Coal Mills in Thermal Power Plant | PDF | Mill (Grinding ...
grind the coal with steel balls in a rotating horizontal cylinder. If the length of the cylinder is greater than the diameter of the cylinder, it is called a tube mill. fTUBE MILL These are slow speed Mills. The Mills are designated as BBD-4772 Where, B Broyer (Name of inventor). B Boulet (French word for Balls). D Direct firing.
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