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Product Description
With over 15 years of deep expertise in the mineral drying industry, we are a leading industrial equipment supplier specializing in providing professional rotary drying solutions for bentonite mining and processing enterprises. Our processing capacities comprehensively cover the full range from 5 TPH to 80 TPH. We are an authentic manufacturing factory with our own production base—not a middleman or trading company. We independently manage the entire process from initial design, machining, and assembly to final factory testing, ensuring that every piece of equipment undergoes a rigorous 72-hour load-test run before delivery.
Bentonite is notoriously difficult to dry: it becomes extremely sticky at high moisture levels, tends to clump during the drying process, and exhibits high shrinkage upon drying. These unique physical properties cause conventional drying equipment to experience frequent failures and low efficiency.
Our rotary dryers are developed specifically to solve these industry pain points:
Anti-sticking lifting flights eliminate wall-adhesion issues.
Three-stage temperature control protects the mineral's active properties.
Multi-fuel adaptability slashes operational costs.
To date, we have provided stable, continuously running drying lines to major bentonite-producing regions across China (including Inner Mongolia, Henan, Liaoning, and Xinjiang) as well as international clients, maintaining a high customer satisfaction and reorder rate.
If you are looking for a reliable partner that offers a full-chain service—from technical selection and customized scheme design to equipment manufacturing, installation guidance, and lifetime after-sales maintenance—we are your ideal choice. We support on-site factory inspections, OEM/ODM customization, and global shipping.
Functional Principle
The core of the equipment is a slightly inclined, rotating steel drum. Wet bentonite enters from the elevated feed end. As the drum rotates slowly, internal lifting flights repeatedly lift and shower the material, bringing it into full contact with a co-current or counter-current flow of high-temperature hot air to drive off moisture. The dried bentonite is discharged from the lower end, while the hot, humid exhaust gas is drawn out from the top end to be processed by the dust collection system before eco-friendly emission.
The interior of the drum naturally creates three functional temperature zones along the material path:
Heating Zone (Inlet End): The material gradually absorbs heat, gently raising its temperature from ambient to 60°C–80°C. This ensures surface moisture evaporates first without forming a hard outer crust, preventing internal moisture from becoming locked inside the particles.
Core Drying Zone (Middle Section): With temperatures reaching up to 350°C, this is the primary area for rapid moisture evaporation, where the material undergoes its main transformation from high to low moisture.
Cooling Zone (Outlet End): A lower-temperature airflow cools the dried material to below 60°C before discharging. This prevents high-temperature bentonite from re-absorbing moisture during storage/transportation and eliminates potential safety hazards.
Drive & Thermal Systems
The heat source is equipped with a versatile combustion system that supports coal, natural gas, heavy oil, and biomass pellets, giving you the freedom to choose based on local energy pricing. The drive system utilizes a variable frequency drive (VFD) motor combined with a hard-tooth surface gear reducer. The drum speed is steplessly adjustable between 2–6 rpm. The system automatically accelerates with higher feed volumes and slows down with lower inputs, ensuring the optimal ratio between capacity and energy consumption.
Exhaust Treatment
The exhaust sequence is highly efficient: a cyclone separator first intercepts large particles and coarse dust, followed by a baghouse dust collector that captures fine particulates, keeping final emission concentrations strictly under 30 mg/m³. For regions with ultra-strict environmental mandates, a wet scrubber can be integrated to achieve near-zero emissions.
Core Features
1. Anti-Sticking is Our Top Priority
We embed wear-resistant ceramic tiles onto the surfaces of the lifting flights and install automatic self-cleaning scraper chains along the drum's inner walls. This dual-action approach prevents bentonite from adhering. This is not a cosmetic feature—it is the exact key that allows the equipment to run continuously without emergency shutdowns. Many clients report that after switching to our machinery, their cleaning frequency dropped from once a day to once a week or less.
