खनन उपकरण गाइड: What Equipment Should You Use for Mud Purification in Water Conservancy, Coal Preparation Plants and Environmental Engineering? A Complete Guide to Fine Sand Recycling Machines

The fine sand recovery machine is a recovery device carefully designed by absorbing advanced foreign technology and combining it with China’s actual conditions. It is widely used in hydropower, glass factories, fine aggregates in building materials, recovery of coarse coal slime in coal preparation plants, and environmental protection projects (such as slurry purification). Its working principle is that the slurry sand-water mixture is delivered to the high-pressure mud-sand separator; the fine sand concentrated by centrifugal classification is supplied to the dewatering screen through the sediment discharge nozzle. After dewatering on the dewatering screen, the fine sand is effectively separated from the water, while a small amount of fine sand and mud is returned to the washing tank via the return box. When the liquid level in the washing tank is too high, it is discharged through the outlet. The recovered material on the dewatering screen has a weight concentration of 70%-85%. The fineness modulus can be adjusted by changing the pump speed, slurry concentration, overflow water flow, or replacing the sand discharge nozzle, thereby completing the three functions of washing, dewatering, and grading. Why choose the fine sand recovery machine? First, it is carefully designed by absorbing advanced foreign technology and combining it with domestic conditions; it has a reasonable structure and is convenient to use. Second, the dewatering screen recovers materials with a weight concentration of up to 70%-85%, ensuring high recovery efficiency, reducing fine sand loss, and improving the quality of finished sand and economic benefits. Third, the fineness modulus can be flexibly adjusted to meet different finished product requirements by changing the pump speed, slurry concentration, overflow water flow, or replacing the sand discharge nozzle. Fourth, it integrates the three functions of washing, dewatering, and grading, simplifying the process flow. Fifth, it has a wide range of applications, covering hydropower, glass factories, building material sand and gravel, coal preparation plants, and environmental slurry purification, among other fields. The fine sand recovery machine is mainly used for washing sand and gravel aggregates and purifying slurry in hydropower projects, recovering fine glass sand in glass factories, recovering fine aggregates in the building materials industry, recovering coarse coal slime in coal preparation plants, slurry purification in environmental projects, and in fine sand recovery stages of various manufactured sand production lines and aggregate washing lines. People who need fine sand recovery machines include hydropower project contractors, procurement and operation departments of glass factories, building material sand and gravel production enterprises, procurement departments of coal preparation plants, environmental engineering companies, EPC contractors of sand production lines, equipment dealers and stockists, and overseas infrastructure and mining project buyers. In what situations should a fine sand recovery machine be selected or replaced? Traditional sand washing production lines experience serious fine sand loss and need to recover fine sand to improve economic efficiency. Slurry needs to be purified to meet environmental engineering requirements; coal preparation plants need to recover coarse coal slime to improve resource utilization; glass plants need to recover fine glass sand to reduce raw material waste; old sand washing equipment loses a large amount of fine sand, and the finished sand grading is unreasonable, so it needs to be upgraded to a fine sand recovery machine; export projects require fine sand recovery machines that are suitable for overseas voltage and efficient fine sand recovery conditions. How to choose a fine sand recovery machine? Step 1: Confirm the processing capacity and select the corresponding model within the 5-260 t/h range according to the production line capacity requirements; Step 2: Confirm the separator specifications and choose a 250 to 500×2 separator according to material particle size and recovery requirements; Step 3: Confirm the dewatering screen size and select an 800×1800 to 2000×6000mm dewatering screen based on processing volume and site space; Step 4: Confirm the pump power and choose an 11kW to 22×2kW pump according to processing capacity and conveying distance; Step 5: Confirm the fineness modulus adjustment method, which can be achieved by changing pump speed, changing slurry concentration, adjusting overflow water volume, or replacing the sand outlet nozzle; Step 6: Confirm the installation foundation, which needs to be installed on a flat and sturdy concrete foundation with anchor bolts; Step 7: Confirm the material of wear parts and select high manganese steel, wear-resistant alloy, polyurethane, or ceramic materials based on material abrasiveness; Step 8: Confirm environmental protection and automation configuration, which can be equipped with a dust removal system, slurry purification system, and central control system.

