1. Areas of activity and frequency of explosions
Suspended dusts, made up of oxidizable materials suspended in the air, can form flammable mixtures. Their ignition in a confined environment – an enclosure, an appliance –, can constitute a dust explosion accompanied by a pressure effect.
In this phenomenon of explosive combustion, the fuel is oxidizable organic or mineral dust, and the oxidizer is the oxygen in the air.
It is conceivable that oxidizing gases other than air or oxygen + nitrogen mixtures could contribute to dust explosions, but these are very rare circumstances, and no precise examples are known.
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Dust explosions affect a wide range of industrial activities, since flammable dusts come from a wide variety of sources. There's no need to go into more detail on the industrial activities...
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Areas of activity and frequency of explosions
Different priming sources
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