XLZ Series Screw Stone Washer | Gravel & Stone Cleaning Equipment for Coarse Aggregate
Screw Gravel Washer for Pebble, Cobblestone and Crushed Stone Cleaning, Desliming and Classification
160-750
Capacity (t/h)
≤75mm
Max Stone Size
762-1118
Screw Diameter (mm)
ISO 9001
Certified Quality
Product Overview & Core Advantages
The XLZ Series Screw Stone Washer (also known as Screw Gravel Washer or Auger Stone Washer) is a piece of equipment that combines hydraulic flushing with screw conveying to clean, deslime, classify and initially dewater coarse stone materials and gravel. With mature structure and stable operation, it is widely used in sand and gravel aggregate production lines, construction aggregate processing and ore washing processes across Africa, Southeast Asia, South Asia, South America, Middle East, and Central Asia, serving as key equipment to improve the cleanliness of coarse aggregate for construction and infrastructure projects.
Available in both single-screw and double-screw configurations, the XLZ series adapts to various production scales from small quarries to large mining operations. The transmission system is isolated from water and stone, resulting in low failure rate and extended service life even when processing abrasive materials like granite, basalt and river pebbles.
Why Choose XLZ Series Screw Stone Washer?
Feature
XLZ Series Advantage
Customer Benefit
Coarse Material Handling
Processes stones up to 75mm, handles gravel and cobbles
Suitable for quarry aggregate preparation, not limited to fine sand
Processing Capacity
160-750 t/h with continuous operation
Meets medium to large aggregate production line requirements
8-12 months blade life even with abrasive stones, low maintenance
Clay Removal
Continuous screw scrubbing with water flushing
Effective desliming of clay-coated stones for high-grade aggregate
Product Gallery
Operation Video
Technical Specifications & Model Selection Guide
Model
Screw Diameter (mm)
Max Feed Size (mm)
Processing Capacity (t/h)
Motor Power (kW)
Configuration
XLZ-762
762
<60
160–220
30
Single-Screw
XLZ-914
914
<60
200–300
30
Single-Screw
XLZ-1118
1118
<75
500–750
45
Double-Screw
💡 Selection Guide:Small to Medium Quarries (160-300 t/h): XLZ-762 or XLZ-914 single-screw models are ideal for gravel yards with limited space and moderate clay content stones. Large Mining Operations (500-750 t/h): XLZ-1118 double-screw configuration provides higher capacity and better cleaning for high clay content gravel and cobblestones.
Choose single-screw for low clay content and limited site space. Choose double-screw for high clay content stones and large output requirements. Contact our engineers for customized recommendations based on your stone material analysis.
Industry Application Solutions
Construction Aggregate Production
Pain Point: Raw gravel and crushed stone contain high clay and soil affecting aggregate quality for concrete and asphalt Solution: Continuous screw scrubbing effectively removes clay coatings and surface impurities from stones (5-75mm) Result: Clean aggregate meeting construction standards (GB/T 14685), premium pricing for washed stone products Recommended: XLZ-914 for medium quarries, XLZ-1118 for large aggregate producers
Road & Highway Construction
Pain Point: Road base and surface courses require clean, graded stone free of clay lumps for stability Solution: Thorough desliming and classification ensures gravel meets highway engineering specifications Result: Consistent stone quality improves pavement durability and reduces maintenance Recommended: XLZ-762 or XLZ-914 for road construction projects
River Pebble & Cobble Processing
Pain Point: River pebbles are coated with silt and clay, requiring cleaning before use as decorative or construction stone Solution: Robust screw design handles rounded river stones up to 75mm with high washing efficiency Result: Clean decorative pebbles or high-grade construction aggregate from river deposits Recommended: XLZ-1118 double-screw for high-capacity river stone washing
Technical Deep Dive: Screw Stone Washer Working Principle
7.1 Working Principle - Coarse Aggregate Cleaning
The screw stone washer completes coarse material cleaning through the synergy of screw blade rotation conveying and water flow flushing:
Feeding Stage: Raw stones (gravel, pebbles, or crushed stone) enter the washing tank from the top and mix with water to form slurry. The tank inclination and water flow create initial stratification based on particle specific gravity.
Conveying & Scrubbing: The motor drives the screw shaft to rotate via reducer. Heavy-duty screw blades push stones forward along the tank while continuously lifting and turning them. This mechanical scrubbing action combined with high-pressure water flow removes clay coatings, soil, and surface impurities from coarse aggregate.
Desliming: Light impurities such as clay lumps, soil, and organic matter are suspended in water and discharged through the overflow port at the lower end of the tank. Clean water is continuously added to maintain washing efficiency for coarse stones.
Discharge: The cleaned stones are conveyed to the discharge end by the screw. The lifting action allows initial dewatering before discharge, resulting in clean, graded aggregate ready for construction use.
7.2 Key Components for Stone Washing
Heavy-Duty Screw Blades: Made of high-manganese steel (Mn13 or Mn18) with thickness 20-30mm to withstand abrasion from hard stones. Designed for processing gravel, pebbles, and crushed stone up to 75mm.
Reinforced Central Shaft: Heavy-duty carbon steel shaft with large-diameter bearings to handle the weight of coarse stones. Bearing housing positioned above water level to prevent contamination.
