Coal Ball Mill Level Measurement hansestadt-demmin.de. BinQ Mining Equipment ball mill free hight formula Ball Mill Free Height . ball mill crushed coal coal ball rolling mill level measurement coal. gt gt Chat online Cement mill Wikipedia A cement mill is the equipment used to grind the hard nodular clinker from the .As ball mills to crush the charcoal and sulfur. A ball mill is basically a large rotating drum filled with charcoal, sulfur and a crushing agent, such as lead balls or heavy stones. The mill is rotated at high speed for up to 48 hours or longer. The result is a very finely powdered charcoal sulfur mixture.