What should be noted when feeding materials into a vibrating screen during operation

Due to the influence of material properties, practical application of vibrating screens indicates that particles smaller than 3/4 of the screen aperture size tend to slip through the mesh, termed “easily screened particles.” Particles larger than 3/4 of the aperture size, which struggle to pass through the mesh, are termed “difficult-to-screen particles.” The moisture content of materials also impacts screening efficiency. Dry materials are easier to screen, while surface moisture increases stickiness. Surface moisture causes fine particles to clump together and adhere to larger particles, potentially clogging screen apertures and hindering screening. Additionally, the difficulty of screening is influenced by the feed rate and volume, which are closely tied to operator practices. Therefore, to ensure the vibrating screen operates normally and extends its service life, the following issues should be noted:

1. For materials containing surface moisture, prepare for material dehydration in advance. If the material contains easily agglomerating viscous substances (such as clay), even with minimal moisture, it will form clumps, causing fine silt to mix into the oversize product and quickly clog the screen openings. In such cases, consider pre-washing the ore.

2. Pay attention to the feeding method when introducing material into the vibrating screen. Ensure uniform feeding and avoid overloading the vibrating screen. Excessive feeding disrupts normal material movement on the screen surface, causing the screen mesh to loosen and significantly reducing processing capacity. To prolong the service life of the vibrating screen motor, maintain uniform feeding at a rate sufficient to meet the equipment's processing capacity.

3. For feeding methods involving strong impact forces, a buffer hopper must be installed. Otherwise, material will directly impact the screen surface, causing damage to the screen and consuming more of the excitation force generated by the vibration source, thereby reducing screening output.

4. Before material discharge, regularly inspect the screen mesh tension. Insufficient tension causes mesh vibration, typically leading to fractures or damage along the mesh edges or at the edge-binding strips.

5. Before material discharge, regularly inspect the screening layer and load-bearing layer of the screen mesh. Screens typically feature an upper screening layer and a lower load-bearing layer, which must fit tightly together. If the screen's pre-tensioning process is inadequate, when the load-bearing layer at the bottom is tightened, the screening layer remains loose. During operation, this causes excessive vertical vibration of the screen, preventing effective compression against the frame and accelerating screen damage.

These are the key considerations for material feeding into vibrating screens! Feel free to consult OCP Heavy Industry—our experts are ready to assist you! Click the website chat icon for immediate free consultation, available 24/7.