2. Three-Stage Temp Control Protects Your Product's Value
The commercial value of bentonite relies heavily on its swelling ratio and adsorption capacity, both of which are highly temperature-sensitive. Excessive heat destroys the layered montmorillonite structure, downgrading your product. Our three-stage temperature control keeps the material within a safe thermal window throughout the cycle. The swelling ratio and colloid value of the finished output remain virtually identical to the raw feed, ensuring your product never depreciates during drying.
3. Total Fuel Freedom
We never lock you into a single energy type. If coal is cheap, burn coal; if gas is convenient, use gas; if you have access to biomass resources, use biomass. Our burners and hot-air systems are optimized for all common industrial fuels. Simply let us know which energy source is most economical in your area, and we will configure the optimal setup.
4. Advanced Energy Conservation
We control energy consumption through two distinct methods:
Waste Heat Recovery: A waste heat exchanger captures thermal energy from the 150°C–250°C exhaust gas to preheat incoming fresh air, pulling the overall thermal efficiency up from the industry average of ~35% to an impressive 55%–65%.
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VFD Speed Regulation: The variable frequency drive ensures the motor never idles or overloads, dropping actual electricity consumption by 20%–30% compared to fixed-frequency alternatives.
Combined, these two features deliver massive annual utility savings.
5. Extensive Export Experience and Seamless Logistics
We regularly ship equipment to Southeast Asia, the Middle East, Africa, and South America, making us highly familiar with international port shipping requirements, packaging standards, and customs clearance paperwork. Equipment can be shipped naked or containerized, with large components dispatched split-body alongside detailed installation blueprints. From order placement to vessel loading, standard models take 30–45 days, while customized models take 45–60 days—lead times explicitly guaranteed in our contracts.
6. Dedicated After-Sales Support
We offer a 12-month warranty on the entire machine, and an 18-month warranty on the reducer and motor. Common wear parts are kept in stock year-round and ship within 48 hours of an order. We provide comprehensive remote technical guidance and on-site commissioning services, ensuring final commissioning and acceptance are completed within 72 hours of the equipment arriving at your site. We don't just sell a machine; we deliver a long-term, stable production line.
Get a Custom Engineering Scheme Within 24 Hours
Send us your initial moisture content, target output moisture, daily capacity requirements, available fuel types, and site dimensions. We will deliver a comprehensive technical proposal and quotation within 24 hours. Factory direct supply with zero middleman markups—contact us today to schedule a visit!
Technical Specifications
| Product Specs (m) | Capacity (T/H) | Main Motor Power (kW) | Main Motor Model | Main Gearbox Model | Ratio |
| φ1.2×10m | 2.5 | 7.5 | Y160M-R3 | ZL50-16-1 | - |
| φ1.5×12m | 3.3 - 4.9 | 10 | Y160L-6B3 | JZQ500-III-2F | - |
| φ1.5×15m | 4 - 6 | 18.5 | Y200L-6 | JZQ500-III-2F | - |
| φ1.8×12m | 4 - 6 | 11 | Y200L-6 | ZQ50-16II-2 | 16.46 |
| φ2.2×12m | 7 - 12 | 18.5 | Y160L-6 | JZQ650-III | 31.5 |
| φ2.2×14m | 7 - 12 | 18.5 | Y160L-6 | JZQ750-III | 31.5 |
| φ2.2×16m | 12 | 30 | Y225M-6 | JZQ750-III | 31.5 |
| φ2.4×14m | 12 | 30 | Y250M-6 | JZQ750-III | 31.5 |
| φ2.4×18m | 10 - 13 | 37 | Y250M-6 | ZL85-13-1 | 27.16 |
| φ2.4×20m | 10 - 14 | 37 | Y250M-6 | ZL85-13-1 | 27.16 |
| φ3×20m | 25 | 55 | Y250M-4 | ZL100-16-1 | 41.52 |
| φ3×25m | 32 - 36 | 75 | YR280M-4 | ZL100-16-1 | 41.52 |
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