Screw Sand Washer | Deep Cavity Spiral Sand Washing Machine for Fine Sand
High-Efficiency Desliming and Dewatering Equipment for Manufactured Sand and Fine Aggregate
20-130
Capacity (t/h)
≤10mm
Max Feed Size
≤8%
Moisture Content
≥95%
Desliming Rate
Product Overview & Core Advantages
The FG Series Screw Sand Washer (including single-screw and double-screw models) is a high-efficiency equipment independently developed by Shandong Hengtai Intelligent Manufacturing specially for fine sand desliming and dewatering. The equipment pushes materials forward through the rotation of screw blades, and completes washing, classification and dewatering operations simultaneously, which is widely used in manufactured sand production lines across Africa, Southeast Asia, South Asia, South America, Middle East, and Central Asia.
The equipment adopts a fully enclosed oil-bath transmission device and an adjustable overflow weir plate to ensure excellent sealing performance, high cleaning degree and good dewatering effect. It can handle fine sand materials (≤10mm), and the moisture content of finished sand is ≤8%. Suitable for scenarios with strict requirements on sand purity and humidity, it is an ideal supporting equipment for large and medium-sized sand making production lines.
Why Choose FG Series Screw Sand Washer?
Feature
FG Series Advantage
Customer Benefit
Deep Cavity Design
Extended retention time for thorough scrubbing
≥95% desliming rate, superior sand purity
Integrated Dewatering
Completes washing and dewatering in one unit
Moisture ≤8%, no additional dewatering equipment needed
Sealed Transmission
Fully enclosed oil-bath gearbox
Dust-proof, waterproof, extended bearing life
Adjustable Weir Plate
Precision control of water level and classification
Adaptable to varying feed conditions and sand specifications
Product Gallery
Operation Video
Technical Specifications & Model Selection Guide
Model
Screw Diameter (mm)
Capacity (t/h)
Motor Power (kW)
Weight (kg)
Max Feed Size (mm)
Dimensions (mm)
FG-60
600
20
3
2550
≤10
5200×1200×1800
FG-75
750
50
5.5
3820
≤10
6500×1500×2200
FG-100
1000
75
7.5
4870
≤10
7800×1800×2500
FG-120
1200
95
11
6900
≤10
9200×2200×2800
FG-150
1500
130
18.5
8800
≤10
11000×2600×3200
💡 Selection Guide:Small Sand Plants (20 t/h): FG-60 for small-scale manufactured sand operations or pilot projects. Medium Operations (50-75 t/h): FG-75 or FG-100 for medium concrete batching plants and construction sand processing. Large Sand Making Lines (95-130 t/h): FG-120 or FG-150 for large manufactured sand plants and highway projects.
Choose based on your sand production capacity and required dewatering efficiency. Contact our engineers for detailed process design.
Industry Application Solutions
Manufactured Sand Production
Pain Point: Crushed sand contains high stone powder and clay affecting concrete quality Solution: Deep cavity screw washing thoroughly removes fine impurities (≤75μm) from manufactured sand Result: Clean sand meeting GB/T 14684-2022 with low moisture (≤8%) for direct use Recommended: FG-100 or FG-120 for medium to large sand plants
Quartz Sand Purification
Pain Point: Quartz sand requires high purity and low iron content for glass and foundry use Solution: Intensive scrubbing in deep cavity removes surface contaminants and iron oxide coatings Result: High-purity quartz sand with SiO₂ content >99% after washing Recommended: FG-75 for quartz sand washing operations
Construction Sand Processing
Pain Point: River sand and manufactured sand require low moisture for concrete mixing and transportation Solution: Integrated dewatering achieves moisture ≤8% without additional equipment Result: Sale-ready sand with consistent quality, reduced cement consumption in concrete Recommended: FG-100 for construction sand suppliers
Technical Deep Dive: Deep Cavity Sand Washing Technology
7.1 Deep Cavity Design for Fine Sand
The FG series features an extended deep cavity design that increases material retention time compared to conventional sand washers:
Extended Scrubbing Zone: The deep screw cavity (30-40% deeper than standard designs) ensures fine sand particles remain in the washing zone longer, achieving ≥95% desliming rate.
Gentle Handling: Slow screw rotation (5-15 RPM) prevents degradation of fine sand particles while effectively scrubbing away clay and impurities.
Classification Function: The adjustable overflow weir plate allows precise control over fine particle classification, separating unwanted ultra-fine powder (stone dust) from valuable sand.
Dewatering Mechanism: As sand is conveyed upward by the screw, water drains back into the tank through the screw clearance, achieving initial dewatering to ≤8% moisture.
7.2 Sealed Oil-Bath Transmission System
Fully Enclosed Gearbox: The drive system operates in an oil bath, completely isolated from sand and water, preventing contamination and extending gear life to 5+ years.
Heavy-Duty Bearings: Oversized spherical roller bearings handle the axial and radial loads from screw rotation and sand load.
