What is the reason for too much return material in the impact crusher?

The impact crusher is a commonly used crushing equipment, mainly used for crushing and processing materials such as various mines and buildings. However, sometimes there will be too much return material, which seriously affects the crushing efficiency of the equipment and reduces the service life of the equipment. This article discusses this issue in depth, analyzes its causes, and proposes corresponding solutions.

Ⅰ. Reasons for too much return material in the impact crusher

1. The rotor speed is too high or too low: The rotor speed is an important factor affecting the crushing effect of the impact crusher. If the rotor speed is too high, the material will stay in the crushing chamber for too short a time, and the crushing will not be sufficient; if the rotor speed is too low, the impact force of the material in the crushing chamber will be insufficient, which will also lead to insufficient crushing.

2. The hopper and discharge port are not designed reasonably: The internal structure of the impact crusher needs to be reasonably designed, otherwise it is easy to have too much return material. For example, the position of the feed port and discharge port of the crusher is unreasonable, which causes the material to easily pass through this equipment back and forth during the crushing process, which will also cause the return material phenomenon.

3. Different hardness and humidity of materials: The hardness and humidity of materials have a direct impact on the crushing effect and recycling of equipment. If the hardness of the material is too high or the humidity is too high, it will cause difficulty in crushing the material, and it will not be able to absorb the impact force well, and there will be too much return material.

4. Severe wear of equipment: During the use of the impact crusher, the rotor, impact plate and other parts will wear. When the wear is serious, the shape and size of these parts will change, resulting in reduced crushing effect.

Ⅱ. How to solve the problem of too much return material in the impact crusher

1. Control the rotor speed: According to the nature of the material and the requirements of the crushing effect, adjust the rotor speed in time to make the impact force of the material in the crushing chamber moderate and improve the crushing effect.

2. Design a reasonable hopper and discharge port: The position and measures of the crusher hopper and discharge port are also very important. Reasonable design can reduce the amount of return material and improve the crushing efficiency during the crushing process. For example, in the design of the hopper, a vibration adjustment plate can be added to increase the residence time of the material in the crushing chamber and reduce the return material.

3. Check the hardness and humidity of the material: Hardness and humidity are the most important factors affecting the crushing effect of the crusher. It is necessary to test the material to ensure that the hardness and humidity of the material are within the range required by the equipment, so as to better improve the crushing efficiency and reduce the return material.

4. Replace worn parts in time: For severely worn parts, such as rotors, impact plates, etc., they should be replaced in time. At the same time, the equipment should also be regularly inspected and maintained to ensure the normal operation of the equipment.