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Lab demonstration with burning lycopodium powder. A dust explosion is the rapid combustion of fine particles suspended in the air within an enclosed location. Dust explosions can occur where any dispersed powdered combustible material is present in high-enough concentrations in the atmosphere or other oxidizing gaseous medium, such as pure oxygen.
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English: Top, Beginning stage of a propagating coal dust explosion. Middle, The flame front appears behind the shock wave. Bottom, The cycle continues with the shock wave lifting coal dust and the lagging flame front igniting and propagating the explosion.
Lycopodium powder is also sometimes used as a lubricating dust on skin-contacting latex (natural rubber) goods, such as condoms and medical gloves. [4]In physics experiments and demonstrations, lycopodium powder can be used to make sound waves in air visible for observation and measurement, and to make a pattern of electrostatic charge visible.
The control of coal dust is difficult due to the coal dust being such a fine particle, allowing it to escape and be suspended in the air for a large amount of time. [3] Dust explosion pentagon showing the needed elements for an explosion: Oxygen, Combustible dust, Dispersion of dust, Confinement of dust, and an Ignition Source.
Class action suit in 2021 chemical plant explosion in Rockton entering final stages. Gannett. Jeff Kolkey, Rockford Register Star. September 27, 2024 at 5:12 AM. ... dust and debris.
Flash fires may occur in environments where fuel, typically flammable gas or dust, is mixed with air in concentrations suitable for combustion. In a flash fire, the flame spreads at subsonic velocity, so the overpressure damage is usually negligible and the bulk of the damage comes from the thermal radiation and secondary fires.
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