Three Drum Dryer for sale

What is a Three-Roller Dryer?

A three-roller dryer consists of three concentric rotating drums. It continuously dries bulk wet materials through staged heating and hot air circulation. The equipment relies on the synchronous rotation of the inner, middle, and outer drums. Materials first enter the first drum to evaporate moisture, then enter the second and third drums, ensuring full contact between the wet material and the hot air, resulting in uniform and continuous drying of high-moisture materials.

The three-roller dryer is a core piece of heavy-duty drying equipment, suitable for high-moisture mineral concentrates, industrial sludge, and bulk ore materials. Commonly processed materials include flotation gold concentrate, coal slime, and iron ore powder. The equipment can operate continuously and stably, with low energy consumption, excellent drying uniformity, and is suitable for complex mining environments. It is widely used in gold, copper, and iron ore beneficiation plants, as well as in industrial waste treatment scenarios.

What is the working principle of a three-roll dryer?

The three-roll dryer employs a three-layer concentric sleeve, counter-current heat exchange, and multi-pass drying principle. Utilizing the length and temperature differences between the three cylinders, it allows wet materials to come into multiple, thorough contacts with high-temperature hot air, efficiently evaporating moisture. It is suitable for high-moisture, high-viscosity, and high-volume mineral materials.

Core Workflow:

1. Feed Preheating Section (Inner Cylinder): Wet material enters the first roller from the feed end. High-temperature hot air (350-550℃) enters the inner cylinder in the opposite direction. The material tumbles continuously under gravity, is rapidly heated, and surface moisture evaporates quickly.
2. Middle Cylinder Drying Section (Enhanced Heat Exchange): Material enters the second roller. The cylinder diameter increases, and the temperature decreases (200-350℃), increasing the residence time and further reducing the moisture content.
3. Outer Drum Cooling and Shaping Section (Dehumidification and Stabilization): Material enters the third drum, where the temperature drops to 80-180℃. The hot air temperature is even lower, further dehydrating and cooling the material, stabilizing the moisture content to 5%-15%. This also reduces dust and prevents material oxidation.
4. Discharge and Dust Removal: Dry material is discharged from the end of the outer drum and conveyed to the finished product silo. The wet and hot exhaust gas is purified by a cyclone + bag filter before being discharged in compliance with standards, recovering fine powder and reducing losses.

In short: The three-drum dryer allows wet materials to undergo “high-temperature rapid drying → medium-temperature deep drying → low-temperature stable drying,” with three layers of repeated heat exchange, resulting in high efficiency, uniform drying, and anti-sticking properties. It is specifically designed for minerals with high moisture content.

What is the structure of a three-drum dryer?

A three-drum dryer mainly consists of three coaxial inclined drums, supplemented by support and drive systems, hot air systems, feeding and discharging systems, and auxiliary systems.

• Drum body: Wear-resistant and high-temperature resistant, with internal lifting plates to ensure uniform material tumbling.
• Support and drive: Supported by rollers, driven by a motor and reducer.
• Hot air system: Provides high-temperature airflow to dry the material.
• Feeding and discharging: Wet material enters from the feed end, and the dried product exits from the discharge end.
• Auxiliary systems: Insulation layer, dust collector, and temperature control system to improve thermal efficiency and safety.

This design ensures that the material is dried step-by-step within the three drums, resulting in uniform drying and high efficiency, suitable for continuous processing of high-moisture, high-volume materials.

Why Choose CHUNLEI’s Three-Drum Dryer?

CHUNLEI’s three-drum dryer is specifically designed for high-moisture, high-yield minerals and industrial materials. The equipment boasts stable operation and high thermal efficiency, meeting the production needs of various materials and operating conditions. From R&D and production to EPC turnkey projects, the entire supply chain is independently controlled, making it a reliable partner preferred by global mining clients.

