Combustible dust can trigger severe explosions
Perhaps the most serious hazard is the potential for secondary explosions, which occur when building vibrations or gases produced by a smaller explosion disperse dust on surfaces into the air. The dispersed dust cloud is subsequently ignited by the advancing flame front of the initial explosion or by other ignition sources.
Secondary explosions can be devastating because they tend to bring large amounts of dust into involvement. Three recent dust explosions are briefly described below: