Volumetric Screw Feeder for Bulk Material Metering
Volumetric screw feeder for cost-effective bulk material metering. Suitable for cement, fly ash, grain, and chemical powders with ±2% accuracy.
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Introduction
Volumetric Screw Feeder for Bulk Material Metering
Screw Feeders
High-Precision Screw Feeding Systems for Cement Plants and Bulk Material Handling
Reliable and Accurate Bulk Material Feeding Solution
Manxing Screw Feeders are designed to provide continuous, uniform, and accurately controlled feeding of powder, granular, and fine bulk materials from silos, hoppers, and storage bins into downstream processing equipment.
Unlike standard screw conveyors that primarily transport materials, screw feeders are engineered to precisely meter material flow, ensuring stable production and consistent process performance.
Installed beneath hoppers or silos under flooded conditions, the screw feeder continuously meters bulk materials by optimizing screw diameter, pitch, rotational speed, and flight geometry. Variable-speed drives further improve feeding accuracy for automated production lines.
Our screw feeders are widely used in cement plants, dry mortar production lines, fly ash handling systems, mining operations, chemical plants, power stations, and other bulk material handling industries where accurate material dosing is essential.
Key Features & Advantages
Accurate Material Metering
Optimized screw geometry delivers stable, repeatable and highly accurate feeding rates for continuous production.
Continuous Stable Operation
Ensures uninterrupted material flow with excellent feeding consistency for automated production systems.
Anti-Bridging Design
Variable-pitch screws and multi-screw configurations minimize bridging, rat-holing, and material blockage.
Heavy-Duty Construction
Manufactured from carbon steel, stainless steel or wear-resistant alloys for demanding industrial applications.
Fully Enclosed Structure
Prevents dust leakage, minimizes material contamination, and provides a cleaner working environment.
Variable Speed Control
Compatible with VFD systems for precise adjustment of feeding capacity according to production demand.
Low Maintenance
Simple mechanical structure allows convenient inspection, servicing, and long-term reliable operation.
Custom Engineering
Every feeder is individually designed according to material properties, capacity requirements, and installation conditions.
Types of Screw Feeders
Variable Pitch Screw Feeder
The screw pitch gradually increases from the inlet toward the discharge, ensuring uniform material withdrawal and stable feeding performance.
AdvantagesUniform material withdrawal
Stable feeding performance
Reduced material bridging
Improved feeding accuracy
Tapered Diameter Screw Feeder
Features a gradually increasing screw diameter along the inlet section to improve material intake and feeding capacity.
AdvantagesHigher feeding capacity
Improved material flow
Suitable for large storage hoppers
Ideal for dense bulk materials
Mass Flow Screw Feeder
Combines variable pitch with a tapered center shaft to achieve true mass flow discharge and eliminate stagnant material zones.
AdvantagesTrue mass flow discharge
Prevents rat-holing
Reduces material segregation
Ideal for cohesive materials
Twin Screw Feeder
Two synchronized screws operate beneath wide hopper openings to provide high-capacity and uniform material extraction.
AdvantagesLarge feeding capacity
Uniform material extraction
Excellent anti-bridging performance
Suitable for wide silos and hoppers
Live Bottom Screw Feeder
Multiple screws create an active discharge floor beneath large storage bins, ensuring continuous discharge across the full hopper width.
AdvantagesPrevents material arching
Eliminates dead zones
Suitable for difficult-flowing bulk materials
Continuous full-width hopper discharge
Inclined Screw Feeders
Manxing also provides inclined screw feeders for applications requiring simultaneous feeding and elevation of bulk materials.
Inclined screw feeders are commonly used to transfer materials from storage hoppers to mixing equipment, packing machines, grinding systems, and pneumatic conveying systems.
To maximize conveying efficiency, inclined feeders are equipped with short-pitch screw flights, tubular housings, heavy-duty gear reducers, and variable-speed drives.
Customized designs allow installation angles up to 45° depending on material characteristics and production requirements.
Typical Applications
Mixing Equipment
Packing Machines
Grinding Systems
Pneumatic Conveying Systems
Bulk Material Transfer
Main Components
Feed Hopper
Receives bulk material from silos or storage bins and supplies the feeder continuously.
