of coal dust on explosion pressure and the rising rate of explosion pressure is studied. Three coal dusts from Lingan Coal Mine in Canada and Datong Coal Mine in China are selected to test.
JIAO Feng-yuan, ZHANG Hua-rong, CAO Wei-guo, FANG Fan   +3 more
doaj  

Additives to Coal-Based Fuel Pellets for the Intensification of Combustion and Reduction in Anthropogenic Gas Emissions

Applied Sciences, 2020
Cylinder-shaped fuel pellets that were 3 mm in diameter and 3 mm in height, with a mass of 20 mg, were produced by compressing dry coal processing waste under the pressure of 5 MPa. The first group of pellets from coal dust with a particle size less than
Dmitriy Klepikov, Tereza Kudelova, Kristina Paushkina, Pavel Strizhak   +3 more
doaj   +1 more source

Prediction of coal dust particle size after spraying dust reduction in roadway based on orthogonal experiment and regression analysis

Meitan kexue jishu
In order to investigate the main factors affecting the effect of spray dust reduction on the particle size of coal dust after spray dust reduction, a quantitative mathematical model was obtained to characterize the quantitative relationship between the ...
Bingyou JIANG, Yuqian ZHANG, Changfei YU, Ben JI, Haoyu WANG, Zhuang LIU   +5 more
doaj   +1 more source

Study on distribution law of coal dust concentration-particle size in fully mechanized mining face of Shoushan No.1 Mine

, 2023
In order to solve the problems of serious dust pollution and difficult dust removal in fully mechanized coal mining face, we conduct research on the concentration and particle size field of dust in the fully mechanized mining face of Shoushan No.1 Mine ...
LI Xinlong, YANG Yang, HU Yating
core   +1 more source

Study on flame fractal characteristics of coal dust explosion at the decompression position of Hartmann tube

Scientific Reports
The explosion of coal dust is powerful and has a wide range of spread, which can easily cause mass death and injury. In this paper, the flame microstructure and propagation characteristics of coal dust explosion are recorded by high-speed photography ...
Zemiao Yang, Ke Gao, Yinhui Wang
doaj   +1 more source

Research on the influencing factors of collision and infiltration of fine coal dust by magnetized charged droplets

Meikuang Anquan
Magnetized charging technology, as a new type of coupling enhanced dust reduction technology, can effectively improve the poor efficiency of traditional wet water mist in capturing fine and difficult to infiltrate coal dust. This study adopts theoretical
Hongjie ZHANG, Yuming ZHAO, Jiezhong WU, Shaocheng GE   +3 more
doaj   +1 more source

Chemical composition of ambient aerosol, ice residues and cloud droplet residues in mixed-phase clouds: single particle analysis during the Cloud and Aerosol Characterization Experiment (CLACE 6) [PDF]

, 2009
Two different single particle mass spectrometers were operated in parallel at the Swiss High Alpine Research Station Jungfraujoch (JFJ, 3580 m a.s.l.) during the Cloud and Aerosol Characterization Experiment (CLACE 6) in February and March 2007.
Cziczo, Daniel J., Curtius, Joachim, F. Drewnick, Cziczo, D.J., Klimach, Thomas, S. Borrmann, Kamphus, M., D. J. Cziczo, Keller, Livia, M. Kamphus, Drewnick, Frank, Mertes, Stephan, Borrmann, Stephan, Curtius, J., Ettner-Mahl, Matthias, Keller, L., Mertes, S., J. Curtius, Ettner-Mahl, M., Klimach, T., Borrmann, S., Kamphus, Michael, L. Keller, M. Ettner-Mahl, Drewnick, F., S. Mertes, T. Klimach   +26 more
core   +2 more sources