Ignition Temperature and Residence Time of Suspended Magnesium Particles

Han, Ou-Sup

doi:10.7842/kigas.2015.19.3.25

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Fig 1 Particle Distributions Of Mg Sample Dusts1

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“…최근 금속분진에 의한 화재폭발사고의 발생빈 도를 보면 Mg에 의한 폭발사고가 반복적으로 발생 하고 있는데 [1], Mg의 분진폭발사고 저감을 위해서 는 안전대책 강구에 필요한 폭발특성값 등의 정량적 인 안전성 자료가 우선적으로 필요하다.…”

Section: Fig 1 Particle Distributions Of Mg Sample Dustsunclassified

Effect of Mean Diameter on the Explosion Characteristic of Magnesium Dusts

Han¹,

Lee²

2013

Journal of the Korean Institute of Gas

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-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 μm) and the dust concentrations were up to 2250 g/m 3 . The lower explosion limits(LEL) of magnesium dusts were about 30 g/m 3 at 38 μm and 40 g/m 3 at 142 μm. 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 (Pm) and Kst (Explosion index) decreased with the increase of particle size. For magnesium powder of 567 μm, however, the explosive properties were not observed in the 5 kJ ignition energy.

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Section: Fig 1 Particle Distributions Of Mg Sample Dustsunclassified