Pin Grinding Mills

Pin mills have a vertical shaft impellor fitted with pins. The mill body is filled with spherical media, typically steel or ceramic, in the size range of 3 to 12 mm. Pebble or autogenous media can also be used. These mills are capable of operating either wet or dry. The preferred feed size is <300 Pm, and sub-10-Pm grinds are achievable. Relatively high impeller speeds often result in wear issues with these mills, and they are most suitable for nonabrasive feeds.