Ball mill with discharge opening - has closure plate flush with mill container inner surface covering discharge perforations

摘要

The ball mill container (1) wall (11) is fitted with discharge (6), which has a cylindrical annular housing (10) welded into a container aperture. The inner surface of the housing is flush with the inner wall of the container. In the housing is axially slidable a cage-like sealing element (12). The sealing element has on its inside a closing plate (14), which in closed position is flush with the inner surface of the container. This closing plate cooperates with a sealing ring (15). The sliding of the closing plate exposes perforation in the discharge device of such size as to prevent the mill balls to escape.