Screw Feeder & Conveyor Applications

Screw conveyors and feeders are widely used in bulk material handling operations to efficiently move bulk solids within industrial processes. Known for their reliability and adaptability, they support both continuous and controlled flow in applications across industries like food, chemicals, cement, plastics, and mining. Typical applications include silo and hopper emptying, dust collection systems, baghouse filters, and integration with mixing, batching, dosing, and other bulk solids processing equipment.

Silo, Hopper Emptying with Screw Conveyor

In bulk solids handling systems, managing the discharge of bulk material from storage units is a critical step in maintaining process efficiency. In these systems, screw conveyors are installed under silos, hoppers, or storage bins to ensure consistent and controlled flow of materials. They help avoid problems such as clogging, sudden surges, or uneven feeding that can disrupt downstream operations. These conveyors deliver the required amount of powder or granules to equipment like conveyors, mixers, or dosing systems. Their use is especially critical in processes that demand stable input rates and precise material handling.

Dust Collection Systems, Baghouse Dust Filters

Effective dust management is essential in bulk material handling operations to ensure workplace safety, protect equipment, and maintain product quality. Dust collection systems, including baghouse filters and jet pulse filters, are designed to capture fine airborne particles generated during material handling and processing. These systems prevent dust from escaping into the environment or accumulating inside the facility. Screw conveyors installed under the dust collectors automatically discharge the captured dust, ensuring continuous operation and eliminating the need for manual removal. This system enables a cleaner, safer, and more efficient production environment.

Mixing, Batching, Dosing Systems

Precise control over bulk material input plays a key role mixing, batching, and dosing applications to ensure consistent product quality and formulation accuracy. Screw feeders are commonly used in these systems to regulate the flow of bulk solids into mixers, weighing hoppers, or other process equipment.

In volumetric feeding, the screw feeder delivers a consistent volume of material based on the screw’s speed and geometry. This method is ideal for processes where an approximate amount is sufficient and material density is relatively uniform.

Gravimetric feeding, on the other hand, relies on real-time weight measurements to deliver exact quantities of material. Load cells or weighing scales are used to monitor the material being delivered, allowing the system to adjust the screw speed automatically for precise dosing.

Both feeding methods enable accurate mixing and batching of powdered and granular materials across industries like food, chemicals, plastics, and construction.

Bulk Solids Processing Equipment Feeding / Discharging with Screw Conveyors

Efficient handling of bulk solids is critical in many industrial processes to maintain productivity and product quality. Screw conveyors are commonly employed to feed or discharge materials in a controlled and continuous manner, ensuring smooth operation of downstream equipment.

Applications that rely on screw conveyors include:

• Feeding raw materials into crushers and grinders

• Batching and mixing powders or granules in production lines

• Transferring materials to packaging or filling machines

• Discharging processed materials from silos or hoppers

• Handling abrasive or fragile materials with minimal degradation

Other Industries and Applications of Screw Feeders & Conveyors

Screw feeders and conveyors are versatile equipment widely used across numerous industries to efficiently handle, transport, and control the flow of bulk materials in different processes.

• Chemical and Process Technology: Used to accurately transfer and dose powdered chemicals in manufacturing processes.

• Power Plants: Handle ash, coal, and other bulk materials for combustion and waste management.

• Cement and Lime Industry: Convey raw materials and additives during cement and lime production.

• Food Processing: Transport ingredients and additives while maintaining hygiene standards.

• Paper Industry: Move powdered fillers and coatings used in paper production.

• Flour Mills: Transfer flour and grain products between processing stages.

• Iron and Steel Foundries: Handle abrasive materials like sand, slag, and metal powders safely.

• Dust Collection Systems: Collect and transport dust and fine particles for disposal or recycling.

• Painting Machines: Feed powdered paint materials consistently to spray systems.

• Grain Handling: Convey grains and seeds during storage, cleaning, and processing.

• Agricultural Applications

Handled Materials by Screw Conveyors

Category Materials

Construction & Minerals Cement, Calcium Carbonate, Fly Ash, Marble Powder, Glass Powder, Ash

Plastics & Fuels Plastic Pellets, PVC, Coal, Coal Dust

Grains & Cereals Wheat, Flour, Barley, Corn, Seed, Grain Cereals

Animal Feed & Agriculture Feed, Chickpea, Bean, Sesame, Rice, Rice Flour, Cotton Seed

Nuts & Dried Fruits Dried Fruit, Nuts, Peanut, Almond, Sunflower Seed, Chestnut

Food & Spices Coffee Grain, Coffee Powder, Sugar, Salt, Spice

Wood & Biomass Sawdust

Application Gallery

(resim ekle)

Discover our amazing products today

Discover our amazing products today
ALL PRODUCTS
Join our newsletter to stay up to date on features and releases.

