· NEW DELHI: The environment ministry has decided that it will no longer regulate the ashcontent of coal used by thermal power plants. On Thursday, the ministry issued a notifiion that overturned its January 2014 regulation that made it mandatory for all coalbased power plants loed 500 kilometres or more from the pithead or coal mine to use raw or .
· Coal is transported to bowl mills by coal feeders. 3. Bowl Mill The coal is pulverized in the bowl mill, where it is grounded to a powder form. The mill consists of a round metallic table on which coal particles fall. This table is rotated with the help of a motor. There are three large steel rollers, which are spaced 120" apart.