Abrasion-Resistant Tank: Thick steel construction with replaceable liner plates in high-wear zones. Designed for continuous operation with abrasive stone materials.
High-Torque Drive: Combination of motor and reducer with safety torque limiter to protect against overload from large stones or foreign objects.
Operational Performance Data
Performance Metrics
95%+
Clay Removal Rate
8-12
Months Blade Life
<5%
Failure Rate (Annual)
75mm
Max Stone Size
Quality Assurance & Certifications
Manufacturing Standards: ISO 9001:2015 Quality Management System Certified
Quality Control Process
Material Inspection: All steel plates and castings inspected for chemical composition. Manganese content in blades verified by spectrometer to ensure wear resistance.
Welding Quality: Tank body welds 100% visually inspected and 30% ultrasonic tested. Critical stress points undergo magnetic particle inspection for stone washing durability.
Dynamic Balancing: Screw assemblies dynamically balanced to ISO G6.3 standard to minimize vibration during heavy stone loading.
Load Testing: Factory acceptance test includes 8-hour continuous run with actual gravel and stones (not just sand) to verify capacity and cleaning effectiveness.
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, liner plates, and bearings are wearing parts excluded from warranty if damaged by processing extremely abrasive stones beyond design specifications
During Warranty Period: Free repair service for manufacturing defects; if repair fails, replacement with new machine or component
Inquiry Methods: Online consultation, on-site inspection, factory visit available
Lifetime Technical Support: Available for all customers including remote troubleshooting and maintenance guidance
Installation, Commissioning & After-Sales Service
Pre-Sales Consultation
Material Analysis: We analyze your stone characteristics (size distribution, clay content, abrasiveness) to recommend optimal model for gravel or pebble washing
System Integration: Design recommendations for integration with crushers, screens, and conveyors in your aggregate production line
Technical Drawings: Provision of foundation drawings, tank support structures, water supply/drainage layouts for coarse material washing systems
In-Production Monitoring
Manufacturing Updates: Regular photo and video reports during equipment production with quality inspection records
Shipping Coordination: Professional export packaging suitable for sea transport to Africa, Southeast Asia, Middle East, and South America
Documentation Support: Commercial invoice, packing list, bill of lading, certificate of origin, and ISO9001 quality certification
After-Sales Support
Installation & Commissioning: Remote video guidance or on-site engineer dispatch for foundation preparation, equipment positioning, and commissioning with actual stones
Technical Documentation: Complete operation manual, maintenance handbook, electrical diagrams, and spare parts catalog provided in English/Spanish/Russian
Continuous Support: 24/7 technical consultation, video troubleshooting assistance, and guaranteed spare parts supply chain
Performance Guarantee: Ensure normal operation and production capacity achievement upon commissioning. We verify processing capacity and stone cleanliness meet specifications
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: How does a screw stone washer differ from a wheel bucket washer for gravel cleaning?
Screw stone washers use spiral blades to convey and scrub coarse materials continuously, making them better for high clay content gravels and larger stones (up to 75mm). They provide more thorough cleaning of aggregate but use more water. Wheel bucket washers are better for finer gravels (0-10mm) with less clay. For quarry operations with mixed stones, cobbles and high clay content, screw washers are more effective for aggregate preparation.
Q2: Can the screw stone washer handle large river pebbles and cobblestones?
XLZ series can handle coarse materials up to 75mm, including river pebbles, cobblestones, granite chips, crushed stone, and coarse gravel. The large screw diameter (up to 1118mm) and robust blade design allow processing of mixed stone materials. For boulders larger than 75mm, we recommend pre-screening or using our jaw crusher first. The double-screw configuration is specifically designed for high-capacity, continuous operation with larger stone content in quarries.
Q3: What is the difference between stone washing and sand washing equipment?
Stone washing equipment (like XLZ screw stone washer) is designed for coarse aggregate (5-75mm) such as gravel, pebbles, and crushed stone, with heavy-duty construction to handle abrasive materials. Sand washing equipment (like ZDT series) is designed for fine aggregate (0-5mm) with features for fine sand recovery and dewatering. Stone washers focus on removing clay and soil from coarse stones for construction aggregate, while sand washers focus on cleaning fine particles and controlling moisture for concrete sand.
Q4: How easy is it to replace wear parts in remote quarry locations?
The screw blades are the main wear parts, made of high-manganese steel for extended life (typically 8-12 months depending on stone abrasiveness). Replacement is straightforward: remove the top cover, detach the old blade segments, and install new ones. Basic mechanical skills and standard tools are sufficient. We provide detailed maintenance manuals and video guides. For remote quarry operations in Africa, Southeast Asia, or South America, we recommend keeping a spare set of blades on-site, which we can include in the initial shipment or supply within 7-15 days.
Complete Aggregate Washing Production Line Solutions
Configuration Type
Applicable Raw Materials
Capacity Range
Core Equipment Configuration
Ideal For
Basic Stone Washing
Clean gravel, low clay content aggregate
160-220 t/h
Feeding Hopper → Vibrating Screen → XLZ Screw Stone Washer → Clean Stone Stockpile
As heavy industrial machinery, XLZ series screw stone washer requires professional selection based on your specific stone characteristics, clay content, and aggregate production 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