By subscribing you agree to with our Privacy Policy and provide consent to receive updates from our company.

COMPANY
RESOURCES
FOLLOW US
© 2024 Polimak. All rights reserved. Design & Development by brain.work
Contact Us
These valves are typically actuated by pneumatic actuators and are used to automatically open and close the product flow to discharge material to downstream equipment.
Installed below silos or hoppers, these valves are used for maintenance operations of equipment such as rotary valves, screw feeders, etc., that are positioned below the butterfly valve.
These valves are typically actuated by pneumatic actuators and are used to automatically open and close the product flow to discharge material to downstream equipment.
In this design, the butterfly valve is sandwiched between two flanges. Rubber sealing at both faces of the valve provides a tight seal between the flanges and the wafer butterfly valve.
One side of the valve has a bolted flange connection, while the other side features a built-in short pipe designed for fixing a flexible sleeve.
These valves have bolted flange connections on both sides, making them suitable for installation on silos, hoppers, screw feeders, and similar applications.
Bulk tanker trucks or open trucks can be filled with powdered materials delivered within FIBC bags. These systems generally consist of bulk bag discharging station, mechanical or pneumatic conveyor and loading bellow. Big bag discharge station transfers the bulk solid from big bag to conveying system. Conveying system transfers it to truck loading area. And loading bellow is used to fill tanker truck without any dust emission. Since truck loading operations are done within limited time, high capacity big bag discharge systems and bulk material conveying systems are used. For short distances, screw conveyors are preferred to transfer material from big bag discharge station to truck loading chute. For long conveying distances, pneumatic conveying systems provide better service. There may exist a storage hopper or silo above bulk truck loading bellow to compensate material flow between inlet and outlet. Bulk bag discharge and truck filling systems have automatic control system that monitors product level in truck and operates all equipment accordingly. Optional weighing system can be added to measure the amount of material that is filled to truck.
Big bag discharge systems can deliver dry bulk solids in powder and granular form to weighing and batching systems. The loading hopper of the weighing system should remain full during dosing and batching. Big bag discharge systems can monitor the product level in the loading hopper and maintain a constant level automatically. Depending on the dosing speed and conveying distance, mechanical conveying systems or pneumatic loading systems may be used. Dust collectors can be employed to prevent dust emissions during hopper loading, especially for materials with high dust content.
Dry bulk packaging systems are used to fill powdered or granular materials into bags, drums, jars, sacks, etc. Bulk materials delivered in big bags must be transferred to packaging machines without interruption. The loading hopper of the packaging system should remain full during the filling and packaging process. Big bag discharge systems can monitor the product level in the loading hopper and maintain a constant level automatically. Depending on the packaging speed, mechanical conveying systems or pneumatic loading systems can be selected. Dust collectors can be used to prevent dust emissions during hopper loading, especially for materials with high dust content.
Mixer automation systems are used to mix dry bulk solids according to specific recipes. Raw materials delivered in FIBC bags can be transferred to mixing units through a combination of conveying equipment and bulk bag discharge systems. Depending on the type of application, pneumatic conveying or mechanical feeding systems can be used to fill mixers. Big bag discharge stations can be manufactured with built-in dosing systems. The amount of raw material to be loaded into the mixer is automatically controlled with the help of a weighing and dosing system. Dust collectors can be used to prevent dust emissions during the mixer filling process.
Bulk material stored in big bags can be automatically filled into small bags. Big bag discharge systems come with optional built-in bag filling units. For low filling capacities, these units are installed below the big bag discharge hopper, providing a practical and cost-effective solution. Both big bag discharging and bag filling operations can be handled by a single, compact system. For higher bag filling needs, bag filling machines are installed near the bulk bag discharge stations. Pneumatic conveying systems or mechanical conveyors can be used to transfer bulk material from the FIBC bag discharge station to the bag or sack filling system.
Mechanical conveyors can be used for silo loading from big bag discharge stations. Screw feeders, bucket elevators, rotary valves, or chain conveyors are connected to big bag discharge stations to fill silos. The selection of conveying equipment directly depends on the conveying distance, height, transferred material, and capacity. Bucket elevators are preferred for high silos, while screw feeders are preferred for shorter silos and short distances. The big bag discharge system can be installed on top of the silo for faster filling. In this case, rotary valves or butterfly valves are better choices as they provide simple flow control. Dust collection systems may be required depending on the dust content of the bulk solid. During silo loading, air content in the silo escapes to the atmosphere and carries some dust along with it. Vacuum fans and jet filters in dust collectors prevent dust emissions into the environment. The collected dust is sent back to the silo, thus preventing product loss.
Pneumatic conveying systems installed after bulk bag discharge units transfer bulk material through conveying pipelines to fill silos. This configuration is useful in applications where high transfer rates and long conveying distances are needed. In production lines where raw materials are stored in warehouses far from storage silos, bulk bag discharge stations can be installed close to the warehouses, and pneumatic conveying systems are used to fill silos from long distances. This design reduces the need for forklifts and cranes for bulk material transfer on the production site and increases overall efficiency.

