The anti - clogging screen is a special - type screen designed for the screening of wet, sticky, and fine - grained materials. It solves the problem of easy clogging of traditional screens through structural optimization or material innovation, and is widely used in high - difficulty screening operations in industries such as mining, building materials, and chemical engineering.
Core Anti-blocking Technologies and Features Self-cleaning Structural Design Tapered Hole Shape: Sieve holes are inverted conical (e.g., polyurethane screen with a 140° cone angle). The conical surface thrust prevents material from 滞留 (sticking) when falling, making it ideal for sticky materials like wet slime and stone powder. Elastic Deformation Design: Using elastic materials like polyurethane, high-frequency vibration during screening creates relative displacement between particles and the mesh surface. Elastic relaxation shakes off adhered materials, as seen in 弛张筛 (tension screen) meshes. Anti-adhesion Material Application Coating low-surface-energy materials like Teflon (PTFE) on the surface to reduce adhesion between materials and the mesh; or using stainless steel with nano-coatings to lower wet material viscosity. Open Area Ratio Optimization Adopting staggered hole arrangement and variable aperture design to increase the open area ratio by 15%-30% compared to traditional screens (while ensuring strength), reducing particle accumulation space. Application Scenarios Mining Industry: Screening wet iron ore powder and gold ore with high clay content to avoid efficiency loss from material sticking. Building Materials Industry: Separating stone powder and finished sand in manufactured sand production lines, solving blockage of fine-grained wet sand. Environmental Protection: Screening domestic waste (e.g., plastic and kitchen waste separation) to prevent organic matter from adhering to sieve holes. Food & Medicine: Screening fine powders like flour and sugar with food-grade anti-blocking screens to meet hygiene standards. Selection and Maintenance Tips Selection by Material Viscosity High-viscosity materials (e.g., coal slime): Prioritize polyurethane tension screens or stainless steel long-hole screens with vibration devices. Medium-viscosity fine particles: Choose tapered-hole polyurethane screens or surface-coated anti-blocking screens. Maintenance Points Regularly clean residual materials on the screen surface to prevent long-term adhesion and hole blockage.Apply anti-rust treatment to metal screens in humid environments; keep polyurethane screens away from strong oxidants to prevent aging.
