Rotary ball mill with milling track - having balls mounted on spokes radiating from rotor and a cooled milling track

Mill has spherical milling elements for milling coal, minerals and ores. The milling balls are contained inside a milling track. They are held by radial spokes fixed to the central rotor. The outer track is formed from two quarter spherical sections each with a cooling channel and having a passage between them. The balls are forced against this track by the centrifugal action. The track is spring loaded and this gives an additional milling action. An inner ring is attached to the rotor and this is formed from a series of segments, also with a quarter spherical profile. Used in fine grinding of coal, rocks and minerals. The mill avoids high axial forces on the drive, avoids contact between the balls and has a simple cooling system for the milling track.