1. 30 Years of Professional Experience in Mining Drying, More Mature Technology

• Deeply rooted in the mineral drying field for over 30 years, serving over 150 mining projects worldwide, with expertise in drying the characteristics of high-moisture materials such as gold/copper/iron concentrates and coal slime.
• Self-developed three-layer counter-current heat exchange core technology, achieving a stable thermal efficiency of 65%-80%, far exceeding ordinary models in the industry (40%-50%), and saving 30%+ energy compared to single-drum dryers.

2. Highly Adaptable Customized Solutions, Fitting Your Materials

• Free material testing: testing for moisture, viscosity, particle size, and heat resistance, eliminating the risk of incompatibility with general-purpose models.
• Customized Thermal Design: Precise calculation of capacity, heat source, and cylinder specifications avoids underutilization of resources or insufficient capacity.

3. Robust Quality, Durable and Worry-Free

• The cylinder is made of heat-resistant steel plate with a high-manganese wear-resistant steel lining, extending its service life by 2-3 times compared to ordinary models.
• Full Factory Inspection: Each unit undergoes no-load/load test runs to ensure zero malfunctions upon arrival and 24-hour continuous and stable operation.

4. Intelligent Control, Environmentally Friendly Design

• Temperature, airflow, and speed can be monitored in real time to ensure uniform drying.
• Equipped with dust removal and exhaust gas treatment systems, meeting modern environmental standards.

5. Full-Chain Service, Worry-Free Overseas Deployment

• One-stop EPC turnkey service: Design → Production → Shipping → On-site Installation → Commissioning → Training – no worries for you.
• Overseas Localization Support: Exported to multiple countries, adaptable to different working environments; on-site engineers provide guidance and quickly resolve on-site issues.

Choosing CHUNLEI isn’t just about buying a piece of equipment; it’s about choosing a complete solution for high-humidity mineral drying that reduces costs and increases efficiency, ensuring stable profits and long-term peace of mind for your drying projects. Get a free customized solution now!

What materials are suitable for drying with a three-roll drum dryer?

The three-roll drum dryer is highly adaptable to various materials, and is best suited for handling high-moisture, high-viscosity, and high-volume bulk industrial materials. It is widely used in building materials, metallurgy, mining, chemical, and cement industries. This equipment can process various granular and powdery materials, reducing the moisture content to below 1%, meeting subsequent processing and storage requirements.

• Dry mortar and foundry industry: Drying of yellow sand and full-size artificial sand
• Building materials and cement industry: Drying of slag, limestone, quartz sand, and silica sand
• Chemical industry: Drying of industrial residues, concentrates, and tailings
• Other high-moisture materials: Granular raw materials such as metal powders, fly ash, river sand, and gypsum. The three-roll drum dryer achieves efficient and uniform drying through continuous rotation and hot air heat transfer, making it an indispensable key piece of equipment in large-scale industrial production lines.

What is the processing capacity of a three-rotor dryer?

The processing capacity of a three-rotor dryer varies considerably depending on the drum specifications, material characteristics, and feed moisture content:

• Small Model: Processes 5–20 tons of material per hour, Φ2.0×4m–Φ2.2×5m, suitable for experiments or small-scale production lines.
• Medium Model: Processes 20–80 tons of material per hour, Φ2.5×6m–Φ2.8×6m, suitable for medium-sized mines or building materials enterprises.
• Large Model: Processes 80–300 tons of material per hour or even higher, Φ3.0×6m–Φ3.6×8m, suitable for large-scale continuous industrial production lines.
• Extra-large Model: Processes 80–300 tons of material per hour, Φ4.0×10m and above, suitable for large-scale continuous industrial production lines with high output requirements.

The actual processing capacity is also affected by the following factors:

1. Material moisture content: Higher material moisture content requires a longer drum and residence time.
2. Material properties: Sticky or easily agglomerated materials may reduce capacity.
3. Hot air temperature and fuel type: Higher hot air temperature and better thermal efficiency result in faster material drying.
4. Drum dimensions and rotational speed: Drum length, diameter, and rotational speed directly affect material residence time and throughput.

