Jaw crushers are generally used for rough crushing during the crushing process and are a type of crushing equipment that we often see. The jaw crusher has many users and a wide range of applications, but many users often encounter a problem during the use process - the phenomenon of material return in the jaw crusher. What is the phenomenon of material return in a jaw crusher? Refers to the phenomenon where the material is not squeezed by the movable and fixed jaw plates, but is squeezed out of the feeding port. This situation occurs from time to time, which can seriously affect the production efficiency of the jaw crusher, and even threaten the personal safety of the operator in certain situations. How to deal with the phenomenon of material return in jaw crushers is something we need to learn. Next, Qiantong Machinery
Here are some solutions to the problem of material return in jaw crushers.
Let's take a look at the reasons for the return of material due to jaw breakage:
1. Problems with the jaw crusher itself: The components of the new jaw crusher do not match the dimensions on the drawing, such as the length and thickness of the jaw plate, the length and angle of the elbow plate, and the dimensions of the internal cavity of the frame, which are not standardized, resulting in inferior products; After long-term use, the angle between the two jaw plates is greater than twice the friction angle, which prevents sufficient friction between the material and the jaw plate to overcome the upward component of the crushing force. However, the material is squeezed out under the vertical upward force and slides towards the feed port direction.
2. Unbalanced material force: The material to be broken is prone to uneven force in the vertical direction of the crushing chamber, and under the action of upward force, it is prone to material return.
3. Excessive discharge port width: For jaw crushers of the same specification, the larger the discharge port width, the more likely it is to cause material return. During the crushing process, the material comes into direct contact with the jaw plate, causing friction. The more severe the wear on the jaw plate, the greater the possibility of material return.
4. The size difference of the material to be broken is too large: When the size difference of the material to be broken in the crusher is very large, it is easy to experience the phenomenon of material return.
Solution to jaw fracture and material return:
1. According to the material situation, use a crusher with appropriate specifications.
2. When the jaw plate is worn and there is a phenomenon of material return, it should be repaired or replaced with a new jaw plate in a timely manner.
3. When the particle size difference of materials is too large, screen them; The coarse jaw crusher is used for pre processing, and then the fine jaw crusher is used for precision processing to ensure the processing requirements of the material.
4. Add a wedge-shaped pad at the joint surface between the movable jaw and the movable jaw plate to reduce the angle between the two jaw plates, ensuring that the angle between the two jaw plates is less than twice the friction angle, and eliminating the phenomenon of material return.
5. A protective plate can be welded above the jawbreak feeding port to prevent materials from flying out of the feeding port and endangering the operator's personal safety.
