دليل معدات التعدين: What Equipment Should You Use for Sand and Gravel Separation in Rivers, Reservoirs and Coal Yards, and Particle Classification in Various Industries? A Complete Guide to Rotary Screens and Screen Sand Machines

Drum screens and sand screening machines are core screening equipment widely used in rivers, reservoirs, coal yards for sand and stone separation, as well as in particle grading processes across domestic and international industries. Drum screens are suitable for particle grading processes in various industries at home and abroad, featuring simple installation and maintenance, adjustable operation parameters, and, compared with vibrating screens commonly used by most domestic manufacturers, have significant advantages such as smaller installation angle, less clogging, compact footprint, low noise, minimal dust pollution, smooth operation, high screening efficiency, large output, and convenient process layout. Sand screening machines are mainly suitable for sand and stone separation in rivers, reservoirs, and coal yards. Their working principle is: a loader scoops raw material into the feeding hopper, which is transported into the rotating screen. The rotating screen separates the raw material; sand is discharged from the sand outlet, and stones are discharged to the stone yard, completing the work. This series of sand screening machines has a simple, economical and practical structure, is easy to operate, and requires all machinery to be completely stopped before maintenance. Why choose these two types of equipment? Because they effectively solve issues of clogging, dust, and low efficiency in material screening, they are widely used in mining, building materials, chemical, coal, hydraulic engineering, and other industries, making them the preferred equipment for particle grading and sand-stone separation operations. When should these devices be chosen? They should be prioritized when multi-stage grading of granular materials is needed, when sand-stone separation is required in rivers, reservoirs, and coal yards, or when traditional screening equipment suffers from clogging, heavy dust, or low output. How to choose? Selection should be based on material characteristics (particle size, moisture content, abrasiveness) for coarse or fine drum screen models, the site size for equipment dimensions, and the processing capacity for motor power and screen area. For sand screening machines, the model should be chosen from 16 to 50 based on sand-stone ratio, processing capacity, and working efficiency requirements; wireless remote controls and vibrators can also be added to improve operational efficiency.

Drum Screen Specifications and Performance Parameters Table

Model	Production Capacity - Coarse Screen (t/h)	Production Capacity - Fine Screen (t/h)	Power (kW)	Rotation Speed (r/min)	Weight (t)
600×1800	18	8	2.2-3	26	1.8
800×2400	36	16	4	22	2.6
1000×3000	60	27	5.5-7.5	18	3.9
1200×3600	90	40	7.5-11	16	4.8
1500×3600	110	50	11-13	14	5.7
1800×4200	165	77	13-17	12	6.2
2100×4200	230	115	15-22	10	6.8

Sand Screening Machine Specifications and Performance Parameters Table

Model	Dimensions (m)	Motor Power (kW)	Hopper (m)	Conveyor belt (mm)	Screen mesh size (m)	Mesh hole size (cm)	Working efficiency	Supporting devices
Type 16 sand screening machine	5.0×1.2×2.1	4 kW	2.1×1.1	Width 540	1.5×0.6	1 cm (replaceable)	20 m³/h - 25 m³/h	Wireless remote control, vibrator
Type 20 sand screening machine	5.1×1.2×2.4	4 kW	2.4×1.2	Width 600	1.5×0.6	1 cm (replaceable)	30 m³/h - 35 m³/h	Wireless remote control, vibrator
Type 30 sand screening machine	7.5×1.45×2.65	7.5 kW	3m×1.45m	Width 800	2.08	1.2 cm (replaceable)	60 m³/h - 80 m³/h	Wireless remote control, vibrator
Type 50 sand screening machine	9×1.55×3.2	11 kW	3.4m×1.55m	Width 1000	2.5×0.8	1.5 cm (replaceable)	100 m³/h - 120 m³/h	Wireless remote control, vibrator

General technical parameter table

Parameters	Trommel screen	Sand screening machine
Type	Particle grading processing equipment	Sand and gravel separation equipment
Applicable scenarios	Particle grading in various industries at home and abroad	Sand and gravel separation in rivers, reservoirs, coal yards
Core advantages	Not easy to clog, low noise, low dust, high screening efficiency, high output	Simple structure, economical and practical, easy to operate
Installation angle	Small	Small
Supporting devices	—	Wireless remote control, vibrator

