In the construction and mining industries, the quality of sand plays a crucial role. Raw sand after extraction usually contains impurities such as clay, silt, fine dust, or organic matter. Without proper treatment, these impurities can significantly affect the durability and quality of construction projects.
The Spiral Sand Washer is a specialized machine designed to wash, classify, and improve sand quality.
Below, we will explore in detail its working principle, structure, technical features, and the reasons why this equipment is increasingly preferred.
What is a Spiral Sand Washer?
A Spiral Sand Washer (also known as a screw sand washer) is an industrial machine used to remove impurities, clay, and fine particles from natural or crushed sand.
It operates based on the spiral motion of the screw shaft combined with a continuous water flow to thoroughly wash and transport sand.
Compared with bucket-type sand washers or traditional spiral washers, the screw sand washer offers higher capacity, better water savings, and ensures superior cleanliness of the final product.
Common applications include:
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Sand and gravel mining sites
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Ready-mix concrete plants
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Brick and block production facilities
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Large-scale infrastructure projects
Working Principle
The Spiral Sand Washer works through the combination of water flow and spiral motion:
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Raw sand is fed into the water tank.
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The screw shaft rotates continuously, moving sand along the trough.
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During movement, sand is vigorously mixed with water. Lighter impurities such as clay, silt, and organic matter are carried away with the wastewater.
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Clean sand is pushed upward by the screw and discharged at the outlet.
This principle ensures:
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Cleaner sand with reduced clay and dust content
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Water-saving performance thanks to recycling systems
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High washing capacity, suitable for large-scale production
Main Components
A standard Spiral Sand Washer typically consists of:
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Water tank: where raw sand is fed and washed
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Spiral screw shaft: the core part that stirs and conveys sand
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Motor and gearbox: provide rotation power, usually a 3-phase heavy-duty motor
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Machine frame and body: robust steel structure, vibration-resistant
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Water supply and drainage system: ensures continuous washing and discharge of impurities
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Discharge outlet: releases clean sand after washing
Its simple design makes the machine easy to operate, maintain, and durable in long-term use.
Applications
The Spiral Sand Washer is widely used in:
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Construction industry: Washing sand for high-quality concrete and mortar
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Mining industry: Removing impurities from sand and gravel to increase value
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Ready-mix concrete plants: Ensuring sand meets strict quality standards
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Building materials production: Producing cleaner sand for bricks, blocks, concrete pipes
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Environmental treatment: Used in wastewater treatment plants to separate silt and solids
Outstanding Technical Features
Compared with other sand washing machines, the Spiral Sand Washer has many advantages:
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Simple structure, stable operation: Compact design, easy to install and operate in various environments
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Isolated bearings: Bearings are separated from water and materials, preventing contamination, rust, and premature failure
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Adaptable to different working conditions: Suitable for mining, concrete plants, building material factories, and wastewater treatment
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High washing efficiency with minimal sand loss: Ensures clean output that meets strict construction standards
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Long service life, fewer wear parts: Made from durable materials for continuous operation
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Low maintenance, reduced operating costs: Less downtime and fewer repairs
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Superior cleaning performance: Effectively removes impurities, silt, and fine dust
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Robust design: Heavy-duty steel frame, vibration resistant, long-lasting
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Water-saving design: Can be combined with water recycling systems for eco-friendly operation
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Large processing capacity: Meets medium to large-scale project requirements
Technical Specifications
Technical specifications vary depending on the model and manufacturer, but typically include:
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Screw diameter: 600 – 1200 mm
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Screw length: 3 – 12 m
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Motor power: 2 – 18.5 kW
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Capacity: 20 – 130 tons/hour
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Material: Alloy steel, wear-resistant steel with anti-rust coating
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Transmission: Electric motor + gearbox
| Model | Screw Diameter (mm) | Capacity (t/h) | Motor Power (kW) | Weight (kg) |
|---|---|---|---|---|
| FG-60 | 600 | 20 | 3 | 2550 |
| FG-75 | 750 | 50 | 5.5 | 3820 |
| FG-100 | 1000 | 75 | 7.5 | 4870 |
| FG-120 | 1200 | 95 | 11 | 6900 |
| FG-150 | 1500 | 130 | 18.5 | 8800 |
Comparison with Standard Screw Conveyors
Many people confuse the Spiral Sand Washer with a screw conveyor. However, they are completely different machines:
| Criteria | Spiral Sand Washer | Screw Conveyor |
|---|---|---|
| Function | Wash and clean sand | Convey bulk materials (powder, grain, dry sand, cement, etc.) |
| Working environment | Operates in water | Operates in dry environment |
| Structure | Includes water tank, water system | Only trough and screw shaft |
| Application | Mining, clean sand production | Bulk material handling in various industries |
| Processing capability | Removes impurities and cleans sand | Only conveys, does not clean |
Clearly, the Spiral Sand Washer is a specialized machine for sand washing in mining and construction, and cannot be replaced by a conventional screw conveyor.
Contact Us
With many years of experience in supplying industrial equipment and construction materials, we confidently provide:
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High-quality Spiral Sand Washers at competitive prices
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Free technical consultation to choose the right model for your needs
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On-site warranty and maintenance for stable operation
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Installation support and operator training for your technical team
👉 If you are looking for an efficient, durable, and cost-saving sand washing solution, contact us today for detailed consultation and the best quotation.