Fine sand recovery machine models and parameter table

Model	Separator specifications	Dewatering screen size (mm)	Dewatering screen power (kW)	Pump model	Pump power (kW)	Processing capacity (t/h)	Dimensions (L×W×H mm)
WS8018	250	800×1800	0.75×2	2/3	11	5-10	2200×1400×2150
WS9020	300	900×2000	1.1×2	3/4	15	10-20	2500×1400×2300
WS1225	350	1200×2500	2.2×2	3/4	15	20-30	3000×1700×2300
WS1530	350×2	1500×3000	3.0×2	3/4	15×2	50-80	3100×2000×2500
2WS1530	350×2	1500×3000	3.7×2	3/4	15×2	50-100	3100×2000×2800
WS1840	350×2	1800×4000	3.7×2	3/4	15×2	100-130	4200×2300×2800
2WS1840	350×2	1800×4000	3.4	3/4	15×2	100-150	4550×2300×2800
WS2050	500×2	2000×5000	3.7×4	3/4 or 4/6	18.5×2	150-200	5200×2500×3100
2WS2060	500×2	2000×6000	3.7×4	2/3	22×2	200-260	6500×2500×3100

General technical parameter table

Parameter	Specification
Type	Fine sand recovery machine
Processing capacity	5–260 t/h
Dewatering screen recovered material weight concentration	70%–85%
Core functions	Washing, dewatering, classification, slurry purification, coarse coal slime recovery
Fineness modulus adjustment method	Change pump speed, change mortar concentration, adjust overflow water volume, replace sand outlet nozzle
Applicable Scenarios	Hydropower, glass factories, fine-grained building materials and aggregate, coarse coal slime recovery in coal preparation plants, and environmental protection projects (such as slurry purification)

Dimension drawing and key dimensions: `[Image: /images/fine-sand-recycling-machine-dimension-drawing.webp]`

Material Table

Component	Standard Material	Optional Material	Description
Water Tank/Frame	High-strength carbon steel	Stainless steel, wear-resistant steel plate	Supports material and water, needs to be rust-proof and wear-resistant
High-pressure Separator/Sand Outlet Nozzle	Wear-resistant alloy, polyurethane	Ceramics	Centrifugal classification concentration, high wear resistance
Dewatering Screen Mesh	High manganese steel, polyurethane	Stainless steel	Core screening component, wear-resistant and corrosion-resistant
Drive Shaft	40Cr/45# steel	Alloy steel	Quenched and tempered, smooth transmission
Bearing	Self-aligning roller bearing	Double-row cylindrical roller bearing	Withstands heavy load and impact
Water Pump	Wear-resistant slurry pump	Stainless steel pump	Transports sand-water mixture, high wear resistance
Motor	Full copper coil motor	Explosion-proof motor	Standard three-phase asynchronous motor
Control Box	Carbon steel/Stainless steel	Rainproof and dustproof type	Optional variable frequency speed control

Installation method: The fine sand recovery machine should be installed on a flat and solid concrete foundation, which must bear the equipment's own weight and the dynamic load during washing operations; during installation, ensure that the foundation's level meets requirements, and tighten the anchor bolts according to the specified torque; after the equipment is in place, adjust the level to ensure the dewatering screen is parallel to the motor shaft; the motor and water pump are connected by belt or direct coupling, adjust the belt tension or alignment precision to ensure smooth transmission; ensure the high-pressure separator, dewatering screen, and return box are properly sealed; the pump installation must ensure the inlet is unobstructed and the outlet piping is securely connected; after installation, perform a no-load test run to check whether the dewatering screen and pump are running normally and whether there is any abnormal vibration or noise; during the load test run, gradually increase the feed amount while observing the recovery effect and motor current to ensure it does not exceed the rated current; a dust removal system must be equipped to reduce dust pollution; a central control system can be optionally equipped for online monitoring and automatic control.

