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Product Overview The Screw-Trommel Feeder is an integrated processing unit combining precision screw feeding with rotary screening for challenging high-dust and adhesive materials. Compliant with GB/T 36865-2018 (Spiral Conveyor Standards) and GB/T 14521.5-1993 (Terminology for Screening Equipment), this dual-function system eliminates material buildup while ensuring continuous operation in mining, waste recycling, and mineral processing applications.

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Key Technical Parameters

1. General Specifications
   • Application: Handling sticky/cohesive materials (moisture ≤25%) such as clay-rich ores, municipal sludge, and wet biomass.
   • Throughput Capacity: 10–800 T/h (material-dependent).
   • Processing Stages: Simultaneous feeding, screening (1–150 mm), and dewatering.
   • Positioning: Heavy-duty solution for raw material preprocessing in extreme conditions.
2. Screw Feeder Module
   • Screw Configuration:
     • Diameter: 400–1,200 mm (shaftless design for sticky materials).
     • Pitch: 0.8–1.5× diameter (tapered sections available).
     • Speed: 5–60 RPM (stepless VFD control).
   • Drive System:
     • Power: 7.5–160 kW (IE4 efficiency per GB 18613-2020).
     • Torque: Up to 250 kN·m (planetary gear reducers).
3. Trommel Screen Module
   • Drum Geometry:
     • Diameter: 1.5–3.5 m (12-sided polygonal design).
     • Length: 4–15 m (modular segments).
     • Screen Media: Rubber/PU panels (5–30 mm apertures).
   • Rotation System:
     • Speed: 8–25 RPM (hydraulic or electromechanical drive).
     • Inclination: 3°–7° (adjustable via hydraulic legs).
4. Structural Design
   • Frame Construction: Q345B steel (GB/T 1591-2018) with abrasion-resistant coating.
   • Sealing System:
     • Dust Control: Multi-stage labyrinth seals (GB/T 16911-2008).
     • Waterproofing: IP68-rated electrical components.
   • Wear Protection:
     • Screw Liner: Hardox 450/ceramic composite.
     • Trommel Lifter Bars: Replaceable tungsten carbide tips.
5. Performance Metrics
   • Screening Efficiency: ≥92% for non-sticky materials; ≥85% for adhesive substances.
   • Dewatering Rate: Up to 30% moisture reduction.
   • Noise Level: ≤82 dB(A) at 1 m (loaded operation).
   • Maintenance Interval: 5,000 hours (centralized lubrication system).

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Design Innovations

• Self-Cleaning Mechanism: High-frequency vibrators (50–100 Hz) prevent screen blinding.
• Material Flow Optimization: Reverse-pitch screw segments break agglomerates.
• Hybrid Drive System: Combines hydraulic rotation (trommel) with electric screw control.
• Quick-Change Screen: Modular panels replaceable in ≤2 hours.

Typical Applications

• Pre-screening clay-bound iron ore in beneficiation plants.
• Organics separation in C&D waste recycling.
• Primary processing of oil sands in energy sectors.

Product Positioning Positioned as a rugged, high-capacity solution for raw material preparation, this feeder-screen combo reduces downstream equipment wear by 40–60%. It complies with GB/T 25615-2010 vibration limits and serves as a cornerstone for automated mineral processing lines.

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Compliance & Standards

• Mechanical Safety: GB/T 15706-2012 (Integrated risk assessment).
• Explosion Protection: GB 3836.1-2010 (Ex tD IIIB T130°C for dust environments).
• Welding Standards: GB/T 12467-2017 (Non-destructive testing Level II).

Optional Features

• Hot-oil heating system for frozen materials.
• AR 400 steel trommel with replaceable bolt-on liners.
• AI-powered blockage prediction system.
• Dual-water spray bars (60 bar pressure).

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Operational Advantages

• 25% Energy Savings: Regenerative braking captures trommel rotation energy.
• Zero Downtime Design: Split housing allows in-situ screw maintenance.
• Climate Adaptability: Winterized bearings (-40°C) and tropical cooling fans (+55°C).