Dimension drawing and key dimensions: `[Image: /images/rotary-screen-and-sand-screening-machine-dimension-drawing.webp]`

Material table

Component	Standard material	Optional material	Description
Drum/screen	High manganese steel, carbon steel	Stainless steel, wear-resistant steel plate	Core screening component, highly wear-resistant
Frame/bracket	High-strength carbon steel	Hot-dip galvanized	Supports the weight of the equipment and operating load
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
Motor	All-copper coil motor	Explosion-proof motor	Standard three-phase asynchronous motor
Conveyor belt	Rubber belt	Steel wire core rubber belt	Wear-resistant, conveys materials
Control box	Carbon steel/stainless steel	Rainproof and dustproof	Equipped with wireless remote control, vibrator

Installation method: Both the trommel screen and sand screening machine must be installed on a flat and sturdy foundation or level ground. After positioning the equipment, adjust its level to ensure the installation tilt angle meets requirements (trommel screens with a small tilt angle are less likely to clog); the connection between the motor and the drive parts must ensure coaxial alignment or proper belt tension to guarantee smooth operation; the hopper, conveyor belt, and rotary screening parts of the sand screening machine must be connected in sequence to ensure raw material flows smoothly in and completes sand and gravel separation; the accompanying wireless remote control and vibrator must be correctly wired and adjusted to achieve remote control and prevent clogging; after the equipment installation is complete, a no-load trial run must be conducted to check whether the rotation of the drum/rotary screen is smooth, and whether there are abnormal vibrations or noise, and to confirm that the screen holes are unobstructed; during the load trial run, the feed should be gradually increased while observing the screening effect and motor current, ensuring it does not exceed the rated current; maintenance of the sand screening machine must only be carried out after all machinery has completely stopped. A dust removal system must be equipped to reduce dust pollution.

Application Scenario Table

Industry	Application	Recommended Configuration	Key Requirements
Mining Industry	Granular Material Classification and Processing	Trommel Screen 1000×3000–2100×4200, Coarse/Fine Screening	High screening efficiency, large output
Rivers/Reservoirs	Sand and Gravel Separation	Sand Screening Machine Type 16–50	Simple structure, easy to operate, with remote control
Coal Yard	Separation of coal blocks and impurities	Sand Screening Machine Type 20–50, Vibrator	Not easy to clog, low dust
Construction Material Industry	Aggregate Classification	Trommel Screen 800×2400–1800×4200	Smooth operation, low dust pollution
Chemical Industry	Raw Material Granule Classification	Trommel Screen 600×1800–1200×3600	Easy installation and maintenance, low noise
Water Conservancy Projects	Sand and Gravel Aggregate Screening	Sand Screening Machine Model 30–50	Large processing capacity, easy to operate

Note: The drum screen is suitable for particle grading processes in various industries domestically and abroad. The sand screening machine is mainly used for the separation of sand and stones in rivers, reservoirs, and coal yards. The screen hole size of the sand screening machine is 1cm-1.5cm (replaceable) and can be adjusted according to material requirements. Explosion-proof motors are required in explosive environments. For highly abrasive materials, it is recommended to use high manganese steel or wear-resistant steel mesh.

## Technical FAQ

1. What is a drum screen?

The drum screen is a screening device suitable for particle grading processes in various industries domestically and abroad. It has the advantages of a small installation incline angle, not easily blocked, occupies small space, low noise, less dust pollution, stable operation, high screening efficiency, large output, and easy process layout.

2. What is the working principle of a drum screen?

The drum screen operates by a motor driving the drum to rotate. After the material enters the drum through the feed inlet, it rolls and slides inside the drum as the drum rotates. Particles smaller than the screen holes pass through the mesh and are discharged, while particles larger than the screen holes are discharged from the end of the drum, achieving particle grading.

