Reasons and solutions for the return of material in jaw crushers

Jaw crushers are commonly used crushing equipment in coarse crushing operations. They are widely used in the crushing of various ores and bulk materials in industries such as mining, smelting, building materials, roads, railways, water conservancy and chemicals. The jaw crusher may return material when working. The material is not squeezed by the movable jaw plate and the fixed jaw plate, but is squeezed out of the feed port. This situation will not only reduce production efficiency, but may also cause harm to the human body.

Reasons for the return of material in jaw crushers

1. Problems with the jaw crusher itself. The new jaw crusher parts do not match the dimensions of the drawings. For example, the length, thickness, length and angle of the toggle plate of the jaw plate, and the dimensions of the inner cavity of the frame 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, so that the material and the jaw plate cannot generate enough friction to overcome the upward component of the crushing force, and the material is squeezed out by the vertical upward force and slides toward the feed port.

2. Material force is unbalanced. The vertical force of the material to be crushed in the crushing chamber is easily unbalanced. Under the action of the upward force, the material is prone to return.

3. The width of the discharge port is too large. For the same specification of jaw crusher, the larger the width of the discharge port, the more likely it is to return. During the crushing process, the material is in direct contact with the jaw plate, resulting in friction. The more severe the wear of the jaw plate, the greater the possibility of return.

4. The size difference of the material to be crushed is too large. When the size of the material to be crushed by the crusher is very different, it is easy to return.

Solution to the return of the jaw crusher

1. Use a crusher of appropriate specifications according to the material situation.

2. When the jaw plate is worn and the material is returned, it should be repaired or replaced with a new jaw plate in time.

3. When the particle size of the material is too different, screen it first; pre-process it with a coarse jaw crusher, and then use a fine jaw crusher for fine processing, so as to ensure the processing requirements of the material.

4. Add a wedge-shaped pad at the joint surface of the movable jaw and the movable jaw plate to reduce the angle between the two jaw plates so that the angle between the two jaw plates is less than twice the friction angle, eliminating the phenomenon of material return.

5. A guard plate can be welded above the feed port of the jaw crusher to prevent the material from flying out of the feed port and endangering the personal safety of the operator. Note: After the material return occurs, the operator must pay attention to safety! When the jaw crusher has material return, the maintenance personnel should find out the cause and take corresponding countermeasures to avoid affecting production.

The above are the reasons and solutions for the material return of the jaw crusher. For the treatment of the material return of the jaw crusher, it can be used in combination with the actual situation of the equipment, thereby reducing the maintenance cost of the equipment and improving production efficiency. If you want to know the basic information of other equipment, you can call or contact the CFTC online customer service staff, and we will give you a satisfactory answer to your questions.