Method for verifying the filling level of coal in a ball mill
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United States of America Patent
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Sep 16, 2003
Grant Date -
N/A
app pub date -
Jan 9, 2002
filing date -
Apr 15, 1999
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Abstract
The method of monitoring the level of filling of a ball mill which is fed with material to be pulverized and is provided with a drum mounted to rotate on two bearings which are relatively far apart, consists in measuring the weight of the drum using strain gauge weight sensors (11-16) under the bearings supporting the drum of the ball mill and comparing the measured weight to a predefined set point value to regulate the feeding of material to be pulverized to the ball mill. In addition, before the comparison step, the measured weight is corrected by a first weight value (F.sub.v) representative of the vertical component of the force created by the torque driving rotation of the drum.
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