Method and vertical mill for grinding material to be ground
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United States of America Patent
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May 9, 2017
Grant Date -
Sep 3, 2015
app pub date -
Mar 26, 2013
filing date -
Mar 26, 2013
priority date (Note) -
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Abstract
A vertical mill for grinding material to be ground and a method for this are claimed, wherein the vertical mill has a grinding table and one or more grinding rollers. A ring duct with blade ring for a transport gas flow ascending around the grinding table is provided. An annular gap distance is present between a downwardly projecting oversize material cone and the upper region of the grinding rollers, through which annular gap distance a proportion of fine particles is also fed back in a recirculating manner to the grinding table.
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