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What to do if the impact crusher is stopped due to counterattack and broken material? 9 reasons and treatment measures to easily solve the problem of material blocking
Dec 20, 2019

Material blocking is one of the common failures in counterattack. In the production process, once the material is blocked, the equipment will be forced to stop, wasting a lot of time to clean up the accumulation, affecting the efficiency of the entire production line. 

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1. The material has high humidity, which is easy to stick and cause blocking.

If the raw material has a large water content and a large viscosity, the crushed material will easily adhere to the sides of the sieve holes and the lining plate, resulting in a reduction in the volume of the crushing cavity and a lower sieve hole passing rate, resulting in material blockage.


Solution: You can pre-heat the impact plate and feed port, install drying equipment, or insolate the material to reduce the water content of the material.


2. Overfeeding, too fast

Eating too much at one time is too easy to choke, and the same is true of the impact crusher. When the impact crusher feeds too much and is too fast, it is too late to crush and discharge, causing blockage.


Solution: In the feeding process, pay attention to the deflection angle of the ammeter pointer. When the feeding is large, the pointer that breaks the ammeter will be too large. When the rated current of the machine is exceeded, overload operation will be caused. In this kind of scenario, too long working time will cause the material to block or even burn the motor of the machine. When this kind of scenario occurs, on the one hand, it is necessary to immediately reduce the feeding amount and adjust it by adjusting the feeding machine.


3, the discharge speed is too slow

Under normal circumstances, the feeding speed and the discharging speed are balanced. Too much and too fast feeding will cause blockage, and too slow discharging speed will also cause a large amount of material to be blocked inside the machine, which will cause blockage and make The device is not working properly.


Solution: Avoid overloading the machine, adjust the feeding speed according to the processing capacity of the machine; adjust the size of the discharge opening in time according to the actual situation in the production, so that the crushed material can be discharged smoothly. If the broken material changes , Should also adjust the size of the discharge port accordingly.


4, the material is too hard, too much or the particle size is too large

When the hardness of the material is large, it is not easy to break, or the feed size exceeds the maximum range defined by the impact crusher, and the discharge opening will be blocked when the crushing between the impact plate and the plate hammer is insufficient.


Solution: Before the material enters the crushing cavity, the applicable materials of the impact crusher should be clarified, especially the requirements for the nature of the material to ensure the correct feeding of the crusher; it is not easy to put too much material into the crushing cavity. An electric bell and alarm flashing light can be installed at the feeding port to control the feeding and avoid the blocking of too much material; after rough breaking the large piece of material, it is put into the crushing cavity to make the material reach or approach the crushing as much as possible. Required to avoid material blockage.


5, equipment parts wear

If the main components of the impact crusher are worn (such as the wear of the hammer and the impact plate), the material crushing effect will also cause blockage.


Solution: Pay attention to check the wear of the components, and replace the severely worn components in time to ensure the crushing effect of the material and reduce the blockage of the material.


6. The V-belt is loose and the transmission kinetic energy is insufficient.

The crusher relies on the V-belt to transmit power to the trough to achieve the purpose of material crushing. If the V-belt is too loose, it will not be able to drive the trough, affect the crushing of the material, or prevent the broken material from being smoothly removed Cause a blockage.


Solution: In the process of production crushing, pay attention to check the tightness of the V-belt. If it is improper, adjust it in time.


7, counterattack broken spindle damage

The main shaft is the "lifeblood" of the normal operation of each component of the crusher. If the main shaft is damaged, then each component of the equipment will be "involved" and cannot operate normally, which will cause the equipment to stop moving and cause material blockage.


Solution: The operation and maintenance personnel need to pay more attention to the maintenance and repair of the spindle, timely lubrication, and good maintenance, and solve problems in time to avoid affecting normal production.


8. Improper operation

Part of the cause of the blockage is the operator's error, which may be unfamiliar with the process or a temporary error.


Solution: Equipment operators should undergo rigorous training before they are qualified. They must not only be familiar with the equipment's operating specifications, but also understand the entire production line process.


9. Improper crushing cavity design

The crushing cavity is the main place for impact crushing and processing of the impact crusher. It is discharged from the lower part after completion. If the design is not correct, the material can easily cause blockage in the lower part of the crushing cavity. 


Solution: The crushing cavity can be improved. The curved crushing cavity is adopted, that is, the bite angle of the crushing cavity is gradually reduced from top to bottom. This type of crushing cavity is conducive to the falling of the large pieces of material that have been broken, and it can also make small The material is freely discharged from the crushing area, so that the material can be smoothly discharged and the blockage of the material can be reduced. In order to avoid various problems caused by improper equipment design, it is best to buy machines from large manufacturers with guarantee.

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