Pneumatic conveying systems used for silo loading utilize blower pumps or compressors. Motor power, pipeline diameter, and equipment selection depend on the type of bulk material, transfer distance, silo height, and transfer capacity. Level sensors, jet filters, and other equipment are installed on storage silos to ensure the proper operation of the silo filling system.
Pneumatic conveying systems installed after bag dump units transfer bulk material through pipelines to fill silos. This configuration is ideal for applications requiring high transfer rates and long conveying distances. In production lines where raw materials are stored in warehouses far from storage silos, bag dump stations can be installed close to warehouses, allowing pneumatic conveying systems to transport materials over long distances. This design reduces the excessive use of forklifts and cranes for bulk material transfer within the production site, improving overall efficiency.

Pneumatic transfer systems used for silo loading utilize blower pumps or compressors. Motor power, pipeline diameter, and equipment selection depend on factors such as the type of bulk material, transfer distance, silo height, and transfer capacity. Level sensors, jet filters, and other equipment are installed on storage silos to ensure the proper operation of the silo filling system.
Mechanical conveyors can be used for silo loading from bag dump stations. In this configuration, screw feeders, bucket elevators, rotary valves, or chain conveyors are connected to bag dump stations to fill silos. The selection of conveying equipment depends on factors such as conveying distance, height, material properties, and capacity. Bucket elevators are preferred for high silos, while screw feeders are ideal for shorter silos and short distances. Bag dump systems can be installed on top of the silo for faster filling. In such cases, rotary valves or butterfly valves are better choices as they provide simple flow control.

Dust collection systems may be required depending on the dust content of the bulk solid. During silo loading, air inside the silo escapes to the atmosphere, carrying dust particles with it. Dust collectors equipped with a vacuum fan and jet filter capture airborne dust. The collected dust is returned to the silo, preventing product loss and ensuring a cleaner environment.
The inlet skirt is an optional feature designed to extend the lifespan of the flexible connector sleeve. Its upper portion is attached to the outlet port of the upstream equipment and extends down into the bin activator’s inlet port. The primary function of the inlet skirt is to serve as a protective shield, safeguarding the flexible connector seal from wear and damage.
A vibratory motor is externally mounted to the bin activator. When powered, the motor generates vibrations that facilitate a steady flow of dry bulk materials within the system. Depending on the application requirements, one or two vibratory motors can be installed externally.
To accommodate a bin activator, the cone of a silo must be shorter than usual, resulting in a wider outlet. A flange supplied with the bin activator is separately welded to the silo’s outlet, slightly above the opening, at the production site. Once installed, the vibrating bin discharger is securely bolted to the flange, ensuring a stable and reliable connection.
Special spring suspension links and an engineered polymer seal work together to create a flexible connection between a vibrating bin discharger and the equipment positioned above it.

The proper design and installation of the polyurethane seal prevent it from slipping off and ensure a secure seal, eliminating the risk of dry bulk material leakage. Additionally, the seal offers high stress resistance and long-term durability, withstanding stresses caused by motor vibrations, pressure conditions, and other operational factors.

Externally installed spring suspensions provide full resilience to the vibrations of the cone head. They ensure that the generated vibrations affect only the cone itself rather than the upstream equipment structure.
An internally tapered, conical-shaped baffle plate is positioned at the center of the bin activator’s diameter. The baffle is rigidly attached to the equipment body using structural steel components. It facilitates bulk material flow from upstream equipment by directly inducing vibrations into the material.

A secondary deflector plate reduces the weight of the bulk material in the lower portion of the bin activator by acting as a wedge beneath the material, directing it around the areas adjacent to the cone’s surface.

Polimak baffle plates are available in various configurations, including convex and cone plates, and in different angles (15°, 30°, 45°, or even 60°) depending on the flow characteristics of the handled bulk material and the specific application requirements.