Sand Washing & Classification Solutions
Spiral Sand Washer
In mining and quarry operations, obtaining clean sand with low mud content is key to meeting construction industry standards. ZME delivers Screw Sand Washers specifically engineered for efficient cleaning, desliming, and dewatering of fine materials.
What is
a Screw Sand Washer?
In aggregate and sand production lines, the Spiral Sand Washer / Screw Sand Washer is vital equipment for ensuring final material quality. Its primary functions are to perform simultaneous washing, desliming, and dewatering of sand. It offers an efficient solution for removing impurities and dust adhering to sand grains, delivering a high-quality product that meets the strict standards of the construction and concrete industries.
The machine operates on the principle of settling velocity differences of particles within a fluid. Through the slow rotation of a robust spiral screw shaft, the material is agitated and scrubbed against itself to release impurities, while a constant water flow carries away unwanted fine materials through the overflow weir. Operational flexibility is enhanced by the use of highly wear-resistant, replaceable polyurethane blades, ensuring washing efficiency remains optimal even when handling highly abrasive materials at large capacitiesr.
How It Works?
ZME delivers a competitive edge through precise mechanical engineering to produce clean sand with minimal fine material loss:
Screw Shaft & Polyurethane Blades: Utilizes high-quality polyurethane materials on the spiral edges to provide exceptional wear resistance and simplify component replacement.
Isolated Bearing Design: The bearing system is positioned outside the water tank to prevent damage from water, mud, and sand intrusion, ensuring an extended operating lifespan.
Operating on the principle of differential settling velocities (sedimentation) in a fluid, the sand feed enters the water-filled settling tank. The slowly rotating screw shaft agitates and tumbles the material, causing the sand grains to scrub against one another to strip away mud and surface impurities. As the material is agitated, a constant inlet of water carries dust and light impurities toward the weir plate to be discharged through the overflow channel. Meanwhile, the heavier sand grains are pushed upward by the spiral flighting toward the discharge end. During this ascent along the inclined deck, water naturally drains back down, ensuring the discharged sand is thoroughly dewatered and clean.
Innovations in the stable transmission system and the robust tank design ensure that the ZME Screw Sand Washer excels in maintaining consistent sand gradation. This machine stands out as an essential final solution in construction sand production lines, silica processing, and aggregate washing for various large-scale infrastructure projects.
Applications of
the Spiral Sand Washer
The ZME Spiral Sand Washer / Screw Sand Washer is the ideal solution for final cleaning stages to maximize the market value of sand products at mine or quarry sites. From secondary crushing outputs to the final washing phase, this machine guarantees intensive impurity separation to produce high-quality fine aggregates. Once the material is processed through the spiral rotation, dirt and silt are discharged through the overflow channel, while clean sand is ready for distribution to stockpiles with minimal moisture content.
In the construction sector and concrete aggregate production, this equipment is highly effective for automatically improving sand gradation to meet stringent technical specifications. ZME designs these machines to support the needs of the silica sand, river sand, and crushed sand washing industries, ensuring that every grain of material is free from clay coatings and fine dust that could otherwise weaken concrete bonding strength.
It is perfectly suited for various types of fine materials requiring high purity levels, such as construction sand, quartz, and fine mineral ores. Featuring an isolated external bearing design safe from water submersion and wear-resistant polyurethane blades, the ZME Screw Sand Washer serves as the smartest solution to minimize operational maintenance costs while guaranteeing superior finished product quality for your business.
In every primary crushing line, the Mining Feeder serves as the primary gateway, handling the heaviest Run-of-Mine (ROM) material loads. The ZME Vibrating Grizzly Feeder is specifically engineered with a heavy-duty structure to absorb the impact of large boulders while simultaneously pre-screening fine materials. This solution ensures your primary crusher operates more efficiently by only processing materials that require size reduction, while significantly extending the lifespan of wear components.
Advantages of
ZME Spiral Sand Washer
The ZME Spiral Sand Washer is engineered for superior fine material cleaning performance to achieve maximum purity in the final product. Utilizing stable spiral rotation technology and a precise water-silt separation system, this machine maximizes aggregate market value by thoroughly removing contaminants before the stockpiling stage. With its robust tank design and advanced isolated bearing system, ZME delivers high washing capacity, reliable operational stability, and an exceptionally long component lifespan to handle everything from construction sand to abrasive industrial materials.