Is a three-rotor dryer suitable for materials with high moisture content?

Absolutely! A three-rotor dryer is the preferred drying equipment for materials with high moisture content (30%-80%), especially widely used in mining, building materials, metallurgy, chemical, and biomass industries. Modern three-rotor dryers can also be equipped with automated temperature control, waste heat utilization, and dust removal systems, ensuring uniform drying of high-moisture materials while reducing energy consumption and improving production efficiency.

Applicable Materials:

• High-moisture minerals: such as slag, sand, concentrate, tailings, etc., can quickly reduce moisture content.
• High-moisture coal and coal slime: By adjusting the drum speed and hot air temperature, material blockage and clumping can be avoided.
• Biomass and agricultural waste: such as straw, sawdust, chicken manure, etc., low-temperature or segmented drying processes can be used to ensure safe and uniform drying.

What are the differences between single-drum and three-drum dryers?

A single-drum dryer has a simple structure with only one drum. The material spends a short time in the drum, making it suitable for materials with low moisture content and uniform particle size. However, its output is limited, and its thermal efficiency is relatively low.

In contrast, a triple-drum dryer consists of three coaxial inclined drums. The material is dried sequentially within each of the three drums, resulting in a longer residence time and better drying uniformity. Even high-moisture, high-viscosity materials such as slag, sand, concentrate, or some biomass materials can achieve stable and continuous drying. The multi-drum design, combined with hot air recovery and automated control, makes triple-drum dryers more efficient and energy-saving in high-volume production, making them the preferred equipment for modern mining and industrial production lines.

In short, single-drum dryers are cheaper but less efficient and prone to sticking to the walls; triple-drum dryers are slightly more expensive but energy-efficient, non-stick, and durable, making them more cost-effective in the long run.

Advantages of Three-Roller Dryers

The three-roller dryer boasts numerous advantages, making it the preferred equipment for drying high-moisture materials in the mining, building materials, metallurgy, chemical, and biomass industries. Firstly, its three-stage drum drying design ensures sufficient residence time for the material within the drum, resulting in uniform heating and stable drying even for high-moisture, high-viscosity materials.

Secondly, the three-roller dryer offers high output, suitable for continuous industrial production. Its high thermal efficiency, combined with hot air recovery and an automated control system, significantly reduces fuel consumption and operating costs. The wear-resistant drum body and robust structure, along with supporting rollers, drive systems, and dust removal systems, guarantee long-term stable operation.

Furthermore, the multi-roller design broadens the equipment’s applicability, enabling efficient drying of materials ranging from slag, sand, and concentrates to fly ash, straw, and biomass pellets. Overall, the three-roller dryer is characterized by high efficiency, energy saving, stability, and strong adaptability, making it a reliable choice for modern large-scale industrial drying projects.

CHUNLEI offers free testing of incoming material moisture content, particle size, viscosity, and heat resistance, and can tailor-make drum structures, lifting plate styles, and heating systems to suit individual needs. Contact our experts now for a free solution!

What is the price of a three-rotor dryer?

The typical market reference price for a triple-rotor dryer is around US$15,000–100,000. The specific price will vary depending on output, material characteristics, and customized configuration.

It is important to note that equipment with excessively low prices often carries the following risks:

• Poor drum material and wear resistance, resulting in a short service life and susceptibility to wear or deformation.
• Inadequate thermal design, leading to low drying efficiency and uneven material drying.
• Poor quality drive and roller systems, prone to malfunctions or downtime.
• Lack of automated control and safety features, making operation difficult to monitor and resulting in high maintenance costs.

Therefore, when purchasing a three-rotor dryer, in addition to considering the price, it’s crucial to focus on equipment quality, thermal efficiency, and reliability to ensure long-term stable and efficient operation.

