Dust can explode at high concentrations!! 8. Dust Explosions Dust can explode at high concentrations!! Coal dust explosion at Bruceton, Pennsylvania, experimental mine.

Dust explosion can occur when: 1. Dust concentration is appropriate; 20-200 g/m3. 2. Oxygen concentration is appropriate. 3. Ignition source is present. 4. Space is enclosed. Explosive aerosol materials: 1. All organic materials 2. Some inorganic compounds 3. Some metals

high dust concentration Dust explosion process Small explosion resuspension of dust high dust concentration large explosion series of explosion

Explosive limits Range of explosive concentrations for methane and brown coal dust in air.

Explosive characteristics of some dusts

Pressure rise index: measure of explosive violence It is a constant for a given dust material, particle size distribution, and moisture content. is camber volume in m3. Minimum explosive concentration depends on: 1. Particle size 2. Particle material

Effect of particle size on the minimum explosive concentration.

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