Summary：Material blockage is one of the common failures in crushing. For impact crusher, once the material is blocked, the equipment will be forced to shut down, which will affect the efficiency of whole crushing plant. So, what is the specific reason for the blocking of impact crusher? How should we handle it? Today we gonna show you the reasons and ways for this situation.
Material blockage is one of the common failures in crushing. For impact crusher, once the material is blocked, the equipment will be forced to shut down, which will affect the efficiency of whole crushing plant. So, what is the specific reason for the blocking of impact crusher? How should we handle it? Today we gonna show you the reasons and ways for this situation.
1. Blockage caused by materials with high humidity
If stone material has more water content with high viscosity, it's easy to stick to both sides of screen hole and liner after being crushed. This will occupy too much space in crushing chamber, and lower passing rate of screen holes, causing material blockage.
Solution: we can preheat the impacting plates and the feed inlet (install drying equipment), or sunburn the material to reduce the water content of it.
When the material was feed too much and too fast in impact crusher, the pointer of impact crusher ammeter will be large. When the rated current of the machine is exceeded, it will cause overload. So the material couldn't crush and discharge, which cause material blockage.
Solution:We should pay attention to the deflection angle of the ammeter pointer during the feeding process. If material blockage occurs, we should reduce the feeding amount immediately to make the machine run normally.
3. Too slow discharging
Generally, the feeding speed and the discharging speed are related. Too much feeding will cause material blockage, and too slow discharging speed will also cause a large amount of material blocked inside machine, which will cause blockage.
Solution:The feeding speed should be adjusted according to the processing capacity of impact crusher. Adjust the size of discharge port in time so that the crushed materials can be discharged smoothly. If the material changes, the size of discharge port should be changed accordingly.
4. Appropriate material
When the material is too hard, it is not easy to crush. In addition, the size of stone material exceeds the maximum range limited by impact crusher, and the discharge port may also be blocked.
Solution:We should choose proper material (which is suitable for impact crusher) before crushing, ensuring the correct feeding. It is not advisable to put too much material into crushing chamber. Meanwhile, an electric bell and an alarm light can be installed at the feeding port to control the feeding and avoid blockage caused by excessive input.
We can use jaw crusher to roughly crush the material before using impact crusher, ensuring make the material meet the crushing requirements as much as possible to avoid material blockage.
5. Wear of equipment parts
If the main parts of impact crusher are damage (such as the wear of hammer and impact plate), which will also cause material blockage phenomenon as poor crushing effect.
Solution:Check the parts carefully, if it's damage, replace the severely worn parts in time to ensure the crushing effect of impact crusher, and reduce the blockage of the materials.
6. The V-belt loose (insufficient transmission kinetic energy)
The crusher relies on the V-belt to transmit power to the sheave to achieve the purpose of crushing material. If the V-belt is loose, it will not be able to drive the sheave. This will affect the crushing of materials, or make crushed materials unable to be removed smoothly.
Solution:During the crushing, we should pay attention to check the tightness of V-belt, and adjust it in time if it is improper.
7. Spindle damage
As we all know, the spindle is a key part of impact crusher. If it's damaged, the other parts will be affected, which will make the machine can't operate normally, causing material blockage.
Solution: Operators and maintenance personnel need to pay more attention to the maintenance of spindle, lubricate in time, and solve problems in time to avoid affecting production.
8. Improper operation
Material blockage may also be caused by improper operation of the operator, like unfamiliarity with the process or error.
Solution: Equipment operators should undergo rigorous training before using impact crusher. They must not only be familiar with the operating specifications of the equipment, but understand the process of the entire operation.
9. Improper design of crushing cavity
The crushing cavity is the main part for impact crusher to process materials. After completion, the finished products will be discharged from the lower part. If its design is improper, the materials will easily cause blockage in the lower part of crushing cavity.
Solution: In order to avoid various problems caused by improper equipment design, it is best to buy machines from large manufacturers that are guaranteed.
Finally, when the impact crusher is blocked, do not repair blindly. First, we should find the cause of problem, and then take reasonable measures to solve it, minimizing the negative impact caused by blocking. If you have any questions or suggestions, please contact us online.