3. What models are available for drum screens?

Drum screen models include 600×1800, 800×2400, 1000×3000, 1200×3600, 1500×3600, 1800×4200, 2100×4200.

4. What is the production capacity of a drum screen?

The coarse screen production capacity is 18-230t/h, and the fine screen production capacity is 8-115t/h, depending on the model.

5. What are the motor power and speed of the drum screen?

Motor power is 2.2-22kW, speed is 10-26r/min, depending on the model.

6. What is the difference between a drum screen and a vibrating screen?

Compared with most vibrating screens currently used by domestic manufacturers, the drum screen has advantages such as a small installation incline angle, not easily blocked, occupies small space, low noise, less dust pollution, stable operation, high screening efficiency, large output, and easy process layout.

7. What is a sand screening machine?

The sand screening machine is mainly suitable for sand and gravel separation equipment in rivers, reservoirs, and coal yards. This series of sand screening machines has a simple and economical structure, is easy to operate.

8. What is the working principle of the sand screening machine?

A loader scoops raw material into the feeding hopper, which is transmitted into the rotating screen. The rotating screen separates the raw material, sand is delivered to the sand discharge port, and stones are delivered to the stone yard, completing the work.

9. What models of sand screening machines are available?

Sand screening machine models include Type 16, Type 20, Type 30, and Type 50.

10. What is the working efficiency of the sand screening machine?

Type 16: 20-25 cubic meters/hour, Type 20: 30-35 cubic meters/hour, Type 30: 60-80 cubic meters/hour, Type 50: 100-120 cubic meters/hour.

11. Can the sieve mesh size of the sand screening machine be changed?

Yes, the mesh size is 1cm-1.5cm (replaceable) and can be adjusted according to material requirements.

12. What are the supporting devices of the sand screening machine?

The supporting devices include a wireless remote control and a vibrator.

13. What are the precautions when using the sand screening machine?

When maintaining the sand screening machine, all machinery must be completely stopped before proceeding.

14. Do drum screens and sand screening machines require foundations?

Both drum screens and sand screening machines need to be installed on a level and solid foundation or flat ground. After the equipment is in place, adjust the level to ensure the installation inclination meets requirements. The sand screening machine has a simple structure and relatively low foundation requirements, but the ground must be flat and able to bear the equipment's weight.

15. What are common faults of drum screens?

Screen blockage (material too wet or sticky), drum not rotating (motor fault or loose drive belt), abnormal vibration (drum imbalance or bearing damage), reduced output (screen wear or insufficient rotation speed).

16. What are common faults of sand screening machines?

Rotating screen blockage (high mud content in raw material or too fast feeding), conveyor belt deviation (uneven tension or damaged roller), high stone content in sand (screen damage or overly large mesh), motor overheating (overload or unstable voltage).

17. Can the trommel screen and sand screening machine be customized?

The motor power, screen mesh material (high manganese steel/stainless steel/wear-resistant steel plate), screen opening size, overall dimensions, conveyor belt width, auxiliary devices (wireless remote control/vibrator), explosion-proof motor, etc., can be customized.

18. How should the trommel screen and sand screening machine be maintained?

Regularly check the wear condition of the screen mesh and replace it in time; regularly check the bearing lubrication and add or replace grease; regularly check the tension of the drive belt; regularly check whether the foundation bolts and connecting bolts are loose; regularly clean accumulated materials and debris inside the screen mesh and drum.

19. Do the trommel screen and sand screening machine comply with RoHS and REACH?

Standard equipment complies with RoHS and REACH regulations and does not contain SVHC substances of very high concern. Specific compliance should be based on the product test report.

20. How to choose a trommel screen and sand screening machine?

Choose the coarse or fine model of the trommel screen according to the material characteristics (particle size, moisture, abrasiveness); select equipment dimensions based on site size; choose motor power and screen area based on processing capacity. For a sand screening machine, select the corresponding model from Type 16 to 50 according to the sand-to-gravel ratio, processing capacity, and work efficiency requirements, and it can be equipped with a wireless remote control and vibrator to improve operational efficiency.

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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