Horizontal, detachable, ball mill

A mill comprising a shaft mounted in a pair of bearings located at one end of the shaft, and a wall having an opening through which the shaft extends, wherein the improvement comprises a horizontal-flow container for the charge, which is removably mounted at one end in cantilever fashion upon one side of said wall and has a screened outlet at its other end, a tubular inlet housing which is mounted on the other side of said wall, surrounding a portion of the shaft between said wall and said bearings, and which has a seal through which the shaft enters the inlet housing, a feed screw mounted on said portion of the shaft, another portion of the shaft, extending within the container, being of greater diameter than said opening and being closely spaced from said wall to provide a narrow gap through which material passes from the inlet housing into the container, the shaft being hollow and having means for circulating a cooling fluid therethrough, and a shroud for holding a cooling fluid in contact with the exterior of said seal.