PM’s Raw Material Conveying System is designed for efficient, reliable handling of a wide range of materials, including OCC, mixed waste paper, and pulp bales. The system integrates Slat Conveyors and Roller Conveyors to ensure stable transport from intake areas to pulpers or shredders.
Modular design and easy assembly allow flexible layouts, fast installation, and low maintenance, while the conveyors are engineered for high reliability and seamless integration with downstream processes.
Ⅰ、Slat Conveyor
Slat conveyors are the backbone of raw material handling in pulp and paper mills. They efficiently transport heavy and bulky materials such as OCC, mixed waste paper, and bales from intake areas to pulpers or shredders.
Supported Materials:
OCC ;Mixed waste paper ; Virgin pulp bales ; Rejects / coarse contaminants
Key Technical Parameters:
| Parameter | Typical Range | Engineering Note |
| Conveyor width | 800 – 2400 mm | Sized for bale dimensions & throughput |
| Slat pitch | 160 / 200 / 260 mm | Ensures impact and wear resistance |
| Design capacity | 200 – 1200 t/day | Matches pulper capacity |
| Max load per meter | 150 – 500 kg | Depends on material density |
| Inclination angle | 0 – 30° | Ensures stable material flow |
| Drive power | 5 – 90 kW | Selected for load & efficiency |
| Operating mode | Continuous / Batch | Aligned with process logic |
| Slat material | Carbon steel / Alloy steel | Impact and abrasion resistant |
Structural & Modular Features
1. Machine Frame
Heavy-duty steel, modular segments, pre-drilled for easy assembly
Bolted sections allow shipping in modules and on-site configuration
Supports driving and tail devices, chain/plates, and tension device
2. Driving Device
Gear-motor with flexible coupling, mounted on frame
Easy connection to chain/plates
Optional side mounting for layout flexibility
3. Chain & Plates
Pre-assembled chains and slats for fast installation
Replaceable sections for wear maintenance
Adjustable guides maintain alignment and material stability
4. Tail Wheel Device
Smooth return of chain/slats
Mounted on frame, compatible with modular design
Can integrate with tension device
5. Tension Device
Adjusts chain/slat tension automatically or manually
Ensures smooth operation and minimizes wear
Easy access for maintenance
Customer Benefits:
- Clear, modular assembly logic
- Fast on-site installation, reduced downtime
- Easy inspection and maintenance
- Flexible for layout changes and scale expansion
Ⅱ、Roller Conveyor
Roller conveyors handle light-to-medium loads and connect pre-processed materials to downstream equipment. Ideal for shredded paper, pre-processed OCC, or trim waste.
Supported Materials:
Shredded paper ; Pre-processed OCC ; Trim waste / light rejects
Key Technical Parameters:
| Parameter | Typical Range | Engineering Note |
| Roller diameter | 50 – 150 mm | Supports load and stability |
| Roller spacing | 80 – 200 mm | Optimized for material support |
| Conveyor width | 500 – 1600 mm | Based on material size & flow |
| Conveyor speed | 0.05 – 0.3 m/s | Smooth, continuous transfer |
| Capacity | 50 – 500 t/day | Matches upstream throughput |
| Drive type | Electric / Gear motor | Reliable for continuous operation |
| Inclination | 0 – 10° | Minimal slope, gravity-assisted |
| Structure | Steel frame, modular | Easy maintenance access |
Structural & Modular Features
1. Machine Frame
Modular steel frame supporting rollers and drive units
Bolted or welded sections for easy assembly and transport
2. Drive Device
Motor and chain/belt drive
Mounted on frame, easy to replace or service
3. Rollers
Pre-mounted in cassettes for fast installation and replacement
Adjustable spacing for material flow control
4. Support Rails / Guides
Maintain roller alignment and prevent material deviation
Adjustable to integrate with upstream/downstream conveyors
5. Tension / Bearings
Ensures smooth roller rotation
Easy access for inspection and lubrication
Customer Benefits:
- Quick assembly & commissioning
- Easy adaptation to plant layout changes
- Minimal downtime for roller replacement
- Smooth, low-noise operation
Ⅲ、 System Integration & Engineering
- Slat and Roller conveyors form a complete raw material conveying system.
- Layout considers material type, moisture, density, and bale size.
- Interfaces seamlessly with pulpers, shredders, and downstream stock preparation units.
- PLC/DCS integration enables monitoring, interlocks, and automated start/stop.
- Modular design ensures easy maintenance and scalability.
Ⅳ、 Application Scenarios
- Material flow: Intake yard → Bale breaker → Slat Conveyor → Roller Conveyor → Pulper/Shredder
- System engineered for variable material size, moisture, and bulk density
- High reliability and minimized downtime ensure continuous pulp processing
- Supports OCC, mixed waste paper, virgin pulp bales, shredded paper, and trim waste
