Jaw Stone Crushers are usually used for coarse crushing operations. They are one of the common crushing equipment and have a wide range of user groups and application fields.
However, when using Jaw Stone Crushers, users may encounter material return, that is, the material is not effectively squeezed by the movable jaw plate and the fixed jaw plate, but is squeezed out of the feed port. This phenomenon not only reduces production efficiency, but also poses a threat to the safety of the operator.
Below VEST will make a detailed analysis of this issue for everyone, hoping that it will be of some help to everyone.
♦♦ The main reasons for the material return phenomenon in jaw crushers include:
1. Equipment problems: such as the size of new equipment parts does not match, the angle between the two jaw plates becomes larger after long-term use, etc., resulting in the material being unable to generate enough friction to overcome the upward component of the crushing force, and thus being squeezed out.
2. Unbalanced force on the material: The vertical force on the material to be broken in the crushing chamber is easily unbalanced, making the material easy to slide out of the feed port under the action of the upward component.
3. The width of the discharge port is too large: The larger the width of the discharge port, the more likely it is to have material return. At the same time, the more severe the jaw plate wear, the greater the possibility of material return.
4. Large material size differences: When the size of the materials to be crushed varies greatly, material return is also likely to occur.
♦♦ For the material return phenomenon of the jaw crusher, the following solutions can be taken:
1. Select a crusher of appropriate specifications: According to the material conditions, select a suitable jaw crusher to ensure that the equipment can meet production needs.
2. Repair or replace the jaw plate in time: When the jaw plate wear causes material return, it should be repaired or replaced with a new jaw plate in time to maintain the normal performance of the equipment.
3. Screen the material: Screen the material to ensure that the material particle size is not much different. For materials with large particle size differences, you can use a coarse jaw crusher for pre-processing first, and then use a fine jaw crusher for fine processing.
4. Adjust the angle between the two jaw plates: 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 so that it meets the requirement of less than twice the friction angle, thereby eliminating the material return phenomenon.
5. Add safety protection measures: Weld a guard plate above the feed port of the jaw crusher to prevent the material from flying out of the feed port and causing harm to the operator.
Through the above measures, the material return phenomenon of the jaw crusher can be effectively dealt with, production efficiency can be improved, and the safety of the operator can be ensured.
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