Ade Mills | PDF | Mill (Grinding) | Boiler Scribd
carried to a certain height and allowed to fall The coal is crushed due to (i)impact of the balls on coal particles,(ii)attrition as the particles slide over each other and also over liners BALL TUBE MILL Ball tube mills are represented by BBD BBD : Boyer Ball Direct Types : BBD 4760 BBD 4772 I. BBD 4760 Mill : Shell dia : Shell length ...