Centrifugal grinding mills
First Claim
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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.
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Abstract
The present invention relates to a centrifugal grinding mill comprising a vertical axis of revolution (1), a nutating axis (2) intersecting axis (1) at a point of nutation symmetry (3), a grinding chamber (4) symmetrical about axis (2) connecting with feed passage (5) at its upper end and having discharge openings (6) of a screening element (26) located within a plane area aligned normal to, symmetrical with, and intersected by the axis (2), and adjacent the plane containing the maximum diameter of the grinding chamber (4).
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Citations
23 Claims
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1. A centrifugal grinding mill comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A centrifugal grinding mill comprising:
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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 ground product flows through of the screening element, and discharges from the grinding chamber through a tubular passage which passes through the feed passage adjacent the point of nutation symmetry. - View Dependent Claims (20, 21, 22, 23)
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Specification