The core component of the vibrating screen is the screen. A good screen is an important condition to ensure the accuracy and efficiency of the vibrating screen. However, if too much material is fed at a time, it is inevitable that the screen will block the holes, and the screen will wear out in the long run. The situation will affect the accuracy of the vibrating screen. The following are several common reasons and solutions for the blockage of the vibrating screen mesh for your reference.
Causes of blocking holes in vibrating screen
(1)Contain a large number of critical material particles close to the separation point. That is, the particle size of the crushed stone is critical to the mesh size of the screen. During the screening of the stone, such particles are stuck in the mesh and cannot pass through the screen smoothly, which is called critical hole blocking.
(2) There are many materials that have multiple contact points on the screen.
(3)There are many flake particles. Due to the crushing or the stone itself, there are many flake materials in the stone material, and the flake materials themselves cannot be smoothly passed through the screen during the screening. At the same time, the flake materials are intertwined into a net shape, which prevents other materials from passing through the screen and causes hole blocking.
(4)The diameter of the steel wire for the screen is too thick.
(5)The screened material contains high moisture and viscous substances such as mud and sand. Because there is a lot of mud in the stone, or when the stone requires water washing, the fine-grained stone will stick to each other into agglomerates due to the intervention of water on the one hand, and the soil will stick to the screen surface on the other hand, making it difficult to screen the material and causing blockage .
Except for the fourth type, the first and second types are inevitable. The third and fifth types are more or less existent. The fixed mesh screen cannot effectively overcome the impact of critical material particles on the screen hole. Blockage, resulting in low screening efficiency of the vibrating screen. Generally, the screening efficiency of a vibrating screen with a fixed mesh screen is less than 50%. Even if the amplitude is increased, it cannot effectively solve the blockage. Moreover, increasing the amplitude may affect the service life of the screen.
Method to solve the hole blocking of vibrating screen
In order to effectively solve the above-mentioned hole blocking problem, the effect of blocking holes can be achieved by changing the form of the mesh structure of the vibrating screen. Here are several kinds of blocking hole screens:
(1)Under the premise of meeting the construction requirements, deform the mesh and use a certain proportion of rectangular holes. For example, the original requirement of 3.5mm*3.5mm mesh is changed to 3.5mm*4.5mm rectangular holes. However, the direction of the mesh is different, which will affect the screening efficiency or the service life of the screen to a certain extent.
(2)It adopts diamond-shaped hole anti-blocking screen, which is made of the same two adjacent screen bars with small vibrations, which has a better anti-blocking effect.
(3)In order to further improve the anti-blocking effect of the vibrating screen, some manufacturers have introduced a triangular hole anti-blocking screen. The feature of this screen is that of the two adjacent screens, one is a static screen and the other The root is a moving screen.
In fact, there are many factors that affect the efficiency of vibrating screens, and we have also introduced them in detail in the article how to improve the screening effect of mine vibrating screens. In addition to the clogging of the screen, improper installation of the screen can also cause low efficiency of the vibrating screen. Therefore, every time you replace the vibrating screen, you must strictly follow the instructions provided by the manufacturer.