Why Is My Polyurethane Screen Panel Blinding?

Screen blinding—the clogging of apertures—is a persistent headache in mineral processing. Even premium polyurethane panels can fall victim when material characteristics, design choices, or operating conditions are misaligned.

Here's a comprehensive breakdown of the primary causes and actionable remedies.

1. Material Properties

• Near-size particles (±10% of aperture) wedge into openings (pegging)

• Moisture >8% causes agglomeration and coating of fines (<0.074mm)

2. Design Deficiencies

• Open area <40% restricts throughput

• Inappropriate aperture geometry (round holes trap irregular grains; slots 3:1–5:1 improve passage)

• Panel hardness too high (Shore A >90 for fine wet ores loses self-cleaning flexibility)

3. Operational Issues

• Low vibration (<1200 rpm) or amplitude (<5mm)

• Incorrect deck slope (<15° piles up; >25° races through)

• Overfeeding (>5 t/(m²·h))

4. Installation Oversights

• Misaligned or unevenly tensioned panels

• Neglected post-shutdown cleaning

Quick Fixes

Prevention

• Slotted openings (3:1–5:1 aspect ratio)

• Right hardness: fine wet ores = Shore A 65–70; coarse = 85–90

• Tapered self-relieving apertures

• Auxiliary cleaning systems

• Routine inspections; proper tension and alignment

Contact Us

Contact: Annie Lu
Email: annie.lu@huataogroup.com
Phone / WhatsApp: +86 180 3242 2676
Website: http://www.tufflexscreen.com

HUATAO Group – Your Trusted Partner for High-Performance Screening and Wear Solutions.