Related to grinding mills

A mill for grinding granular material comprising:

• a grinding surface;
• a generally conical grinding member having a hollow therein;
• a mounting arrangement for supporting the generally conical grinding member in such a manner that the grinding member can be precessed around the grinding surface, the mounting arrangement including feed means for introducing the granular material into the hollow of the grinding member,
• in which the apex of the generally conical grinding member is cut away to produce a hole through the grinding member connecting to the hollow therein,
• in which the grinding surface is provided with an upstanding pip positioned centrally,in which the mounting arrangement for supporting the generally conical grinding member comprises means for locating the generally conical grinding member in a defined position relative to the grinding surface in such a manner that the upstanding pip co-operates with the hole through the apex of the generally conical grinding member in such a manner as to partially block gthe hole and prevent the passge of the granular material through a first portion of the hole whilst allowing passage of the granular material through a second portion of the hole,
• in which the granular material passing through the second portion of the hole is deflected by the upstanding pip on the grinding surface outwardly from the centre of the grinding surface to thereby be positioned on the grinding surface at a distance from the centre such that the generally conical grinding member crushes the granular material in its precessive motion around the grinding surface.