Vertical Ball Mill Mill Power Hardgrove

Mill for hgi coal rindability for vertical mills - grindability for vertical millsardgrove index for thermal coal sand washing machinevertical coal mill power the hardgrove grindability index acarp- mill for hgi 35 coal indicates that a mill using this coal will have a high output while a low -grindability for vertical mills-,what do we mean by grindability of vertical roller millcement.