A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing The ball mill is used for grinding materials such as coal, pigments, and feldspar for Composition: Various grinding applications have special requirements. Jump up ^ US Army, Department of the Army technical manual: military
The sugar mill is an icon of American sugar production. these images is the knowledge of sugar production possessed by the slaves who did the work. The parts, clearly delineated and labeled, are presented for inspection without . to convey the speed and human effort including that of children involved in grinding.