Impact Crusher Blockage Problem? 8 Reasons and Solutions

Impact crushers are widely used in the crushing industry due to their simple structure, easy operation and maintenance. Still, they will inevitably encounter various problems in production, and blockage is one of the common problems. Below are 8 causes and solutions for impact breakage.

1. The material is too wet and sticky, causing blockage

The crushed material is easy to adhere to the grate plate sieve holes and both sides of the lining plate, if the raw material has a high moisture content and high viscosity, resulting in a reduction in the crushing chamber volume, a lower sieve hole pass rate, and material blockage.

Solution

Preheat the impact plate and feed port, install drying equipment, or expose it to the sun to reduce the moisture content of the material.

2. Too hard, too much or too large material

When the material is too hard and difficult to crush, or the feed particle size exceeds the maximum range of the impact crusher, and the crushing is insufficient between the impact plate and the hammer, the discharge port will also be blocked.

Solution

1) Before the material enters the crushing chamber, the applicable material of the impact crusher should be clarified, especially the requirements for the material properties, to ensure the correct feeding of the crusher;

2) The material put into the crushing cavity should not be too much. For this reason, an electric bell and an alarm flashing bell light can be installed at the feeding port to control the feeding and avoid blockage caused by too much material;

3) After blasting the large pieces of material, put them into the crushing cavity so that the material can reach or approach the crushing requirements as much as possible to avoid material blockage.

3. Too fast feeding speed and too slow discharging speed

Under normal circumstances, the feeding speed and discharging speed are balanced. If the former is too fast (the equipment is overloaded) or the latter is too slow, a large amount of material will be blocked inside the machine, causing blockage and making the equipment unable to operate normally.

Solution

1) To avoid overloading the machine, the feeding speed should be adjusted according to the processing capacity of the machine;

2)In production, the size of the discharging port should be adjusted in time according to the actual situation so that the crushed material can be discharged smoothly. If the crushed material changes, the size of the discharging port should also be adjusted accordingly.

4. The loose V-belt and insufficient kinetic energy transmission

The crusher relies on the V-belt to transmit power to the groove wheel to achieve the purpose of material crushing. If the V-belt is too loose, it will not be able to drive the groove wheel, affecting the crushing of the material, or making it impossible to discharge the crushed material smoothly, causing blockage.

Solution

During the production crushing process, pay attention to checking the tightness of the V-belt. If there is any inappropriateness, adjust it in time.

5. Wear of equipment parts

If the main parts of the impact crusher are worn, the material crushing effect will not be good and it will also cause material blockage.

Solution

Pay attention to checking the wear of the parts and replace the seriously worn parts in time to ensure the crushing effect of the material and reduce the blockage of the material.

6. The damaged main shaft of the equipment

The main shaft is the lifeline of the normal operation of all parts of the crusher. If the main shaft is damaged, all parts of the equipment will be affected and cannot operate normally, causing the equipment to stop moving and causing material blockage.

Solution

Operation and maintenance personnel need to pay more attention to the maintenance and repair of the main shaft, lubricate it in time, do a good job of maintenance, and solve problems in time to avoid affecting normal production.

7. Improper operation and mistakes

Some of the reasons for the blockage are the operator's mistakes, which may be caused by unfamiliarity with the process or temporary mistakes.

Solution

Equipment operators should undergo rigorous training and be qualified before they can take up their posts. They should not only be familiar with the operating specifications of the equipment but also understand the process of the entire production line. For example, before use, the machine should be started in strict accordance with the operating specifications, and the V-belt should be checked to see if it is loose to avoid material blockage caused by improper operation.

8. Improper design of crushing cavity

The crushing cavity is the main place for the impact crusher to crush materials. After completion, the materials are discharged from the bottom. If the design is improper, the materials can easily cause blockage in the lower part of the crushing cavity.

Solution

The crushing cavity can be improved, and a curved crushing cavity can be adopted, that is, the meshing angle of the crushing cavity gradually decreases from top to bottom. This type of crushing cavity is conducive to the downward fall of the crushed large pieces of material, and can also allow the fine materials to be freely discharged from the crushing area so that the materials can be smoothly discharged and reduce the blockage of the materials. To avoid various problems caused by improper equipment design, users are better to purchase machines from large manufacturers with guarantees.

The above 8 points are common reasons for the blockage of the impact crusher. No matter what kind of blockage situation, it will affect the crushing efficiency. Everyone should fully understand the relevant knowledge of the impact crusher, find the cause of the blockage of the impact crusher, prescribe the right medicine, and keep the equipment running normally.