Enhanced ore comminution process and apparatus
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United States of America Patent
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Mar 11, 2008
Grant Date -
Nov 17, 2005
app pub date -
May 28, 2003
filing date -
May 29, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for comminuting particulate material by inter-particle comminution in a bed of particles are disclosed. The apparatus includes a vertical roller mill with a horizontal grinding table rotating about a verticle mill axis. At least one grinding roller presses resiliently against a bed of particulate material on the grinding track and applies a compressive force. The geometry of the mill is such that the roller engages the bed of particulate material with a substantially pure rolling action. This minimises shear forces applied to the particle bed and minimises the reduction of fines.
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