- High Production Efficiency & Maximum Pre-Screening
ZME optimizes the feeding mechanism to ensure maximum output combined with a lighter crusher workload:
Fine Material Separation: The specialized grizzly bar design prevents material clogging and separates undersized particles or waste rock early in the process. This increases total plant output and prevents premature wear on crusher components.
Stable & High-Volume Flow: Engineered with a wide working surface for the continuous transport of large bulk materials, ensuring daily primary production targets are met with high efficiency. - Robust Construction & Advanced Vibration System
Innovations in the ZSW series guarantee mechanical reliability even under the most extreme mining conditions:
High-Integrity Body Structure: The feeder frame features exceptional rigidity and high impact resistance against large Run-of-Mine (ROM) boulders, providing maximum structural stability during heavy operations.
Dual Eccentric Shaft Design: Generates a smooth, stable, and powerful linear vibration. Equipped with thin-oil lubrication on the bearings to significantly extend operating lifespan and reduce heat friction.
Wear-Resistant Lining: The internal surfaces of the feeder trough are lined with high-grade wear-resistant plates, minimizing component replacement costs caused by harsh rock abrasion. - Operational Flexibility & Smart Maintenance
ZME prioritizes precise flow control and effortless routine maintenance access:
Flexible Speed Regulation (Optional): Available with an electromagnetic speed control system or a Variable Frequency Drive (VFD) to adjust feeding volume instantly based on live production capacity requirements.
Adjustable Installation Angle & Gaps: The installation angle can be adjusted between 0° to 15°, and the gaps between grizzly bars can be flexibly tuned, giving you full control over the specifications of the pre-screened material.
Easy Inspection & Low Maintenance: The ruggedized design minimizes operational downtime. The system is purpose-built for long-term operations with minimal periodic maintenance requirements.
- High Washing Efficiency & Precision Classification
ZME optimizes the washing mechanism to ensure premium sand quality with minimal loss of fine materials:
Maximum Cleaning & Silt Removal: The single or dual-spiral design ensures intensive material agitation, effectively stripping away clay and organic impurities adhering to sand grains. This enhances gradation quality and improves bonding strength in concrete applications.
Natural Dewatering System: Designed with an inclined deck that allows water to drain naturally backward as the sand is pushed upward, ensuring the final output has low moisture content and is ready for immediate further processing. - Robust Construction & Advanced Protection Systems
Innovations in the XL series ensure mechanical reliability even under continuous, highly abrasive working conditions:
External Isolated Bearing Design: The transmission and bearing assemblies are completely isolated from the water and material zones. This innovation drastically eliminates damage from water and sand intrusion, ensuring long-term structural and operational stability.
Powerful & Smooth Transmission: Equipped with a high-quality gearbox that delivers high torque with low operational noise, ensuring stable spiral rotation even under heavy material loads.
Wear-Resistant Components (Polyurethane): The spiral flights feature high-grade polyurethane blades that offer significantly better abrasion resistance than standard steel, minimizing wear parts replacement costs. - Operational Flexibility & Smart Maintenance
ZME prioritizes precise product quality control and effortless routine maintenance access:
Adjustable Weir Plate: The overflow channel’s weir plate is height-adjustable to control water volume and flow velocity, allowing operators to fine-tune how much fine material is retained or discharged.
High-Integrity Tank Structure: The machine body is fabricated from thick, heavy-duty steel plates resistant to corrosion and water pressure, preventing deformation over years of heavy operation.
Easy Inspection & Low Maintenance: The straightforward, heavy-duty design minimizes operational downtime. By prioritizing internal component protection, this system stands as one of the lowest maintenance-cost-per-ton washing solutions in its class.
Technical parameters
Spiral Sand Washer Parameters
| Model | Maximum Feed Material Size (mm) | Rotor Working Diameter (mm) | Rotor Speed (rpm) | Production Capacity (t/h) | Motor Power (kW) | Weight (kg) | Machine Dimensions (mm) |
| VI600 | 60 | 610 | 1200–2300 | 120 | 160 | 6500 | 3670×1821×2100 |
| VI800 | 75 | 813 | 1200–2000 | 180 | 200 | 7900 | 4037×2070×2375 |
| VI1000 | 80 | 1050 | 1200–1800 | 240 | 250 | 12000 | 4890×2386×2678 |
| VI1200 | 90 | 1260 | 1200–1500 | 360 | 320 | 16000 | 5300×2856×3168 |