Common problems & treatment measures of ball mill

In the course of using the ball mill, various problems will inevitably occur, and there are different treatment measures for different problems.

1.  When the ball mill is running, there is a regular beating sound, and the sound is loud. This is because part of the liner bolts are not tightened. When the ball mill rotates, the liner hits the barrel of the ball mill. Judge the position of the liner of the ball mill according to the sound, find out the loose bolts, and tighten them separately.

2.  The temperature of the bearings of the ball mill and the motor has risen, exceeding the regulations. Try to check whether the temperature of the bearing part or all of it is too high by hand. Check and deal with the ball mill from the following points.

(1) Check the lubrication points of each part of the ball mill, and whether the type of lubricating oil used is consistent with the factory manual of the equipment.

(2) Check whether the lubricating oil and grease of the ball mill have deteriorated.

(3) Check whether the lubrication pipeline of the ball mill is blocked, or the lubricating oil does not directly enter the lubrication point, and the insufficient amount of oil causes heat.

(4) The side clearance of the bearing bush of the ball mill is too small, the clearance between the bearing bush and the shaft is too large, and there are too many contact points, which can not form a uniform oil film on the bearing bush.

(5) There is too much or too little grease in the rolling bearing of the ball mill. Too much forms the rolling elements and agitates the grease to generate heat, and the heat is not easy to dissipate. If the lubrication is too little, the oil should be added enough according to the regulations, generally 1/3~1/2 of the bearing gap is more appropriate.

(6) The sealing device of the hollow shaft at both ends of the ball mill body is too tight, or the iron part of the sealing body is in direct contact with the shaft.

The above-mentioned problems shall be dealt with according to their reasons. If the side clearance of the bearing bush is too small, or the contact angle at the bottom is too large, the grinding cylinder must be jacked up with an oil hydraulic jack, the bearing bush must be pulled out from one side of the shaft, and the tile opening must be scratched separately.

3.  Heating of ball mill reducer bearing:

In addition to checking the bearing temperature rise of the ball mill, check whether the vent hole of the reducer is blocked, and unblock the vent hole.

4.  After the ball mill motor with reducer is started, the vibration occurs, the main reasons are:

(1) The gap between the two wheels of the ball mill coupling is too small to compensate for the amount of movement caused by the self-finding magnetic center when the motor is started.

(2) The method of aligning the coupling of the ball mill is incorrect, causing the two shafts to be misaligned.

(3) The connecting bolts of the ball mill coupling are not tightened symmetrically, and the degree of tightening force is different.

(4) The outer ring of the ball mill bearing moves.

Treatment method: Adjust the gap according to the regulation to make the two shafts concentric. Tighten the coupling bolts of the coupling symmetrically with the same torque. When the rotor is unbalanced, take out the rotor of the ball mill to find a static balance.

5.  When the ball mill reducer drives the mill, huge vibration occurs:

(1) The balance shaft of the ball mill and the reducer, the shaft center is not in a straight line, the reason is:

When the mill was installed with the liner, the secondary grouting was not carried out, or the anchor bolts after the secondary grouting were not fastened properly, the mill cylinder was rotated by the hoist, which caused one end of the mill cylinder to shift, and the two shaft centers were not in line. Vibration occurs after the reducer drives the mill.

Treatment method: re-adjust so that the axis of the ball mill mill and the axis of the reducer are on the same plane axis.

(2) The large-scale ball mill is large in size and heavy, which causes the foundation to sink; displacement occurs. Set up monitoring settlement points next to the foundation; make observations and make adjustments if there is sinking.

6.  The running sound of the reducer of the ball mill is abnormal:

The sound of the normal operation of the ball mill reducer should be uniform and stable. If the gear has a slight knocking sound, a hoarse friction sound, and there is no obvious change during operation, you can continue to observe, find out the cause, and stop the ball mill for treatment. If the sound is getting louder, stop the ball mill for inspection immediately.