Screw conveyors, especially those compliant with CEMA (Conveyor Equipment Manufacturers Association) standards, are critical in sand and aggregate processing plants. They efficiently transport bulk materials like crushed stone, sand, and gravel with minimal spillage and energy consumption.
CEMA screw conveyors are designed for durability and high-capacity handling. Common configurations include:
– Trough Type: U-trough or tubular for enclosed transport.
– Screw Diameter: 6″ to 24″ (standard range).
– Capacity: Up to 300 tons/hour, depending on material density.
– Power: 1.5 kW to 30 kW motors.
| Model | Screw Diameter (mm) | Capacity (m³/h) | Max Length (m) |
|---|---|---|---|
| SC-200 | 200 | 15 | 20 |
| SC-400 | 400 | 60 | 30 |
In a typical sand production line, CEMA screw conveyors link crushers, screens, and storage silos. For example:
1. Primary Crushing: Transfers raw stone to jaw crushers.
2. Screening: Distributes screened aggregates to secondary crushers or washing systems.
Q: How to prevent material clogging?
A: Use shaftless screws for sticky materials or add cleanout ports.
Q: What maintenance is required?
A: Lubricate bearings monthly and inspect flight wear every 500 operating hours.
A project in Spain used SC-400 conveyors to transport crushed limestone (0–20mm) at 50 tons/hour. The system reduced dust emissions by 40% compared to belt conveyors, with a lifespan exceeding 10 years under abrasive conditions.
