Ball mill is mainly used for grinding in mining metallic minerals and non-metallic minerals, cement, refractories, chemical, power plant, aluminum, building material, glass, ceramic, steel slag and fly ash, ect follows more crushing and less grinding principle to save energy. the feed size to ball mill shall be smaller than 00mm, the output ... Read More Virtual Tour of the MSU Power Plant 0000-00-00 Ball Mills. The power plant has two types of mills: ball mills and attrition mills. A ball mill uses steel balls about the size of bowling balls that run in a race (another name for a track) and crush any coal that is in their way! Here are some photos: Balls - These are solid steel balls Read More 