Industrial Screw Conveyor Systems for Bulk Material Handling
Industrial screw conveyors are designed for continuous, efficient handling of bulk materials such as powders, granules, and semi-solids. With a compact structure and enclosed design, they ensure stable conveying performance, reduced dust emission, and low maintenance in various industrial applications.
YuanJing provides customised screw conveyor solutions based on your material characteristics, capacity requirements, and plant layout. From horizontal to inclined or vertical configurations, each system is engineered for reliable operation and long service life. Widely used in food, chemical, construction, and mining industries, can be used in conjunction with various industrial sieve machines.YuanJing helps improve handling efficiency while reducing overall operating costs.
What is a Screw Conveyor?
A screw conveyor is a continuous conveying device that uses rotating screw blades to forcefully move materials; it is primarily used to convey various powdered, granular, and small lump materials. Screw conveyors feature a simple structure, excellent sealing performance, convenient operation, low power consumption, and versatility, capable of conveying materials horizontally, at an incline, or vertically. In a screw conveyor, the material does not move relative to the screw blades but is pushed toward the discharge end as the blades rotate. This enables sealed conveying, reducing material spillage and waste. Screw conveyors are cost-effective, have high conveying capacity, and operate smoothly and quietly, allowing them to perform special tasks that other conveying equipment cannot accomplish.
Working Principle
When the screw shaft rotates, material is driven forward by the combined action of gravity and friction between the material and the trough wall. Under the pushing force of the rotating screw blades, the material moves continuously along the bottom of the conveyor. This motion is similar to a non-rotating nut translating along a rotating screw. The primary conveying force is generated by the tangential and axial components of the blade rotation, which push the material upward and forward.
Structural Design & Material Movement
To maintain the screw shaft in a favorable tensile condition, the drive unit and discharge outlet are typically positioned at the same end, while the inlet is located near the opposite tail end. During operation, the rotating blades continuously push the material forward. The resistance preventing the material from rotating with the screw includes its own weight and friction against the conveyor casing, ensuring stable axial movement instead of rotation.
Blade Types & Mechanical Support
Screw blade design varies based on material characteristics, including solid (continuous flight), ribbon, and paddle types, to optimize conveying performance. A thrust bearing is installed at the discharge end to absorb axial forces generated during operation. For longer conveyors, intermediate hanger bearings are required to support the shaft, maintain alignment, and ensure stable, long-distance conveying performance.
Parts of a Screw Conveyor
A screw conveyor mainly consists of three parts: the screw body, the inlet, and the outlet. The core component is the screw blade mounted on the central shaft. The motor drives the screw blade to rotate, thereby conveying materials.
- Drive Unit (Motor & Gearbox): Provides stable rotational power and torque, ensuring continuous and efficient material conveying performance.
- Screw Shaft & Helical Flight: The rotating shaft with welded or formed flights moves materials along the conveyor length.
- Trough or Tube Housing: Encloses the screw assembly, preventing material leakage and protecting the system from external contamination.
- Bearing System (End & Intermediate Bearings): Supports the screw shaft, reduces friction, and maintains alignment during operation.
- Sealing System: Prevents dust leakage and material spillage, ensuring clean and safe operation in industrial environments.
- Inlet Hopper & Outlet Discharge: Designed for smooth material feeding and controlled discharge, improving overall handling efficiency.
- Inspection & Maintenance Ports: Allow easy access for cleaning, inspection, and routine maintenance to minimise downtime.
Types of Screw Conveyors
Based on the eight configurations shown in the figure, a brief description is provided below:
- Inclined large hopper: A large-capacity hopper combined with an inclined conveyor, suitable for bulk feeding via manual loading or ton bags, reducing the frequency of feeding. Ideal for powders and granules.
- Motor top mount: The motor is mounted at the top to prevent material contamination of drive components, making it suitable for applications with hygiene or dust-proof requirements.
- Vertical standard: Vertical lifting with a small footprint, designed for space-constrained environments and suitable for short-distance vertical conveying.
- Parallel transfer: Horizontal layout with a simple and stable structure, suitable for point-to-point conveying within workshops or connecting equipment.
- Inclined mobile: Equipped with casters for mobility, featuring inclined feeding; suitable for shared use across multiple workstations or temporary production lines.
- Irregular top mount: Customised for special installation angles or spaces, addressing integration challenges with irregularly shaped workstations.
- U horizontal: U-shaped trough structure, facilitating cleaning and maintenance; suitable for continuous conveying of standard powders.
- Custom large hopper cover: Large hopper with a sealed cover, providing dust and moisture protection, suitable for environments with high requirements or materials with volatile properties.
Features of Screw Conveyor
Screw conveyors provide efficient, enclosed bulk material handling with stable conveying performance, high capacity, and flexible
customisation. Designed for powders, granules, and semi-solid materials, they ensure minimal material loss,
low maintenance requirements, and reliable operation across diverse industrial applications.
