coal level measurement of ball and tube mills in power plant
Firing Western SubBituminous Coal at Interstate Power. three double ended Ball Tube Mill Systems The Ball Tube Mill Systems which provide pulverized coal for firing are located on the hot side of the trisector air heaters Each Ball Tube Mill is 111/2 ft dia x 16 ft long, and each is driven at 1716 rpm by a 1250 hp motor through appropriate reduction gearing.