What is the Core Function of a Screen Plate?
- Particle size classification: Separate materials by particle size (such as ore sorting)
- Solid liquid separation: intercepting solids and passing liquids through (such as sewage filtration)
- Impurity removal: Screen out rejects(such as pulp rejects)
- Material dehydration: Remove surface moisture (such as sand washing dehydration)
Material of Screen Plate
- High manganese steel: Strong impact resistance, can be welded to repair non corrosion-resistant mine vibrating screens (iron ore).
- Stainless steel 304/316: corrosion-resistant, food grade safe, high cost, low hardness, suitable for food processing and chemical screening.
- Polyurethane: Excellent wear resistance (≈ 8 times that of steel), poor noise reduction and high temperature resistance (<80 ℃), fine particle grading (quartz sand)
- Rubber: has good elasticity, anti sticking material is prone to aging, and its lifespan is short. Wet material screening (coal)
What are the Structural Designs of Screen Plates?
- Flat type: Low overall stamping/laser cutting cost, easy replacement.
- Wave shaped: The curved convex design increases the screening area and prevents material blockage.
- Modularization: Small unit assembly (with quick release buckle), partial damage can be replaced separately.
- Reinforced rib type: Back welded support skeleton to resist heavy load impact (large ore)
How to Install the Screen Plate?
- Bolt fixation: Traditional method, high reliability but slow replacement.
- Tensioning type: The screen plate is tightened on the frame (requires special tools), suitable for fine screening.
- Quick installation of snap fasteners: No tools required, replacement can be completed within 5 minutes (selected for modern production lines).
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What Industries Can Screen Plates be Used in?
- Mining sector
Heavy duty vibrating screen plate
Design: 12-16mm thick high manganese steel+back cross reinforcement rib
Openings: Square holes (50-150mm) are used for primary crushing, and circular holes (10-30mm) are used for secondary screening
Case: Separation of waste rock with a diameter of over 60mm in an iron ore production line
- Food processing
Sanitary grade screen plate
Material: 316L stainless steel mirror polished (Ra ≤ 0.8um)
Opening: Precision circular hole (0.5-3mm) or slit (0.3mm)
Application: Flour impurity removal and screening, powder milk dehydration
- Environmental protection industry
Dehydration screen plate
Structure: Polyurethane slit screen plate (slit width 0.5mm)+45 ° tilt angle installation
Principle: Sludge is squeezed and dehydrated under vibration, reducing its moisture content from 98% to 80%
- Building materials production
Composite wear-resistant screen plate
Design: Steel frame embedded with polyurethane screen block (opening 5-20mm) Advantages: lifespan up to three times that of metal screen plate, reducing downtime costs of aggregate production line.
- Waste Paper Screening
The screen plate is used for vibrating screen to separate the pulp rejects.
How to Choose Suitable Screen Plate?
Aperture=target separation particle size x1.2 (compensating for material bounce caused by vibration)
Balance of porosity:
High porosity (≥ 40%) → increases yield but reduces strength
Low porosity (≤ 25%) → Extend lifespan but limit processing capacity
Thickness selection formula:
Screen plate thickness (mm) ≥ maximum feed particle size (mm) x 0.1+wear resistance coefficient
(Wear resistance coefficient: manganese steel=2, polyurethane=5, rubber=3)
How to Increase The Screen Plate Production Efficient?
Anti blocking technology for screen plate
Adhesive material: Use trapezoidal holes (narrow at the top and wide at the bottom) or bouncing ball cleaning system.
Fiber materials: Ultrasonic assisted screening (such as recycling pulp processing).
Life extension for screen plate
Add wear-resistant lining plates (capable of withstanding 80% impact) at the feeding end of the sieve plate.
Preheat the polyurethane sieve plate to above 10 ℃ before winter use to prevent brittle cracking.
