Browse > Article
http://dx.doi.org/10.7842/kigas.2013.17.4.33

Effect of Mean Diameter on the Explosion Characteristic of Magnesium Dusts  

Han, Ou-Sup (Occupational Safety & Health Research Institute, KOSHA)
Lee, Su-Hee (Occupational Safety & Health Research Institute, KOSHA)
Publication Information
Journal of the Korean Institute of Gas / v.17, no.4, 2013 , pp. 33-38 More about this Journal
Abstract
A study was carried out on the effect of particle size (mean diameter) on magnesium dust explosion. Experimental investigations were conducted in a 20-L explosion sphere, using 10 kJ chemical ignitors. Explosion tests were performed with three different dusts having mean diameter (38, 142, $567{\mu}m$) and the dust concentrations were up to $2250g/m^3$. The lower explosion limits(LEL) of magnesium dusts were about $30g/m^3$ at $38{\mu}m$ and $40g/m^3$ at $142{\mu}m$. LEL tended to increase with particle size and this means that the explosion probability of magnesium dust decreased with increase of particle size. The maximum explosion presssure ($P_m$) and $K_{st}$ (Explosion index) decreased with the increase of particle size. For magnesium powder of $567{\mu}m$, however, the explosive properties were not observed in the 5 kJ ignition energy.
Keywords
magnesium particles; dust explosion; explosion pressure; rate of pressure rise;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Han, O.S., Lee, K.W., Properties of Explosion and Flame Velocity with Content Ratio in Mg- Al Alloy Particles, KIGAS, 16(4), 32-37 (2012)   과학기술학회마을   DOI   ScienceOn
2 Han, O.S., Lee, K.W., Influence of the Magnesium Content on the Explosion Properties of Mg-Al Alloy Dusts, KIGAS, 16(6), 1-6 (2012)   과학기술학회마을   DOI   ScienceOn
3 ASTM E1226, Standard Test Method for Pressure and Rate of Pressure Rise for Combustible Dusts, The American Socirty for Testing and Materials, (1988)
4 Dreizin, E. L., & Hoffmann, V. K., Experiments on Magnesium Aerosol Combustion in Microgravity. Combustion and Flame, 122(1-2), 20-29 (2000)   DOI   ScienceOn
5 Dreizin, E. L., & Shoshin, Y., Particle Combustion Rates in Premixed Flames of Polydisperse Metal-air Aerosols. Combustion and Flame, 133, 275-287 (2003)   DOI   ScienceOn
6 Vilyunov, V.N. and Zarko, V.E., Ignition of Solids, Studies in Physical and Theoretical Chemistry, No.60, 329-345 (1989)
7 Li, G., Yuan, C. M., Zhang, P.H., Chen, B.Z., Experiment-based Fire and Explosion Risk Analysis for Powdered Magnesium Production Methods, Journal of Loss Prevention in the Process Industries 21, 461-465 (2008)   DOI   ScienceOn
8 Dreizin, E. L., Berman, C. H., & Vicenzi, E. P., Condensed-phase Modifications in Magnesium Particle Combustion in Air, Combustion and Flame, 122(1-2), 30-42, (2000)   DOI   ScienceOn
9 Kuai, N. S., Li, J. M., & Chen, Z., Study on the Risk Control of Magnesium Dust Explosion Based on Inherent Safety Principle, Fire Science and Technology, 29(5), 369-372 (2010)
10 Han, O.S. et al., Study on Ignition Hazards of Suspended Metal Fine Particles, Occupational Safety & Health Research Institute, KOSHA, 2012-OSHIRI-920, 5-19, (2012)
11 Matsuda, T., Yashima, M., Nifuku, M., & Enomoto, H. , Some Aspects in Testing and Assessment of Metal Dust Explosions. Journal of Loss Prevention in the Process Industries, 14(6), 449-453 (2001)   DOI   ScienceOn
12 Nifuku, M., Koyanaka, S., Ohya, H., Barre, C., Hatori, M., Fujiwara, S., Ignitability Characteristics of Aluminium and Magnesium Dusts that are generated During the shredding of Postconsumer Wastes. Journal of Loss Prevention in the Process Industries, 20(4-6), 322-329 (2007)   DOI   ScienceOn
13 Li, G., Yuan, C. M., Fu, Y., Zhong, Y. P., & Chen, B. Z., Inerting of Magnesium Dust cloud with Ar, N2 and CO2. Journal of Hazardous Materials, 170(1), (2009)