Introduction to Sand Screw Conveyor

A sand screw conveyor is a type of industrial equipment widely used for transporting sand and gravel in construction, mining, and agriculture.

This equipment provides a stable, continuous, and efficient conveying solution, saving labor costs and ensuring productivity.

Advantages of Sand Screw Conveyor

Sand screw conveyors have many notable advantages compared to other conveying and handling methods. Their benefits include the ability to handle large volumes of material, easy integration into automated systems, space saving, and the ability to operate in harsh environments.

Some outstanding advantages include:

• Continuous, stable conveying: Long-term operation without clogging.

• Handling wet sand and gravel: Still performs well with high moisture content materials.

• Suitable for narrow spaces: Compact design, easy to install in limited areas.

• Reasonable investment cost: Lower cost compared to belt conveyors and many other devices.

Types of Sand Screw Conveyor

There are various types of sand and gravel screw conveyors with different designs and applications, depending on the specific needs of the project and the material to be conveyed. Some common types include:

1. Shaftless Screw Conveyor

• Structure: This type has no shaft inside the screw, helping to avoid clogging when transporting viscous, sticky, or wet sand.

• Application: Commonly used for conveying sand, sludge, and flowable materials.

2. Double Screw Conveyor

• Structure: Consists of two screws operating in parallel or crossing each other, capable of transporting large volumes of material.

• Application: Widely used in production processes, stone mining, and sand & gravel handling.

3. Single Screw Conveyor

• Structure: Consists of a single screw. This is the simplest type.

• Application: Used for handling smaller quantities of material.

4. Tube Screw Conveyor

• Structure: The screw is enclosed inside a tube, forming a channel for material movement.

• Application: Used where sand and gravel must be protected from spilling into the environment.

5. Inclined Screw Conveyor

• Structure: Designed to transport materials up or down at an angle.

• Application: Commonly used to elevate sand and gravel from lower to higher positions or vice versa.

Structure and Working Principle of Sand Screw Conveyor

Main components:

1. Main shaft

2. Shaft bearing

3. Drive belt

4. Motor

5. Bearing frame

6. Sand discharge outlet

7. Screw blade

8. Blade frame

9. Support frame

10. Screw casing

11. Main frame

12. Casing edge

13. End cover plate

14. Shaft adjustment

15. Tension frame

Working principle:
The working principle of sand screw conveyors is similar to other types but they are divided into two main categories:

Type 1: Used to transport sand from one location to another based on the basic spiral principle. This type has high capacity and includes accessories to reduce impact and wear when conveying sand and gravel.

Type 2: Features a wide structure with multiple shafts working together, mainly for stirring and washing impurities in ores. The screw blades are partially submerged in water, stirring so that sand and ore particles dissolve and settle. They are then carried out of the water by the blades and delivered to another processing line.

Technical Specifications of Sand Screw Conveyor

• Screw diameter: 100 – 1000 mm

• Conveying length: 3 – 20 m

• Motor power: 2.2 – 22 kW

• Voltage: 380V – 50Hz

• Conveying capacity: 5 – 200 tons/hour

• Material: CT3 steel, stainless steel, or wear-resistant steel

• Design: Closed trough or round tube, horizontal, inclined, or vertical installation

• Applications: Concrete batching plants, construction material factories, mining industry

Investment Cost of Sand Screw Conveyor

When investing in a sand screw conveyor, aside from capacity and durability, cost is a primary concern. The investment cost is not fixed but depends on factors such as size, material, design, and working environment.

Key factors affecting cost:

• Screw size and length: Larger and longer conveyors cost more.

• Motor power: Higher capacity motors increase investment.

• Material: Standard steel is cheaper, while stainless or wear-resistant steel costs more.

• Working environment: Corrosive/harsh conditions require special materials, raising cost.

• Design type: Open trough, closed tube, horizontal, inclined, or vertical all differ in price.

• Customization: Special designs increase cost significantly.

• Installation cost: Includes labor, supports, and electrical systems.

• Initial maintenance: Lubrication, inspection, and early component replacement.

Contact Us

We are committed to providing valuable benefits when you contact us. With many years of accumulated experience and a team of knowledgeable experts, we are confident in offering you the best service and effective solutions for your needs.

When ordering from Super One, you will receive the following benefits:

• Free design consultation

• 2D drawings

• 3D drawings

• CO, CQ of materials

• Invoices and documents

• After-sales maintenance service

• Minimum 1-year warranty

• Competitive market pricing