The Heart of Your Concrete Batching Plant
The LSY Spiral Screw Conveyor is not just a generic conveying device; it is engineered specifically to meet the rigorous demands of concrete batching plants and asphalt mixing stations. Unlike standard slow-speed screw conveyors, the LSY series operates at higher RPMs to ensure rapid, continuous feeding of cement and fly ash into the weighing hopper.
We understand the common pain points in construction machinery: silo blockage, uneven feeding, and cement dust leakage. Our LSY model addresses these with a variable-pitch blade design and a tightly sealed tubular structure. It serves as the critical artery of your mixing plant, ensuring that your production cycle time is met without interruption.
Why Choose the LSY Series? (Key Advantages)
For procurement managers and plant engineers, reliability is key. Here is how the LSY solves your specific problems:
Zero Dust Leakage: The fully enclosed tubular housing, combined with our upgraded gearbox seals, prevents fine cement powder from escaping. This keeps your site clean and compliant with environmental regulations.
- Universal Installation: Equipped with a Universal Ball Joint at the inlet, this conveyor can be easily installed at various angles (up to 60 degrees) and compensates for slight misalignments between the silo flange and the conveyor body.
- No Clogging: We utilize a variable pitch design (smaller pitch at the inlet, larger at the discharge). This prevents material compaction at the feed point, a common issue when handling settled cement or fly ash.
- High Efficiency: With a propulsion efficiency 30% higher than standard LS conveyors, it minimizes residue inside the tube after shutdown.
Technical Specifications & Performance
Our LSY conveyors are constructed using high-strength Q235 Carbon Steel to withstand the abrasion of mineral powders.
| Model | Screw Diameter (mm) | Capacity (t/h) | Speed (r/min) | Motor Power (kW) | Max Inclination |
| LSY-200 | 200 | 35 - 50 | > 200 | 5.5 - 7.5 | ≤ 60° |
| LSY-250 | 250 | 50 - 70 | > 200 | 7.5 - 11 | ≤ 60° |
| LSY-300 | 300 | 70 - 100 | > 200 | 11 - 15 | ≤ 60° |
Note: Capacities are calculated based on cement powder (density 1.2-1.5 t/m³). Custom lengths range from 3 meters to 15 meters.
Application Scenarios
While versatile, the LSY is optimized for specific powder handling tasks:
- Concrete Batching Plants: Transferring cement from bulk silos to the mixer weigh scale.
- Stabilized Soil Mixing Stations: Handling lime and fly ash for road base construction.
- Dry Mortar Production: Feeding fine aggregates and additives.
- Chemical Powder Processing: Transporting non-corrosive mineral powders where sealing is critical.
Important Note: This model is NOT recommended for large lumps, sticky materials (like wet sludge), or food-grade applications. For those, please check our U-Trough Screw Conveyor or Stainless Steel Series.
Structural Design & Quality Assurance
To ensure a service life of over 5 years even in harsh outdoor environments, we focus on the details:
- Blade Technology: We use Cold-Rolled Continuous Flights rather than segmented welded blades. This results in a smoother surface, higher hardness, and better wear resistance.
- Middle Bearing: To support long spans (e.g., 9 meters or more), we install a hanging bearing with a wear-resistant alloy sleeve or oil-impregnated graphite, requiring minimal lubrication.
- Surface Treatment: All units undergo sandblasting followed by two coats of anti-rust primer and industrial topcoat (custom colors available) to resist corrosion from rain and humidity.
Project Case Study: Road Construction in Philippines
Client: A mid-sized infrastructure construction company in Cebu, Philippines. Challenge: The client was using an old belt conveyor to lift cement, which caused massive dust pollution and material loss during the rainy season. Solution: Kunwei supplied three units of LSY-250 Spiral Screw Conveyors (9 meters length). Result:
- The fully enclosed system eliminated 99% of dust waste.
- The universal joint allowed easy connection to their existing local silos without modifying the foundation.
- The client reported a 20% increase in batching speed due to the consistent feed rate.
Frequently Asked Questions (FAQ)
Q: Can I use the LSY conveyor for wet sand?
A: We do not recommend it. LSY is designed for dry powders like cement. Wet sand can pack and clog the tubular housing. For wet materials, our Shaftless Screw Conveyor is a better choice.
Q: How do I choose the right length?
A: The length is measured from the center of the inlet to the center of the outlet. Since the LSY is usually installed at an angle, you need to calculate the hypotenuse length based on your silo discharge height and the mixer inlet height. We can help you with this calculation.
Q: What maintenance does it require?
A: The LSY is low maintenance. Mainly, you need to check the gearbox oil level regularly and inspect the universal joint for tightness. The hanging bearings are designed for long-term use with minimal intervention.
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