Silica Sand Washing and Dewatering Machine
High-purity processing · Iron and clay removal · Low residual moisture
Silica sand washing and dewatering line · attrition scrubbing with fine dewatering
Core specifications
Feed size range0.1 – 3 mm
Capacity15 – 180 t/h
Final moisture6% – 12% (model dependent)
Motor power15 – 132 kW
Process focusAttrition scrubbing + dedicated dewatering
Silica Sand Washing and Dewatering Machine – Overview
The SMC silica sand washing and dewatering machine is engineered for the specialized requirements of high-purity silica sand production, where end uses such as glass manufacturing, foundry casting, and hydraulic fracturing proppant demand very low levels of clay, iron staining, and organic contamination alongside tightly controlled final moisture content.
The washing stage uses attrition scrubbing — vigorous particle-on-particle rubbing action within a dense sand slurry — to mechanically scour iron oxide coatings and clay films from individual sand grains, a more intensive cleaning action than typical aggregate washing since silica sand specifications are often far stricter than construction sand standards.
Following attrition scrubbing, a dedicated dewatering stage using a fine screen, dewatering spiral, or centrifugal dewatering unit reduces the sand's final moisture content to the low single-digit percentage range typically required for silica sand to be dried, bagged, or transported economically without carrying excess water weight.
Because silica sand often has tight particle size specifications for its intended application (a specific mesh range for foundry sand, another for frac sand, another for glass sand), the washing and dewatering process is designed to preserve the target gradation curve rather than degrading it through excessive attrition or losing critical size fractions to the overflow water.
Process water management is a significant consideration given silica sand's stringent cleanliness requirements; the system typically includes clarification and recycling of wash water to both reduce fresh water consumption and manage the fine tailings stream, which in high-volume operations can itself become a byproduct requiring proper handling or disposal.
Wear components in contact with the abrasive silica slurry — screens, spiral flights, pump linings, and scrubber components — use upgraded wear-resistant materials compared to standard sand washing equipment, since silica's high hardness accelerates wear significantly faster than the mixed mineral content of typical construction aggregate.
Typical applications include silica sand processing for glass manufacturing, foundry sand production, hydraulic fracturing proppant, and specialty sand products for water filtration and recreational applications, wherever purity and moisture specifications exceed standard construction sand requirements.
For producers targeting high-purity silica sand markets, the SMC silica sand washing and dewatering machine delivers the intensive cleaning and controlled moisture output that these demanding applications require.
Sanming Mining - Raising Industry Standards
Company Profile
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Sanming is an international Mining Machinery Equipment Supplier that integrates R&D, Manufacturing, and Sales of Rock Crushing&Screening equipment, as well as Sand Making, Sand Washing, and Grinding equipment. Sanming has passed ISO9001 quality system certification.
As
China Silica Sand Washing And Dewatering Machine Manufacturers and
Wholesale Silica Sand Washing And Dewatering Machine Factory, our equipments are widely used in the fields of Sand and Gravel Aggregate processing, Mining, and Construction Waste Resource utilization.
"Sanming" brand equipments are not only distributed in nearly 30 provinces in China, but also exported in large quantities to multiple countries in Central Asia, the Middle East, South America and Africa, and has received unanimous praise from users. Our main production base is located in Qidong (Shanghai Pudong New Area Industrial Park). We warmly welcome your visit to our factory.
- 200+
Number Of Products
- 20,000
Factory Area
- 500w
Annual Sales
- 40%
Annual Export Ratio
How It Works – Working Principle
Attrition Scrubbing
Dense sand slurry undergoes vigorous particle-on-particle scouring action.
Iron & Clay Removal
Scrubbing mechanically strips oxide coatings and clay films from grains.
Gradation-Preserving Process
Washing intensity is tuned to avoid degrading target mesh specifications.
Fine Dewatering
Screen or centrifugal dewatering reduces final moisture to low single digits.
Applications & Industries
Glass Manufacturing
Producing high-purity silica sand meeting glass industry iron/clay limits.
Foundry Sand Production
Clean, precisely graded sand for metal casting mold and core applications.
Hydraulic Fracturing Proppant
Washed and dewatered sand meeting frac sand purity and strength specs.
Specialty Filtration Sand
Clean silica sand for water filtration and recreational surface applications.
Suitable For Various Mining Applications
Equipment Production Line
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Selection Guide – Choose the Right Model
SSW-300
Feed: 0.1–2 mm · Capacity: 15–40 t/h
Entry model for smaller specialty silica sand operations.
SSW-500
Feed: 0.1–2.5 mm · Capacity: 35–80 t/h
Balanced model for standard silica sand processing lines.
SSW-800
Feed: 0.1–3 mm · Capacity: 70–130 t/h
Higher-capacity option for larger glass or frac sand plants.
SSW-1000
Feed: 0.1–3 mm · Capacity: 110–180 t/h
Top-capacity model for major silica sand production facilities.
Comparison – Silica Sand Washing vs Standard Construction Sand Washing
Key Performance Indicators
Iron/clay removal thoroughness · Gradation precision retained · Equipment cost-effectiveness (relative)
Silica-Grade Washing Advantage
- Meets strict purity specifications
- Precisely controlled final moisture
- Wear parts built for abrasive silica duty
Standard Construction Sand Washing
- Lower equipment cost
- Sufficient for general aggregate use
- Simpler process requirements
Key Components – Built to Last
Attrition Scrubber Cell
Dense-slurry chamber providing intensive particle-on-particle scouring.
Fine Dewatering Screen
High-frequency screen reducing sand moisture before stockpiling.
