Vertical mill
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United States of America Patent
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Jan 11, 2011
Issued Date -
N/A
app pub date -
Feb 28, 2006
filing date -
Mar 3, 2005
priority date (Note) -
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Abstract
The invention relates to a vertical mill comprising a grinding track (1) and at least one grinding roller (2). The grinding track (1) is provided with a central zone (Ia) made of a harder material and two laterally adjacent edge zones (Ib, Ic) made of a softer material. The width (a) of the central zone (Ia) is smaller than or equal to the width of the grinding roller (2).
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