A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes. There are many different types of mills and many types of materials processed in them. Historically mills were powered by hand (e.g., via a hand crank), working .. SAG mills are autogenous mills but use grinding balls like a ball mill.
A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing . The grinding media is the balls, which may be made of steel (chrome steel), stainless steel, ceramic, or rubber. . A ball mill, a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic.