List of types of mill Wikipedia
Industrial tools for size reduction and/or filtration (See comminution, filtration) . Arrastra, simple mill for grinding and pulverizing (typically) gold or silver ore; Ball mill, a mill using balls to crush the material; Bead mill a type of Mill (grinding); Burr mill or burr grinder, a mill using burrs to crush the material, usually manufactured for a single purpose such as coffee beans