KONTINUERLIGT ARBETANDE OMRORAREKULKVARN FOR KROSSNING AV SMA PARTIKLAR

摘要

An agitator ball mill including an annular stator assembly and a co-axially mounted rotor is disclosed. A first annular member is mounted on the stator and a second annular member is mounted on the rotor shaft. The position of the second annular member along the shaft is determined by a demountable spacer member to provide coarse adjustment of the width of a gap defined between mutually facing axial surfaces of the first and second annular members. Coolant is applied to the stator to cause controllable axial contraction of the stator relative to the shaft. This relative contraction increases the width of the gap and thus provides a fine adjustment of the width, so as to prevent grinding bodies from passing through it, whilst permitting material ground in the mill by the bodies to pass through the gap and thereby become separated from the grinding bodies.