Method and apparatus for fine comminution of granular mill feed material
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United States of America Patent
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Oct 5, 1999
Grant Date -
N/A
app pub date -
Sep 17, 1997
filing date -
Apr 6, 1995
priority date (Note) -
Expired
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Abstract
A method and apparatus for comminuting granular mill feed material wherein the material is delivered in a stream to a gap between two rotary grinding tracks which confront one another, one of which is positioned at a small angle to the other so that in response to relative rotation of such tracks the width of the gap decreases to a minimum at an initial rate of at least 1 m/s. At the minimum width of the gap the material is subjected to comminuting pressure greater than 50 MPa.
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