Centrifugal Dewatering Unit
Optional unit for achieving the lowest final moisture specifications.
Wear-Resistant Slurry Pumps
Upgraded linings to handle continuous abrasive silica slurry duty.
Water Clarification System
Clarifies and recycles wash water to manage tailings and reduce fresh water use.
Gradation Control Instrumentation
Monitors particle size distribution to protect target mesh specifications.
Installation & Commissioning
Foundation
Reinforced foundation for scrubber, dewatering screen, and pump systems.
Water Clarification Setup
Install and commission water recycling and tailings management systems.
Process Calibration
Tune scrubbing intensity and dewatering settings to target specifications.
Commissioning
Staged start-up with sampling to confirm purity and moisture targets are met.
Maintenance Schedule & Wear Trend
Wear/Component Life Over Time (Relative)
Silica's abrasiveness accelerates wear on pumps and screens — monitor more closely than standard construction sand equipment.
Daily Checks
- Slurry pump performance
- Dewatering screen moisture output
- Attrition scrubber operation
Weekly Checks
- Inspect pump linings for wear
- Check screen panel condition
- Sample product for gradation compliance
Monthly
- Full purity and moisture lab testing
- Inspect scrubber cell wear components
- Check water clarification system performance
Yearly
- Complete wear part inspection and replacement
- Full water system service
- Process audit against target specifications
Quality You Can Trust
Why choose Sanming
Sanming is a professional manufacturer of R&D, manufacturing and sales
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01. Design & Customization
The company has an experienced and highly skilled R&D team, which is capable of providing customers with customized equipment solutions to meet the needs of different customers
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02. Advanced Facilities
The company has invested in and introduced a series of advanced production equipment, such as high-precision CNC machine tools, automated welding equipment, etc. These equipment features high efficiency, precision and stability, which can ensure the quality of products and production efficiency
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03. Reliable Quality
The company always gives top priority to product quality. It uses high-quality raw materials and components, and through strict screening and inspection, it ensures the quality and performance of products. At the same time, the company also conducts long-term tracking and services for products, promptly solves the problems encountered by customers during the use process, and improves customer satisfaction
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04. Service Integrity
The company has established a complete after-sales service system to provide customers with comprehensive services. This includes equipment installation and debugging, operation training, maintenance, technical consultation, etc., to ensure that customers can use the equipment smoothly and maximize its benefits
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05. Cost Control
The company effectively controls product costs by optimizing the production process, reducing raw material procurement costs, and improving production efficiency. On the premise of ensuring product quality, it can provide customers with competitive prices and enhance their market competitiveness
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06. Brand Influence
After years of development, the company has established a good brand image in the mining equipment manufacturing industry and has won the trust and praise of customers
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07. Convenient Transportation
The company is only 50 kilometers away from Shanghai Yangshan Port, making the transportation of goods and exports very convenient
Frequently Asked Questions (FAQ)
1. Why does silica sand require more intensive washing than construction sand?
Applications like glass manufacturing and foundry casting have far stricter purity requirements for iron staining, clay content, and organic material than typical construction sand standards, requiring attrition scrubbing rather than simple rinsing.
2. What is attrition scrubbing?
It is a process where dense sand slurry undergoes vigorous particle-on-particle rubbing action, mechanically scouring iron oxide coatings and clay films from individual sand grains.
3. What final moisture content can this equipment achieve?
Depending on the model and dewatering configuration, final moisture content typically ranges from 6% to 12%, suitable for economical transport, bagging, or subsequent drying.
4. How is target gradation preserved during washing?
Washing intensity and dewatering settings are tuned specifically to avoid excessive attrition that could degrade the sand's target mesh specification for its intended application.
5. What industries use this equipment's output?
Glass manufacturing, foundry sand production, hydraulic fracturing proppant, and specialty filtration sand are the primary markets served by this high-purity processing equipment.
6. How is process water managed given silica's cleanliness requirements?
A water clarification and recycling system reduces fresh water consumption while managing the fine tailings stream generated by intensive washing.
7. Why do wear parts need to be upgraded for silica sand processing?
Silica's high hardness accelerates wear on pumps, screens, and scrubber components significantly faster than the mixed mineral content typical of construction aggregate.
8. What testing verifies the sand meets purity specifications?
Regular sampling and laboratory testing for iron content, clay content, and gradation compliance should be performed to verify the product meets target specifications.
9. Can this equipment process sand for multiple end-use specifications?
Yes, though scrubbing intensity and dewatering settings may need adjustment when switching between applications with different purity or gradation requirements.
10. What is the typical capacity range?
Capacity ranges from 15 to 180 t/h depending on the model, covering small specialty operations through major silica sand production facilities.
11. How does frac sand processing differ from glass sand processing?
Frac sand specifications emphasize grain strength and roundness alongside purity, while glass sand specifications focus heavily on iron content limits; both benefit from this equipment's attrition scrubbing and precise dewatering.
12. What warranty is offered?
A standard 12-month warranty covers manufacturing defects, with upgraded wear components covered separately given their accelerated wear in silica service.
13. Do you provide specification compliance support?
Yes, our engineers can help design the washing and dewatering process to target specific industry purity and moisture specifications.
After-Sales Support & Services
Specification Compliance Support
Engineering assistance targeting glass, foundry, or frac sand purity standards.
Abrasion-Resistant Spare Parts
Upgraded pump linings and screen panels stocked for silica service.
Water Recycling System Design
Support designing clarification and tailings management systems.
24/7 Technical Support
Ongoing assistance for high-purity silica sand processing operations.
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