The Rotary Dryer, also known as the Rotary Drum Dryer, is one of the most widely used and technically mature pieces of equipment in the industrial drying field. It utilizes rotating cylinder technology and efficient heat exchange principles, where the rotation of the cylinder lifts and cascades the material to achieve full contact with hot air for rapid and uniform dewatering. With its high capacity, strong adaptability, and stable operation, the Rotary Drum Dryer has become the preferred drying solution for mining, chemical, building materials, metallurgical, and agricultural industries.
Rotary Dryer is widely used across the following industries and materials:
| Industry | Typical Materials | Purpose of Drying |
|---|---|---|
| Mining | Iron ore, copper ore, manganese ore, bauxite, concentrate, tailings, slag | Reduce moisture for crushing, beneficiation, transportation, or resource utilization |
| Chemical | Ammonium sulfate, phosphate, potassium chloride, fertilizers, dyes, catalysts | Remove free water to meet product specifications and packaging requirements |
| Building Materials | Clay, kaolin, bentonite, gypsum, limestone, silica sand | Control moisture to improve grinding efficiency and product performance |
| Metallurgical | Slag, steel slag, nickel slag, red mud, alumina | Dewater to provide feed for smelting or grinding processes |
| Agriculture | Corn, soybean, cassava, distillers grains, organic fertilizer, biomass pellets | Reduce moisture for storage, transportation, and further processing |
| Environmental | Sludge, poultry manure, industrial solid waste | Dewater and reduce volume for environmental compliance and resource recovery |
Rotary Drum Dryer utilizes either co-current or counter-current rotary drying technology, featuring a simple structure and reliable operation.
Feeding System: Wet material is fed into the feed end of the rotary dryer cylinder via a conveyor. Depending on material characteristics, a feeder and breaking device can be equipped to ensure uniform feeding.
Heat Exchange Process: A hot air furnace generates hot air (temperature adjustable between 120°C-800°C based on material characteristics), which contacts the material inside the cylinder. The cylinder rotates at a set speed, and the internal combined lifting plates continuously lift and disperse the material, forming a uniform “material curtain” that maximizes the contact area between hot air and material for efficient heat exchange.
Material Conveying: The cylinder is installed at an incline (typically 3°-6°). Under the combined effects of gravity and cylinder rotation, material slowly moves from the feed end to the discharge end, completing the drying process.
Gas-Solid Separation: The dried material is discharged from the discharge end, while dust-laden exhaust gas enters a high-efficiency dust collection system (baghouse filter or cyclone separator) for compliant. Recovered dust can be returned to the product or centrally processed based on material value.
| Dryer Size (Dia×Length) | Capacity (T/H) | Initial Moisture (%) | Final Moisture (%) | Total Power (kW) |
|---|---|---|---|---|
| Ф0.6×6m | 0.5 – 1.5 | ≤ 20 – 30 | ≤ 3 – 5 | 3 |
| Ф0.8×8m | 0.8 – 2.5 | ≤ 20 – 30 | ≤ 3 – 5 | 4 |
| Ф1.0×10m | 1.0 – 4.0 | ≤ 20 – 30 | ≤ 3 – 5 | 5.5 – 7.5 |
| Ф1.2×10m | 1.5 – 6.0 | ≤ 20 – 30 | ≤ 3 – 5 | 7.5 – 11 |
| Ф1.2×12m | 2.0 – 7.0 | ≤ 20 – 30 | ≤ 3 – 5 | 11 – 15 |
| Ф1.5×12m | 3.0 – 9.0 | ≤ 20 – 30 | ≤ 3 – 5 | 15 – 18.5 |
| Ф1.8×14m | 5.0 – 13.0 | ≤ 20 – 30 | ≤ 3 – 5 | 18.5 – 22 |
| Ф2.0×16m | 8.0 – 18.0 | ≤ 20 – 30 | ≤ 3 – 5 | 22 – 30 |
| Ф2.2×18m | 10.0 – 22.0 | ≤ 20 – 30 | ≤ 3 – 5 | 30 – 37 |
| Ф2.4×20m | 15.0 – 32.0 | ≤ 20 – 30 | ≤ 3 – 5 | 37 – 45 |
| Ф2.6×22m | 20.0 – 40.0 | ≤ 20 – 30 | ≤ 3 – 5 | 45 – 55 |
| Ф3.0×25m | 28.0 – 50.0 | ≤ 20 – 30 | ≤ 3 – 5 | 55 – 75 |
| Ф3.2×28m | 35.0 – 65.0 | ≤ 20 – 30 | ≤ 3 – 5 | 75 – 90 |
| Ф3.6×32m | 50.0 – 90.0 | ≤ 20 – 30 | ≤ 3 – 5 | 110 – 132 |
Proven, Reliable Equipment: With over 20 years of experience in rotary dryer design and manufacturing, our products have been exported to more than 50 countries and regions worldwide, proven in various operating conditions.
Customized Design, Precise Match: We provide end-to-end services from material testing and process design to equipment selection, ensuring that every rotary drum dryer is precisely matched to your material characteristics, capacity requirements, and heat source availability.
Lower Total Cost of Ownership: High wear resistance extends equipment life, energy-efficient technology reduces operating costs, and versatility minimizes capital investment—helping you achieve a lower total cost of ownership over the equipment’s lifecycle.
Global Service Network: We can dispatch engineers for overseas installation guidance and commissioning, providing bilingual technical support to ensure smooth project startup.
EPC Turnkey Capability: From single equipment units to complete drying production lines, we provide comprehensive turnkey engineering services for your convenience.
Whether you need to dry minerals, chemical raw materials, building materials, or agricultural products, one Rotary Dryer can meet your needs. Contact us today to get a drying solution tailored to your specific material characteristics.
Get Your Customized Solution:
Request a Quote → Tell us your capacity, material type, and heat source availability, and we will respond within 24 hours
Schedule a Technical Discussion → Speak one-on-one with our drying engineers