Application scenario table

Industry	Application	Recommended configuration	Key requirements
Hydropower	Sand and gravel aggregate washing, slurry purification	WS1530–2WS2060	Large processing capacity, high recovery efficiency, environmentally friendly
Coal preparation plant	Coarse coal slime recovery, coal slime water treatment	WS8018–2WS2060	Recovered material concentration 70%-85%, good classification effect
Glass factory	Fine glass sand recovery	WS1225–WS1840	Controllable particle size, pollution prevention
Building materials industry	Fine sand recovery of sand and gravel, sand washing	WS1530–2WS2060	Large fine sand processing capacity, high recovery rate
Environmental engineering	Slurry purification, tailings recovery	WS1530–2WS2060	Environmental compliance, resource recovery
Manufactured sand production line	Fine sand recovery, adjustment of finished sand grading	WS9020–2WS1840	Adjustable fineness modulus, reasonable grading

Note: The fine sand recovery machine has a processing capacity of 5-260 t/h, and the material weight concentration recovered by the dewatering screen is 70%-85%. The fineness modulus can be adjusted by changing the pump speed, altering the slurry concentration, adjusting the overflow water volume, or replacing the sand outlet nozzle. In explosive environments, an explosion-proof motor must be selected. For highly abrasive materials, it is recommended to use high manganese steel, wear-resistant alloy, polyurethane, or ceramic materials.

Selection Considerations (Compared with the Sand Washing Recovery Integrated Machine): The core differences between the fine sand recovery machine and the integrated sand washing recovery machine lie inintegration, application scenarios, and functional focus.The fine sand recovery machine focuses on fine sand recovery, slurry purification, and coarse coal slime recovery, widely used in hydraulic and hydropower projects, glass factories, fine aggregates for building materials, coarse coal slime recovery in coal preparation plants, and environmental protection projects. The weight concentration of materials recovered by the dewatering screen reaches 70%-85% and fineness modulus can be adjusted by changing the pump speed, slurry concentration, overflow water volume, and sand outlet nozzle. The integrated sand washing recovery machine combines sand washing and fine sand recovery in one unit, with a reasonable structure, small footprint, and high efficiency. It is particularly suitable for sand and gravel plants and concrete batching plants where traditional sand washing causes serious loss of fine sand, requiring control over sand volume in concrete and reduced cement usage. When selecting, if professional fine sand recovery, slurry purification, or coarse coal slime recovery is needed, the fine sand recovery machine is preferred; if an integrated sand washing recovery solution is needed, the integrated sand washing recovery machine is preferred.

## Technical FAQ

1. What is a fine sand recovery machine?

The fine sand recovery machine is a recovery device designed by absorbing advanced foreign technologies and adapting them to domestic conditions. It is widely used in hydraulic and hydropower projects, glass factories, fine aggregates for building materials, coarse coal slime recovery in coal preparation plants, and environmental protection projects (such as slurry purification).

2. What is the working principle of the fine sand recovery machine?

The slurry mixed with sand and water is pumped to the high-pressure desander. The fine sand concentrated by centrifugal classification is fed to the dewatering screen through the sedimentation sand nozzle. After dewatering on the screen, the fine sand is effectively separated from the water, and a small amount of fine sand and mud is returned to the washing tank through the return box. When the liquid level of the washing tank is too high, it is discharged through the outlet.

3. What models of fine sand recovery machines are available?

Fine sand recovery machine models include WS8018, WS9020, WS1225, WS1530, 2WS1530, WS1840, 2WS1840, WS2050, and 2WS2060.

4. What is the processing capacity of the fine sand recovery machine?

The processing capacity is 5-260 t/h, depending on the model. WS8018 is 5-10 t/h, and 2WS2060 is 200-260 t/h.

5. What is the weight concentration of material recovered by the fine sand recovery machine's dewatering screen?

The weight concentration of material recovered by the dewatering screen is 70%-85%.