Adjustable Weir Plate: Manual or automated adjustment of overflow height controls the pool depth, allowing optimization for different sand fineness (finer sand requires deeper pool).
Operational Performance Data
Performance Metrics
≥95%
Desliming Rate
≤8%
Final Moisture
12-18
Months Blade Life
2000
Hours Oil Change Interval
Quality Assurance & Certifications
Manufacturing Standards: ISO 9001:2015 Quality Management System Certified
Quality Control Process
Screw Blade Material: High-manganese steel (Mn13) with hardness HB 180-220, work-hardening to HB 400+ during operation for extended wear life with fine sand.
Gearbox Testing: 4-hour no-load test followed by 8-hour load test to verify oil temperature, noise level (<75dB), and vibration.
Leak Testing: Tank and gearbox pressure-tested to ensure no leakage during continuous operation.
Sand Washing Test: Factory acceptance includes washing test with actual fine sand to verify capacity, desliming rate, and moisture content.
Certifications
ISO 9001:2015 - Quality Management System
Note: Our products are certified under ISO 9001 quality management system. We focus on delivering reliable equipment through rigorous quality control processes.
🛡️ Warranty & Service Commitment
Whole Machine Warranty: 1 year from date of commissioning
Wearing Parts: Screw blades and bearings are wearing parts excluded from warranty if damaged by processing abrasive materials beyond specifications
During Warranty Period: Free repair service for manufacturing defects; if repair fails, replacement with new component
Inquiry Methods: Online consultation, on-site inspection, factory visit available
Lifetime Technical Support: Available for all customers including remote troubleshooting
Installation, Commissioning & After-Sales Service
Pre-Sales Consultation
Process Design: We analyze your sand characteristics (fineness, mud content, clay type) to recommend optimal FG model and washing parameters
System Integration: Design recommendations for integration with sand making machines, screens, and dewatering equipment
Technical Drawings: Provision of foundation drawings, water supply/drainage layouts, and civil engineering requirements
In-Production Monitoring
Manufacturing Updates: Regular photo and video reports during equipment production
Shipping Coordination: Professional export packaging for sea transport to Africa, Southeast Asia, Middle East, and South America
Documentation: Commercial invoice, packing list, bill of lading, certificate of origin, ISO9001 certification
After-Sales Support
Installation: Remote video guidance or on-site engineer dispatch for commissioning with actual sand
Technical Documentation: Operation manual, maintenance handbook, electrical diagrams in English/Spanish/Russian
Continuous Support: 24/7 technical consultation and guaranteed spare parts supply
Customer Distribution
Our customers and distributors are located in: Africa, Southeast Asia, South Asia, South America, Middle East, Central Asia
Frequently Asked Questions (FAQ)
Q1: What is the difference between screw sand washer and screw stone washer?
Screw sand washer (FG series) is designed for fine sand (0-10mm) such as manufactured sand, quartz sand, and river sand, with deep cavity design for thorough desliming and dewatering (moisture ≤8%). Screw stone washer (XLZ series) is for coarse aggregate (5-75mm) like gravel and pebbles. FG series focuses on fine material washing with precise classification, while XLZ handles heavy-duty coarse stone scrubbing.
Q2: Why choose screw sand washer over wheel bucket sand washer for fine sand?
Screw sand washers provide superior dewatering (moisture ≤8% vs 15-20% for wheel washers) and better desliming for fine particles (0-10mm). The deep cavity design and longer retention time ensure thorough cleaning of fine sand. Wheel bucket washers are better for coarse sand (5-10mm) with less clay. For manufactured sand production requiring low moisture content, screw washers are preferred.
Q3: Can screw sand washer handle manufactured sand with high clay content?
Yes, FG series is specifically designed for high clay content fine materials. The deep cavity screw design provides intensive scrubbing action with ≥95% desliming rate. The adjustable overflow weir plate allows precise control of washing intensity. For extremely high clay content, we recommend double-screw models or combining with sand washing and dewatering integrated machine for best results.
Q4: What is the maintenance requirement for screw sand washer in continuous operation?
The fully enclosed oil-bath transmission requires oil level checks every 200 hours and oil change every 2000 hours. Screw blades made of high-manganese steel typically last 12-18 months for fine sand (longer than for coarse stone). Bearings are isolated from water and sand, significantly extending service life. We provide detailed maintenance schedules and spare parts kits for remote operations in Africa, Southeast Asia, and Middle East.
Complete Fine Sand Washing Production Line Solutions
As heavy industrial machinery, FG series screw sand washer requires professional selection based on your specific sand characteristics, clay content, and capacity requirements. We do not offer online purchasing—please contact us for technical consultation and customized quotation.
Tel/WhatsApp: +86 182 8866 4797 Email: ht6234nibin@gmail.com Address: Intelligent Equipment Manufacturing Industrial Park, High-Tech Zone, Linyi City, Shandong Province, China
