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Coal dust
From Wikipedia, the free encyclopedia
Coal dust is a fine powdered form of coal. Because of the brittle nature of coal, coal dust can be created during mining, transportation, or by mechanically handling coal.
Coal dust suspended in air is explosive. Coal dust has far more surface area per unit weight than chunks of coal, and is more susceptible to spontaneous combustion. As a result, a nearly empty coal store is a greater explosion risk than a full one. The Luisenthal Mine Disaster and the explosion at Benxihu Colliery are two examples of this type of explosion caused by coal dust.
Coal workers' Pneumoconiosis, or black lung disease, is caused by inhaling coal dust, typically dust produced in coal mining.
For use in thermal power plants, coal is ground into dust using a device called a powdered coal mill [1]. The resulting product, called powdered coal or pulverized coal, is then generally used in a fossil fuel power plant for electricity generation.