A Rotary Sand Dryer is an industrial drying equipment used to reduce the moisture content of sand, quartz sand, river sand, sea sand, silica sand, and other granular materials. It works through a rotating drum with hot air circulating inside, ensuring uniform drying and high thermal efficiency.
Rotary sand dryers are widely used in construction materials, foundries, glass manufacturing, and mining industries, where precise drying performance is essential to achieve consistent quality.

Working Principle of Rotary Sand Dryer

The rotary sand dryer operates based on direct or indirect heat transfer between hot air and wet materials.
The process can be described in the following steps:

1. Feeding – Wet sand enters the drying drum through a feeding chute or conveyor.
2. Rotary Drying – The drum rotates continuously, lifting and cascading the sand through a stream of hot air produced by a burner or furnace.
3. Heat Transfer – Moisture in the sand evaporates as it moves through the heated chamber.
4. Discharge – Dried sand is discharged from the outlet end and collected for further processing or packaging.
5. Dust Collection – Cyclone dust collectors or bag filters are used to prevent dust pollution and ensure a clean working environment.

Main Components of a Rotary Sand Dryer

A standard rotary sand dryer system includes the following major parts:

• Rotary Drum: The main body where drying occurs, made of high-quality carbon steel or stainless steel for durability.
• Burner or Furnace: Provides heat source; can be fueled by coal, gas, diesel, or biomass.
• Hot Air Duct and Blower: Ensures hot air circulation and heat transfer efficiency.
• Feeding and Discharging System: Controls material flow for continuous operation.
• Drive System: Consists of motor, reducer, gears, and rollers to rotate the drum.
• Dust Removal Unit: Cyclone separator or baghouse filter for air pollution control.
• Control Panel: Manages temperature, rotation speed, and drying time for automation.

Technical Features of Rotary Sand Dryer

• High Thermal Efficiency: Multi-layer lifting plates ensure complete heat exchange between hot air and sand.
• Stable Operation: Robust structure and precise alignment of rollers and gears guarantee smooth rotation.
• Low Energy Consumption: Advanced insulation design and optimized air flow reduce fuel costs.
• Adaptable Fuel Options: Compatible with natural gas, coal, diesel, or biomass fuels.
• Uniform Drying Quality: Even distribution of material ensures consistent moisture removal.
• Flexible Capacity: Available from 1–100 tons per hour, suitable for both small workshops and large industrial plants.
• Environmental Protection: Equipped with modern dust collection systems to meet emission standards.

Advantages of Using a Rotary Sand Dryer

1. High Drying Efficiency

The internal flights (lifting plates) continuously lift and drop the sand, improving contact with hot air and shortening drying time.

2. Continuous and Stable Production

Designed for 24-hour operation with automatic feeding and discharging systems.

3. Energy-Saving Design

By recovering waste heat and optimizing combustion efficiency, rotary sand dryers can save up to 30% of energy compared to traditional dryers.

4. Strong Adaptability

Suitable for various sands including silica, river, sea, and foundry sand, as well as other granular materials like limestone, slag, and clay.

5. Easy Maintenance

Simple structure with wear-resistant components reduces maintenance frequency and downtime.

6. Reliable Performance

The use of high-quality steel and advanced manufacturing technology ensures long service life and stable operation under harsh environments.

Applications of Rotary Sand Dryer

The rotary sand dryer is widely used in different industries:

• Construction Industry: Drying sand for concrete and mortar production.
• Glass Manufacturing: Removing moisture from silica sand to enhance transparency.
• Foundry Industry: Preparing dry sand for casting molds.
• Mineral Processing: Drying ores, slag, and other fine particles.
• Chemical Industry: Processing granular materials that require controlled moisture content.
• Agriculture: Drying soil or organic materials used in fertilizers.

How to Choose the Right Rotary Sand Dryer

When selecting a rotary sand dryer, consider the following factors:

1. Moisture content of raw sand
2. Required final moisture level
3. Production capacity (tons per hour)
4. Available fuel type and energy cost
5. Space limitation and site layout
6. Environmental requirements and dust emission limits

Our engineering team can provide customized drying solutions according to your specific materials, plant size, and energy efficiency goals.

Rotary Sand Dryer Specifications

Model	Cylinder data			Capacity（t/h）			Cylinder rotary speed(r/min)	Power(kW)
	Outer cylinder diameter(m)	Outer cylinder length(m)	Cylinder volume(m3)	River sand	Fly ash	Slag
S6203	1.6	1.8	3.6	2-3	1-2	1-2	3-10	4
S6205	2	2	6.28	4-5	2-3	3-4	3-10	5.5
S6210	2.2	2.5	9.5	8-10	4-5	6-8	3-10	7.5
S6215	2.5	2.8	13.7	12-15	7-8	10-12	3-10	11
2×4	2	4	12.56	8-12	4-6	8-10	3-10	3×2
2×5	2	5	15.7	12-15	6-7	10-13	3-10	4×2
2×6	2	6	18.84	20-25	10-17	20-27	3-10	7.5×2
2.2×4.5	2.2	4.5	17.09	14-18	7-9	12-15	3-10	5.5×2
2.5×6	2.5	6.5	31.89	23-28	10-13	20-22	3-10	5.5×4
2.7×7	2.7	7	40.5	30-35	20-25	27-45	3-10	7.5×4
2.8×6	2.8	6	36.9	30-35	15-18	25-30	3-10	5.5×4
3×6	3	6	42.39	35-40	18-20	32-35	3-10	7.5×4
3×7	3	7	49.46	40-45	20-25	35-40	3-10	7.5×4
3.2×7	3.2	7	56.26	45-50	25-30	40-45	3-10	11×4
3.2×8	3.2	8	64.3	50-55	30-35	45-50	3-10	11×4
3.6×8	3.6	8	81.38	60-70	35-40	60-65	3-10	15×4
3.8×9	3.8	9	102	70-80	40-45	70-75	3-10	15×4
4×10	4	10	125.6	90-100	45-50	80-90	3-10	18.5×4
4.2×8.5	4.2	8.5	117.7	80-100	45-60	80-90	3-10	18.5×4

Rotary Sand Dryer Video