Impact crusher is a commonly used type of crushing equipment, which is mainly used for crushing and processing of various mines, buildings and other materials. However, sometimes there is too much return material, which seriously affects the crushing efficiency of the equipment and reduces the service life of the equipment. This paper discusses this problem in depth, analyzes its causes, and proposes corresponding solutions.
I.Reasons for too much return material of 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, it will cause the material to stay in the crushing chamber for too short a time, and the crushing is not sufficient; if the rotor speed is too low, it will cause the impact force of the material in the crushing chamber is not enough, which will also lead to the crushing is not sufficient.
2. Unreasonable design of hopper and discharge opening: The internal structure of impact crusher needs to be reasonably designed, otherwise it is also easy to return too much material. For example, the position of the feed port and discharge port of the crusher is not reasonable, resulting in the material in the crushing process back and forth easily through this equipment, which will also cause the phenomenon of material return.
3. Different hardness and humidity of materials: the hardness and humidity of materials have a direct impact on the crushing effect and recovery of the equipment. If the hardness of the material is too high or the humidity is too high, it will cause the material to be difficult to be crushed, and cannot absorb the impact force well, and there will be too much return material.
4. Serious wear and tear of the equipment: In the process of using the impact crusher, the rotor, impact plate and other parts will be worn. When the wear is serious, the shape and size of these parts will change, resulting in reduced crushing effect.
Second, how to solve the problem of too much impact crusher return material
1. Control the rotor speed: according to the nature of the material and the requirements of the crushing effect, adjust the rotor speed at the right time, so that the impact of the material in the crushing chamber is moderate, improve the crushing effect.
2. Reasonable design of hopper and discharge opening: the position and measures of crusher hopper and discharge opening are also very important. Reasonable design can reduce the amount of return material in the crushing process and improve the crushing efficiency. For example, in the design of the hopper, 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, you need to test the material to make sure that the hardness and humidity of the material is within the range of the equipment requirements, in order to better improve the crushing efficiency and reduce the return material.
4. Replace the worn parts in time: For the parts with serious wear and tear, such as rotor, impact plate, etc., they should be replaced in time. At the same time, it is also necessary to carry out comprehensive inspection and maintenance of the equipment on a regular basis to ensure the normal operation of the equipment.
