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Causes and solutions to common failure of ball mill

Date:2019-07-04 10:24 Source:未知Views:

Ball mill is one of the necessary equipment for pre-selection operation of concentrator. In the construction of the whole separation plant, the investment of ball mill equipment accounts for a large proportion, so it is particularly important to ensure the normal production of machinery and equipment.

However, in addition to the external environment, the main reason affecting the normal production of ball mill is the equipment failure is an important problem leading to normal production. In continuous production, the failure of ball mill can not continue to run, which may be affected by the operation of the whole separation plant system, which is a huge economic loss to the selection plant.

In the face of the problem of production or equipment failure of ball mill, it should be analyzed and diagnosed that "prescribing the right medicine" is an effective way to ensure the normal operation of ball mill.

At present, most of the common production and equipment faults of ball mill are: ball mill "rising belly", high bearing temperature, large vibration, big noise and so on.

First, the ball mill increases its belly

1, ball mill belly increase reason: usually ball mill bulge belly, for example: grinding water consumption control improperly, will directly affect grinding concentration, once the concentration is high will cause belly gain, or grinding medium loading or ball diameter ratio parameters unreasonable will also lead to ball mill belly increase.
2, ball mill belly increase phenomenon: ball mill belly will appear the following conditions, the main current meter indicates that the current is falling; ball mill ore discharge will spit large blocks, pulp gushing out; grading machine overflow "run thick" phenomenon is serious, sand return amount obviously increased; the ball mill operation sound will become dull, almost can not hear the impact of the steel ball sound.

3, the solution to the problem of ball mill: in view of the phenomenon of "rising belly" of ball mill, the solution of matching the corresponding problem is to adjust the water consumption of ball mill and control the grinding concentration within the established range; to reduce the feeding amount of ball mill or stop feeding for a short time to meet the feeding requirements, not only can effectively reduce the working load of ball mill, but also ensure the passage of medium.

Second, the bearing temperature of ball mill is high

1, the reasons for the high bearing temperature of the ball mill: there are many reasons for the high bearing temperature of the ball mill, about because each lubrication point is not lubricated in place; the lubrication pipeline is blocked; the side clearance of the bearing is too small or too large to form a uniform film on the bearing; the grease of the rolling bearing is too much or too little; the sealing device of the hollow shaft at both ends of the grinding body is too tight.

2, bearing temperature is too high: ball mill bearing temperature is too high, easy to produce pitting corrosion, crack or melting phenomenon and so on.

3, the solution to the high bearing temperature of the ball mill: in view of the high bearing temperature of the ball mill, the matching corresponding problems are solved as follows, check whether the lubricating oil brand and lubricating oil quality pass through, and ensure that each lubrication point is lubricated in place; clean up the tubing blockage phenomenon in time; lift the oil pressure Jack used in the ball mill cylinder body, pull the bearing pad from one side and deal with the tile mouth; According to the regulations, the lubricating grease is generally 1: 2 ≤ 1 / 2 of the bearing gap, and the spacing between the hollow shafts at both ends of the grinding body is adjusted.

Note: When the temperature of the bearing of the ball mill is above 70 ℃, the hand is close to the feeling of burning and burning, or when the ball is smoking, it is important to keep in mind to stop directly. The oil can be manually poured from the bearing to cool it. After the normal temperature is restored, the machine stops. If the forced parking is adopted, it is possible to cause the bearing to burn, or the phenomenon of the hollow shaft and the large-scale "to hold one's head".

III. The vibration of the ball mill is large

1, ball mill vibration: most of the vibration of ball mill is caused by coupling, motor, reducer and so on. When the clearance of the two wheels of the coupling is too small to compensate for the amount of driving driven by the motor when the motor is started, the transmission coupling of the reducer, motor and transmission shaft does not maintain coaxiality, the two shafts are different from each other, and the link bolts of the coupling are not tightened symmetrically, etc.

2, the ball mill vibration phenomenon: the ball mill starts with a strong shock.

3, the solution to the vibration of the ball mill is as follows: in view of the strong vibration sense of the ball mill, the matching corresponding problems are solved as follows, the rotor of the ball mill is pulled out and the balance point is found out separately; each wheel is adjusted to reach concentric according to the prescribed symmetrical clearance; and the bolt is connected with the symmetrical fastening coupling joint with the same moment.

Fourth, there is a lot of noise in gears or bearings

1, the noise of gear or bearing is large: usually, the sound of ball mill gear and bearing is uniform and stable under normal operation, and the main reasons for abnormal sound are as follows: serious gear wear; bad gear meshing, large gear ring runout deviation; loosening of fixed bolt or corresponding connection bolt of large tooth ring; serious wear of bearing sleeve; improper installation of bearing, etc.

2, gear or bearing noise phenomenon: ball mill reducer operation sound abnormal, noise.

3, gear or bearing noise solution: in general, gear or bearing noise is mostly caused by serious wear and tear between the two or between gears, need to stop repair, adjust or replace gear or bearing; adjust bearing; fasten so bolt connection.

In the process of operation of ball mill, it is not only the above mentioned problems, but also all kinds of faults may be caused by a variety of reasons. It is an effective way to improve the whole efficiency of the separation plant that the problems can be found in time and improved in time.


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