The timing and judgment criteria for replacing the crushing wall

Degree of wear
The wear of the crushing wall is the main reason for replacement. The degree of wear can be judged by the following methods:

1. Observe the surface of the crushing wall: If there are obvious pits, grooves or wear marks on the surface of the crushing wall, it indicates that it has been severely worn and needs to be replaced.
2. Measure the wall thickness: Use an ultrasonic thickness gauge to measure the thickness of the crushing wall regularly. If the wall thickness is lower than the minimum thickness recommended by the manufacturer, the crushing wall should be replaced immediately.
3. Check the crushing effect: If it is found that the particle size of the material after crushing becomes larger and the crushing efficiency is reduced, it may be caused by the wear of the crushing wall. It is necessary to check the wear of the crushing wall.

Deformation
The crushing wall may deform during long-term use. The deformed crushing wall not only affects the crushing effect, but also may cause damage to other parts of the crusher. Methods for judging whether the crushing wall is deformed include:

1. Observe the matching of the crushing wall and other parts of the crusher: If the matching clearance between the crushing wall and the frame, moving cone and other parts is found to be too large or too small, the crushing wall may be deformed.
2. Use special tools for detection: Use special tools such as dial gauges or feeler gauges to detect the flatness and roundness of the crushing wall. If it exceeds the allowable range, it indicates that the crushing wall has been deformed and needs to be replaced.

Cracks and damage
The crushing wall may crack or be damaged during use. These conditions will seriously affect the safe operation of the crusher, and the crushing wall must be replaced immediately:

1. Observe the surface of the crushing wall: Check whether there are cracks, notches or breaks on the surface of the crushing wall. Any visible cracks should be regarded as a signal for replacement.
2. Knocking inspection: By knocking on the crushing wall, judge whether there are cracks or cavities inside it based on the sound. If the sound is abnormal, it indicates that there may be internal damage and further inspection is required.
3. Magnetic particle detection: For large crushing walls, magnetic particle detection methods can be used to detect surface and near-surface cracks.

Replacement cycle
The replacement cycle of the crushing wall depends on its material, working conditions and the nature of the crushed material. In general, the replacement cycle of the crushing wall is:

1. Hard rock crushing: When crushing hard rock, the crushing wall wears faster, and the replacement cycle is generally 3-6 months.
2. Soft rock crushing: When crushing soft rock, it wears slower, and the replacement cycle is generally 6-12 months.
3. Special material crushing: For special materials, such as highly abrasive materials, the replacement cycle may be shorter and needs to be adjusted according to actual conditions.

The replacement timing and judgment criteria of the crushing wall are the key to ensuring the normal operation and production efficiency of the crusher. By regularly checking the degree of wear, deformation, cracks and damage of the crushing wall, combined with the replacement cycle, the replacement of the crushing wall can be reasonably arranged to avoid production losses and safety accidents caused by crushing wall problems.