High-Efficiency Pulverizer Screen Selection Guide: A Complete Analysis of Aperture, Material, and Lifespan
The screen is a core component of the pulverizer, directly affecting material fineness, equipment efficiency, and maintenance costs. Scientific selection requires comprehensive consideration of aperture matching, material properties, and lifespan. The following is a professional analysis of these three key dimensions
Aperture Selection: Matching Raw Material Characteristics
| Raw material type | Recommended aperture | Particle application scenarios |
| Wood chips/sawdust | 3-5mm | Ring die pellet machine (high density fuel) |
| Straw/rice husk | 6-8mm | Flat die pellet machine (anti-fiber winding) |
| Palm shell/kernel | 8-10mm | Industrial boiler fuel (strong burning resistance) |
Key Principles
Aperture≤1/2 of the target particle diameter (e.g., for 6mm particles, select a sieve≤3mm).
For high-fiber raw materials, choose a large aperture to prevent clogging; for hard raw materials, choose a small aperture to improve fineness.
Material determines lifespan: balance between wear resistance and cost
| Material Type | Applicable Scenarios | average life expectancy | Price Comparison |
| Manganese steel (65Mn) | Wood chips, bamboo chips and other hard materials | 300-500 hours | Base Price |
| Stainless steel 304 | High-humidity straw, corrosive raw materials | 400-600 hours | +30% |
Selection Recommendations
Annual production <1000 tons: Choose manganese steel, prioritizing cost.
Continuous production or high-wear materials: Choose tungsten carbide for higher long-term benefits.
Structural Design: Directly Impacts Lifespan and Efficiency.
Perforated Screen
Advantages: Smooth perforations, high sawdust throughput.
Disadvantages: Fibrous materials easily get stuck.
Woven Screen
Advantages: Flexible mesh resists straw entanglement.
Disadvantages: Easy deformation by impact with hard materials.
Self-Cleaning Screen
Advantages: Built-in bouncing balls prevent clogging (suitable for sticky materials like rice hulls).
Cost: 40% higher than ordinary screens.
Practical Tips for Extending Lifespan
Preventive Replacement Signals
Production Decline > 20% (Increased screen wear leading to increased return)
Uneven Material Coarseness (Screen deformation or partial damage)
Maintenance Tips
Daily: Clean residual material after shutdown.
Weekly: Check screen tension (droop≤2mm).
Selection Decision Flowchart
| Raw Material Type | → Select Aperture | → Determine Material | → Check the structure | → Calculate the cost |
| ↓ | ↓ | ↓ | ||
| Wood chips → 3mm | Hard material → Manganese steel | Anti-clogging → Self-cleaning screen | ||
| Straw → 6mm | Wet material → Stainless steel | General purpose → Perforated screen |
Conclusion
Screen selection is essentially an optimization question that considers raw material characteristics, production requirements, and cost control. Accurately matching aperture and material, combined with preventive maintenance, can increase pulverization efficiency by over 30%.
Note
For high-humidity raw materials (>25%), stainless steel screens are recommended to avoid the risk of downtime caused by rust and breakage.