Dust explosions are the result of the rapid combustion of flammable mixtures, such as those found in dust clouds in the working environment mixed with ambient air. If this mixture with an ignition source, such as fire and dust particles has gathered in groups large enough to maintain a stable flame, the dust cloud becomes flammable.
Studies show that 70% of all powders are flammable due to the size and density of the particles, which allows them to maintain a flame long enough to burn. When the dust particles move freely and are hot enough, fire is created which burns momentarily. You can now easily look for the finest dust explosion protection equipment via https://www.euratex.co.uk/dust-classification/.
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However, if the dust particles are concentrated in a small area, such as: ventilation holes or engine inlets, this causes an explosion and can lead to the complete destruction of the engine and even the building. Because it takes sufficient time to collect dust and cause an explosion, proper precautions and precautions can reduce the chance of an explosion.
What's so special about a dust explosion?
The main causes of dust explosions are friction and mechanical damage. In contrast to gases or solvents, dust particles pose a greater risk to workshops and work safety. While gaseous and solvent particles are dispersed in air and can fall below the flammability limit, dust particles are heavier than air and therefore fall on surfaces up to a strong enough stream of airlifts it back into the air and can regroup there with other dust particles.
If sufficiently large particles are collected and combustion conditions are met, an explosion may occur. Therefore, finer particles pose a greater hazard, as larger particles are less likely to return to free-flowing air, while smaller particles are much lighter and therefore easier to transport.