Is a customized production process for a three-rotor dryer required?

Yes, a three-rotor dryer typically requires customized process design based on material characteristics, moisture content, output, and production needs. Different materials vary significantly in particle size, viscosity, and moisture content. Using a general-purpose process cannot adapt to all materials; a customized solution is essential to ensure stable production.

Professional technical team process services:

1. Analyze material testing reports and verify parameters such as moisture content, particle size, viscosity, and thermal conductivity.
2. Draw complete equipment process drawings and accurately plan the installation layout of each piece of equipment.
3. Optimize the routing based on the plant terrain and utilize gravity feeding to save electricity.
4. Calculate fuel, electricity, and water consumption and match corresponding specifications of supporting equipment.

A reasonable customized process not only improves drying efficiency and output but also reduces energy consumption and maintenance costs, ensuring stable and reliable equipment operation in the long term.

Contact us now for a free dryer customization solution!

Technical Parameters of Three Drum Dryer

Mode(m)	Ф2×4.5	Ф2.2×5	Ф2.5×6	Ф2.7×6.5	Ф3.0×6.5	Ф3.2×7	Ф3.6×8	Ф4.2×8
Outer tube diameter(m)	2	2.2	2.5	2.7	3.0	3.2	3.6	4.2
Length of outer tube(m)	4.5	5	6	6.5	6.5	7	8	8
Cylinder volume(m3)	14.13	18.99	29.43	37.19	45.92	56.27	81.39	110.78
Cylinder speed(r/min)	4-10	4-10	4-10	4-10	4-10	4-10	4-10	4-10
The maximum intake air temperature(℃)	700-750	700-750	700-750	700-750	700-750	700-750	700-750	700-750
Capacity(T/h)	13-18	15-23	20-28	24-33	35-40	40-60	55-75	70-120
Motor power(kw)	5.5×2	7.5×2	5.5×4	7.5×4	11×4	15×4	18.5×4	22×4

FAQ

Q: How long does it take from ordering to putting the entire set of equipment into production?

A: The overall cycle is 2-3 months, with 20-25 days for production, approximately 45 days by sea, and 15 days for on-site installation and commissioning.

Q: Does the equipment consume a lot of water?

A: Only a small amount of water is used for heat source cooling and dust removal. Materials do not come into contact with water throughout the process, making it suitable for use in arid mining areas.

Q: Can a diesel generator power the equipment in mining areas without a power grid?

A: Yes, a generator set can be matched to the total power of the equipment to meet the production conditions of remote mines.

Q: What is the minimum profitable production capacity of the equipment?

A: A capacity of 3-5 tons per hour is sufficient to achieve profitability. The higher the capacity, the lower the unit material drying cost.

Q: Can the three-drum dryer dry slurry with high mud content?

A: Yes, with a customized V-shaped anti-sticking and self-cleaning structure, high-mud slurry will not stick to the drum or clump, ensuring stable drying.

Q: Is there a lot of mineral dust after drying? Does it meet environmental standards?

A: Equipped with a two-stage dust collection system of cyclone + bag filter, dust emissions are ≤30mg/Nm³, meeting environmental standards of multiple countries.

Q: Will sulfide ore oxidize during drying?

A: Hot air temperature is controlled at 250-350℃ to avoid high-temperature oxidation and preserve the mineral’s flotation value.

Q: Can the three-drum dryer be installed outdoors?

A: Yes, it can be installed outdoors. The entire machine is treated for corrosion and rust prevention, and the drum is insulated and rainproof, adapting to harsh mining environments.

Q: Will low temperatures in winter affect the drying effect?

A: No, the drum is insulated, and the hot air supply is stable, so drying efficiency is basically unaffected in low-temperature environments.

Q: Is daily maintenance of the equipment complicated?

A: Maintenance is simple. Regularly check the lifting plates, rollers, and seals; no complicated operations are required.