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

2. Dust explosion can occur when:
1. Dust concentration is appropriate; 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

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

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

5. Explosive characteristics of some dusts

6. 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

7. Effect of particle size on the minimum explosive concentration.

8. END