6. How to adjust the fineness modulus of the fine sand recovery machine?

The fineness modulus can be adjusted by changing the pump speed, changing the slurry concentration, adjusting the overflow water volume, or replacing the sand outlet nozzle.

7. What functions can the fine sand recovery machine perform?

It can perform three functions: washing, dewatering, and grading.

8. In what scenarios is the fine sand recovery machine applicable?

It is suitable for hydropower projects, glass factories, fine aggregates in building materials, recovery of coarse coal slime at coal preparation plants, and environmental engineering (slurry purification, etc.).

9. What is the power of the water pump of the fine sand recovery machine?

The water pump power is 11 kW to 22×2 kW, depending on the model. WS8018 is 11 kW, 2WS2060 is 22×2 kW.

10. What is the size of the dewatering screen of the fine sand recovery machine?

The dewatering screen size ranges from 800×1800 mm to 2000×6000 mm, depending on the model.

11. What are the specifications of the separator of the fine sand recovery machine?

The separator specifications are 250 to 500×2, depending on the model.

12. Does the fine sand recovery machine require a foundation?

Yes. It needs to be installed on a flat, solid concrete foundation. The foundation must bear the equipment's own weight and the dynamic load during washing and selection operations, secured with anchor bolts.

13. What are the common faults of the fine sand recovery machine?

High-pressure separator blockage (due to excessive slurry concentration or foreign object obstruction), dewatering screen sand leakage (due to screen damage or insufficient tension), insufficient water pump flow (due to impeller wear or suction pipe air leakage), fineness modulus not meeting standards (due to improper pump speed or overflow water adjustment), motor overheating (due to overload or unstable voltage).

14. What are the wear parts of the fine sand recovery machine?

High-pressure separator, sand settling nozzle, dewatering screen mesh, pump impeller, etc. It is recommended to use high manganese steel, wear-resistant alloy, polyurethane, or ceramic materials.

15. Can the fine sand recovery machine be used in coal preparation plants?

Yes, it is suitable for recovering coarse coal slime in coal preparation plants, with a recovered material weight concentration of 70%-85%, and good classification effect.

16. Can the fine sand recovery machine be used in environmental protection projects?

Yes, it is suitable for sludge purification in environmental protection projects, achieving resource recovery and environmental compliance.

17. Can the fine sand recovery machine be customized?

Yes, the motor power, materials (high manganese steel/stainless steel/wear-resistant alloy/polyurethane/ceramic), motor configuration (explosion-proof motor), dust removal system, central control system, and variable frequency speed control can be customized.

18. Does the fine sand recovery machine comply with RoHS and REACH?

Standard equipment complies with RoHS and REACH regulations and does not contain SVHC substances of very high concern. Specifics shall be based on the product inspection report.

19. How to maintain the fine sand recovery machine?

Regularly check the wear of the high-pressure separator, sand settling nozzle, dewatering screen mesh, and pump impeller, and replace or adjust them in time; regularly check the bearing lubrication and replenish or replace grease; regularly check the pump operating status and pipeline sealing; regularly check belt tension; regularly check whether the foundation bolts and connecting bolts are loose; regularly clean accumulated material and debris in the water tank, separator, and screen mesh.

20. How to choose the model of the fine sand recovery machine?

Choose the model corresponding to 5-260 t/h according to the production line capacity requirements, select the separator specification based on the material particle size and recovery requirements, choose the dewatering screen size according to processing capacity and site space, select pump power according to processing capacity and conveying distance, and choose the fineness modulus adjustment method according to finished product requirements.

Technical FAQ

What determines screen capacity?

Feed rate, bulk density, moisture, particle-size distribution, deck area and required separation cut all affect capacity.

Do I need washing or only dry screening?

Choose washing when clay or adhered fines affect product quality. Confirm water source, recycling and discharge treatment.

Authoritative references

For standards and safety context, see ISO standards and the U.S. Mine Safety and Health Administration. Confirm the exact local requirements for your project.

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