What Is an En-Masse Conveyor (Buried Scraper Conveyor)? Structure, Working Principle, and Applications
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An en‑masse conveyor, or buried scraper conveyor, is a closed continuous bulk material handling equipment. It consists of a sealed casing, scraper chain, drive, tensioning device, and inlet/discharge ports. By using internal material friction, it moves powders, granules and lumps steadily. It is widely used in mining, cement, grain, power and chemical industries for its dust‑proof, reliable and low‑maintenance advantages.
An en masse conveyor, widely known as a buried scraper conveyor, is a highly reliable continuous conveying equipment designed for bulk materials such as powder, granules, small lumps, and mixtures. It is widely used in industrial production lines due to its stable performance, good sealing, and flexible layout.
Structure
The main structure of a buried scraper conveyor includes several key components:
- Sealed casing: Provides a closed conveying channel, effectively controlling dust and preventing material leakage.
- Scraper chain assembly: The core traction component, running inside the casing to drive material movement.
- Drive unit: Consists of a motor and reducer, providing stable power for the conveyor.
- Tensioning device: Maintains proper chain tension to ensure smooth operation and long service life.
- Inlet and discharge ports: Allow flexible feeding and unloading at multiple points along the conveyor.
Working Principle
The working principle is based on internal friction between material particles. When the scraper chain moves under the drive of the sprocket, the thrust and internal friction of the material overcome the friction between the material and the casing. Instead of being pushed individually by scrapers, materials form a continuous, stable flow and move forward as a whole. This mechanism enables efficient horizontal, inclined, or even vertical conveying in a compact space.
Applications
Buried scraper conveyors are widely applied in many industries:
- Mining, metallurgy, and coal: Conveying raw ore, coal powder, slag, and other abrasive materials.
- Cement and building materials: Transporting cement clinker, raw meal, sand, and fly ash.
- Chemical industry: Handling various chemical powders, granules, and non-corrosive bulk materials.
- Grain, feed, and food processing: Conveying grains, soybean meal, and other bulk materials in a clean, enclosed way.
- Power plants, ports, and environmental protection: Used for ash handling, material transfer, and waste treatment.
Conclusion
The en masse (buried scraper) conveyor is valued for its simple structure, good tightness, low maintenance, and high adaptability. It can effectively improve conveying efficiency, reduce dust pollution, and meet the needs of modern industrial automation. For enterprises handling bulk materials, it remains one of the most practical and cost-effective conveying solutions.
Buried scraper conveyor,en masse conveyor
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