Screw Shaft & Flights
Precisely designed helical flights ensure accurate material metering and smooth conveying.
Trough or Tubular Housing
Fully enclosed housing minimizes dust emissions while protecting the screw assembly.
Drive Unit
Includes electric motor, gear reducer, and flexible coupling for reliable power transmission.
End Bearings & Inspection Covers
Ensure smooth operation while allowing convenient maintenance and routine inspection.
Optional Control System
Variable Frequency Drive (VFD) and PLC control enable automated feeding regulation and process integration.
Technical Specifications
| Item | Specification |
|---|---|
| Screw Diameter | 100–800 mm |
| Capacity | 1–500 m³/h |
| Screw Length | Customized |
| Installation Angle | 0–45° |
| Drive Type | Gear Motor / Cycloidal Reducer |
| Speed Control | Fixed Speed or Variable Frequency |
| Housing Type | U-Trough or Tubular |
| Material | Carbon Steel, Stainless Steel, Wear-Resistant Steel |
* Custom dimensions and capacities are available upon request.
Optional Configurations
Material Options
Carbon steel, stainless steel, and wear-resistant steel construction are available to suit different operating environments.
Wear Protection
Hardfaced screw flights and wear-resistant liners extend service life when handling abrasive materials.
Automation Options
Variable Frequency Drives (VFD), PLC automatic control, and level sensors enable intelligent production control.
Special Configurations
Explosion-proof motors, inspection doors, and dust-proof sealing systems are available for special applications.
Applications
Cement Plants
Used for feeding cement powder, raw meal, clinker dust, fly ash, gypsum, limestone powder, and slag powder.
Dry Mortar Plants
Suitable for continuous dosing of cement, sand, lime powder, mineral fillers, and various additives.
Mining Industry
Handles iron ore powder, copper concentrates, mineral powders, coal dust, and other bulk materials.
Power Plants
Widely used for fly ash feeding, pulverized coal feeding, and desulfurization powder feeding systems.
Chemical Industry
Suitable for chemical powders, fertilizers, pigments, industrial additives, and other fine bulk materials.
Bulk Material Handling
Ideal for silos, storage bins, batching systems, mixing plants, and automated production lines requiring accurate feeding.
Suitable Materials
Cement/Fly Ash/Limestone Powder/Gypsum/Slag/Coal Powder/Bentonite/Silica Powder/Sand/Clay/Lime Powder/Mineral Powder/Dry Mortar/Chemical Powders
Customized wear-resistant screw designs are available for highly abrasive, cohesive, and difficult-flowing bulk materials.
Why Choose Manxing Screw Feeders?
Manxing designs every screw feeder based on actual material characteristics rather than adopting standard configurations. Our engineering team evaluates bulk density, flowability, particle size, moisture content, storage geometry, and required feed rate to deliver a customized feeding solution for every project.
Whether you require a compact screw feeder for a cement grinding station or a multi-screw live bottom feeder for large silos, we provide reliable, efficient, and fully customized solutions tailored to your production requirements.
Our Advantages
Customized engineering for every project
High feeding accuracy and stable flow control
Heavy-duty industrial construction
Excellent sealing for dust-free operation
Low operating and maintenance costs
PLC and DCS automation integration
Extensive experience in cement, mining, and bulk material handling industries
Professional technical support and worldwide project experience
Need a Customized Screw Feeding Solution?
Contact our engineering team today for equipment selection, technical consultation, engineering drawings, and competitive quotations. We will provide the most suitable screw feeder solution based on your material characteristics and project requirements.
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Case
Industrial Steel Silo EPC Solutions | Manxing's Proven Engineering Excellence
Manxing has successfully delivered comprehensive steel silo systems for cement, clinker, fly ash, and coal storage applications. Our extensive project portfolio demonstrates advanced engineering capabilities, innovative design, and consistent superior performance across diverse industrial sectors.
Silo System
Manxing is a leading EPC contractor specializing in bulk material storage and conveying systems, providing customized steel silo solutions for cement, fly ash, coal, clinker, slag, and other industrial materials worldwide.
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