- Simple Structure & Easy Maintenance
Optimised mechanical design reduces complexity, enabling quick maintenance, lower downtime, and long-term operational reliability. - Large Capacity & Wide Application Range
High conveying capacity supports diverse industries, handling powders, granules, and bulk materials efficiently. - Strong Environmental Adaptability
Dustproof and waterproof configurations ensure stable performance under harsh, humid, or dusty industrial conditions.
- Smooth Conveying Without Blockage
Continuous screw motion prevents material buildup, minimising jamming risks and ensuring consistent conveying performance. - Wide Material Compatibility
Handles various materials across temperature and humidity ranges, with minimal limitations on physical properties. - Customizable Design Options
Flexible configurations available to meet specific process requirements, ensuring optimal performance for different applications.
Technical Specifications
Capacity varies depending on material density and flow characteristics,Length and power can be customised based on project requirements,Speed is adjustable according to conveying conditions.It can be paired with various vibrating sifters (e.g., tumbler screening machine, detergent powder screening machine, industrial salt sifters, chili powder sieve machine, and flour sifter machine) to create an integrated production workshop that combines conveying and screening operations.
| Model | Diameter (mm) | Capacity (TPH) | Length (m) | Power (kW) | Speed (RPM) |
| LS100 | 100 | 1 – 3 | 1 – 10 | 1.1 – 2.2 | 60 – 90 |
| LS200 | 200 | 5 – 15 | 2 – 15 | 2.2 – 5.5 | 50 – 80 |
| LS300 | 300 | 15 – 40 | 3 – 20 | 4 – 11 | 40 – 70 |
| LS400 | 400 | 30 – 70 | 5 – 25 | 7.5 – 15 | 30 – 60 |
| LS500 | 500 | 60 – 120 | 5 – 30 | 11 – 22 | 20 – 50 |
| LS600 | 600 | 100 – 200 | 6 – 35 | 15 – 30 | 20 – 45 |
Applications
Food Industry
Salt， Milk powder， Starch， Grain， Coffee powder
Chemical Industry
Calcium carbonate， Soda ash， Fertiliser， Plastic pellets， Resin， Titanium dioxide
Cement & Construction
Cement， Sand， Fly ash， Lime， Gypsum， Mortar
Mining & Minerals
Coal， Iron ore， Copper concentrate， Silica sand， Slag
Customization
Screw conveyors can be configured to match different materials, capacities, and installation conditions. A proper design ensures stable conveying performance, reduced wear, and long-term reliability.
- Material Selection: Carbon steel or stainless steel (304/316) is chosen based on corrosion resistance, hygiene standards, and the nature of the material being handled.
- Diameter & Capacity: The screw diameter directly affects conveying capacity. Larger diameters are suitable for higher throughput and bulk handling requirements.
- Length & Layout: Equipment length is customised according to plant layout, supporting flexible installation in limited or complex spaces.
- Inclination Angle: Systems can be designed for horizontal, inclined, or vertical conveying, depending on process requirements and site conditions.
- Screw & Flight Type: Shafted screws are suitable for dry materials, while shaftless designs handle sticky or fibrous materials. Flight types such as continuous, ribbon, or paddle are selected based on material flow characteristics.
- Drive & Control: Motor and gearbox configurations can be fixed or variable speed to ensure stable operation under different working conditions.
- Inlet, Outlet & Sealing: Feeding and discharge points can be arranged as needed, with sealing options available to reduce dust leakage and meet environmental or sanitary requirements.
- Voltage & Motor Standard: according to your local power requirements
This flexible design approach allows screw conveyors to adapt to a wide range of industrial applications while maintaining efficient and consistent material handling.
Why Choose Us as Your Screw Conveyor Supplier
Choosing the right supplier is critical to ensuring reliable performance, consistent quality, and long-term cost efficiency. A professional manufacturer not only provides equipment, but also delivers tailored solutions based on real production needs.
Customised Solutions： Each screw conveyor is designed according to material characteristics, capacity, and site layout to ensure optimal performance and integration.
Stable Manufacturing Quality： Strict production standards and quality control ensure durable structure, precise fabrication, and reliable operation in demanding environments.
Wide Industry Experience： Proven applications across food, chemical, construction, and mining industries allow for practical and efficient design solutions.
Flexible Configuration Options： Support for various materials, screw types, drive systems, and sealing requirements to meet different working conditions.
Efficient Delivery： Standardised production processes and project management help shorten lead times and ensure on-time delivery.
Technical Support： From selection to installation, professional guidance is provided to ensure smooth operation and reduced downtime.
Vibrating Screen and Conveyor Machine Manufacturer & Supplier
Built for precision screening, reliable performance, and flexible industrial applications,
Yuanjing rotary vibrating screens are trusted by customers worldwide.
Global Project Experience
Yuanjing products are exported to 50+ countries and regions, serving industries including food, chemicals, pharmaceuticals, mining, and new energy.
Strong Manufacturing Capability
Advanced production lines with laser cutting, CNC machining, automatic welding, and strict quality inspection ensure consistent product quality.
Accurate & Stable Separation
Optimized vibration design delivers even material flow, high screening accuracy, and stable long-term operation.
Customized Screening Solutions
Yuanjing offers flexible configurations in diameter, mesh size, deck layers, and material options to fit your exact process requirements.
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