Patent ID: 6619574
Filing Date: 2003-09-16
Classification: B02C

Abstract:
A 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 (20) mounted to rotate on two bearings (201, 202) which are relatively far apart, said method comprising measuring the weight of the drum using weight sensors 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, the vertical component of the force created by the torque driving rotation of the drum being taken into account, the method being characterized in that said weight sensors are strain gauge weight sensors (11 to 16), and in that said vertical component is taken into account in the form of a correction of the weight measured by said sensors, performed before the comparison step, by means of a first weight value (Fv) representative of said vertical component and obtained from a measurement of the power (Pabs) of the motor driving rotation of the drum.