The DMR Flash Dryer is a continuous drying system that combines drying, milling and classifying in a single, compact unit. It is specifically designed for processing wet solids, slurries, pastes, and filter cakes — even those with high moisture content — into fine, uniform powders in a matter of seconds.
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DMR Flash Dryer
The DMR Flash Dryer by Hosokawa Micron is a compact, continuous drying system that combines drying, milling and classifying in a single, energy-efficient unit. Designed for safe and gentle drying of heat-sensitive products — including wet solids, pastes, slurries and filter cakes — the DMR delivers a fine, uniform powder in just seconds.
Even challenging materials can be processed efficiently thanks to the integrated high-shear rotor, which ensures rapid drying, effective deagglomeration and precise particle size control. By consolidating multiple process steps, the DMR simplifies operations, lowers energy consumption and reduces overall operating costs.
Key Benefits
- Continuous drying, milling and classifying in a single compact system
- Safe drying of temperature-sensitive products — even at elevated temperatures
- Produces ultra-fine, uniform powders in just seconds
- Handles moist solids with up to 80% moisture content — including slurries, pastes, doughs, filter cakes and wet powders
- High evaporation capacity and fast thermal transfer
- 30–40% lower energy consumption per kg of evaporated water compared to conventional drying technologies
- Small footprint and excellent accessibility for inspection and cleaning
Principle of Operation
In the DMR flash dryer, the wet product is fed via customised feeding systems into the milling and drying zone. Inside, a high-speed grinding rotor efficiently disperses and reduces the material to fine particles. A temperature-controlled stream of hot air (or optionally inert gas) – heated up to 650 °C – flows through the dryer while the system is kept under negative pressure. This hot airflow fluidises the particles in the lower section of the dryer, ensuring intense heat transfer and the instant evaporation of moisture.
The dried fine particles are carried upwards with the airstream to the integrated classifier, which separates them based on a defined cut point. Oversized or still-moist particles are returned to the drying zone until they are fully dried. The dried product is then separated from the airstream using a cyclone, filter, or wet scrubber.
Continuous fluidisation minimises product build-up on the chamber wall. Key process parameters – such as rotor speed, outlet temperature, moisture content and final particle size – can be precisely adjusted for optimal drying efficiency, product quality and process control.
Models & Capacities
Indicative values; performance depends on product properties and process parameters. Detailed information is available on request.
| Model | [-] | DMR-1H | DMR-2H | DMR-3H | DMR-4H | DMR-5H | DMR-6H | DMR-7H |
|---|---|---|---|---|---|---|---|---|
| Heigth | [cm] | 194 | 300 | 330 | 360 | 450 | 500 | 550 |
| Length | [cm] | 140 | 170 | 230 | 240 | 360 | 450 | 500 |
| Width | [cm] | 70 | 120 | 150 | 160 | 160 | 260 | 320 |
| Max. power grinding motor | [kW] | 11 | 22 | 45 | 90 | 200 | 280 | 355 |
| Min./max. power separator motor | [kW] | 0.75 – 4 | 1.5 – 11 | 2.2 – 15 | 5.5 – 30 | 11 – 45 | 22 – 55 | 30 – 75 |
Rotor Types
Hosokawa Flash Dryers are available with a choice of three rotor types, selected according to product characteristics and specific process goals. Each rotor offers distinct advantages to suit a wide range of applications:
-
DMR Rotor
A high-speed multi-blade rotor designed for strong dispersion, generating a powerful air vortex with tip speeds of up to 110 m/s. Ideal for maximum dispersing performance. -
MDH Rotor
A horizontally driven rotor with swinging hammers for intensive grinding. Recommended for processing slurries and pastes requiring strong milling. -
MDV Rotor
A vertically driven grinding rotor that gently disperses wet agglomerates and solids. Suited for mild dispersion and grinding of heat-sensitive products.
Continuous Drying Systems
As a global developer, manufacturer and 'one-stop shop' supplier of powder processing systems and plants, Hosokawa Micron provides a wide range of both batch and continuous drying technologies. We carefully select, configure and integrate all components and processes in order to ensure the optimal functionality, quality and efficiency of your drying system.
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Energy-Saving Drying Systems
Hosokawa Micron is an expert in developing advanced solids processing systems and we put a lot of our own energy into developing drying systems that will save you energy. The DMR flash mill dryer, for example, uses about 30-40% less energy per kilogram of evaporated water, compared to other direct drying technologies.
Test Before You Invest
Before investing in new equipment, test your materials under real process conditions at our Test & Process Development Centre in the Netherlands. Our experienced specialists help you determine the most efficient mixing, agglomeration or drying process, from laboratory trials to full-scale production testing.
Whether you want to evaluate a single machine or a complete processing line, we provide tailored testing and process optimisation to ensure reliable scale-up and proven performance.
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Talk to our experts
Let our specialists help you configure the right flash dryer for your powders and bulk solids — tailored to your process and optimised for efficiency, safety and product quality.
Applications
The DMR flash mill dryer is ideal for a wide range of products. Here are a few examples:
FAQ – DMR Flash Dryer
What is a DMR Flash Dryer?
How does a DMR Flash Dryer work?
The DMR uses a stream of hot air to rapidly evaporate moisture from the feed material. Simultaneously, an integrated rotor provides mechanical energy to break up agglomerates and disperse the material evenly. A dynamic classifier ensures that only product within the desired particle size range is collected, while oversized material is recirculated for further processing.
What materials can be processed in the DMR Flash Dryer?
The DMR is suitable for a wide range of challenging materials, including heat-sensitive compounds, sticky or cohesive substances, and products with up to 80% moisture content. It can process slurries, filter cakes, pastes and wet powders — even those that are difficult to handle with conventional drying systems.
What are the advantages of the DMR Flash Dryer?
The DMR offers several key benefits: high evaporation rates, excellent energy efficiency, compact design, and fast drying with minimal thermal impact. It reduces operational costs by combining multiple process steps — drying, milling, and classifying — into one system, and uses up to 40% less energy than traditional drying technologies.
What capacities and sizes are available?
DMR Flash Dryers are available in various sizes to accommodate pilot-scale testing as well as full-scale industrial production. Capacities vary depending on the material properties and moisture content but can range from a few kilograms to several tonnes per hour. Hosokawa Micron can tailor each installation to your specific process requirements.
Sustainable process technologies
Hosokawa Micron B.V. is committed to sustainable and responsible process technology. Our ISO 14001 certification covers key environmental aspects such as air, soil, energy, waste, water, noise and hazardous substances. With an EcoVadis Silver Medal, we rank among the top 3% of EcoVadis-rated companies in the special machinery industry.
