Patent ID: 7070134
Filing Date: 2006-07-04
Classification: B02C

Abstract:
1. A centrifugal grinding mill comprising: a grinding chamber having a longitudinal axis of symmetry, the grinding chamber being constrained and adapted to permit nutating motion of the axis of symmetry about a relatively stationary axis of the grinding mill, said axes intersecting at a point of nutation symmetry; a support member on which the grinding chamber is supported; a feed passage in communication with and directed towards the grinding chamber; driving means operatively coupled to the grinding chamber, and designed to drive the grinding chamber to effect the nutating motion; and a screening element located internally of the grinding chamber and being configured to permit particles of ground product to discharge from the chamber, wherein the screening element includes a screening surface oriented substantially normal to the longitudinal axis of the grinding chamber wherein ground product is discharged from the chamber in a generally axial direction.