Coal washing. Coal that comes from a mine is a complex mixture of materials with a large variety of physical properties. In addition to the coal itself, pieces of rock, sand, and various minerals are contained in the mixture. Thus, before coal can be sold to consumers, it must be cleaned.
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Get PriceThe fine coal dust is much more combustible than large lumps ofcoal. Large lumps of coal takes time for the flames to beginburning it efficiently so heat takes longer to bui . ld up in thefurnace.
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