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[ID] => 1066
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[post_date] => 2015-01-06 10:52:36
[post_date_gmt] => 2015-01-06 10:52:36
[post_content] => With Alpine High Pressure Roller Mill products are produced with a precipitous granule distribution. The high pressure roller crusher is also called roller crusher or roller press.
The significant difference of high pressure roller grinding compared with compaction is that the press forces between the rollers are lower because no new adhesive forces need to be created.
The mill feed is transported to the most narrow gap by the counter rotating rollers through friction effects. Both rollers are pressed against each other using hydraulics. This milling force is transferred to the mill feed. Through selective contact of the individual granules are created at extremely high inner tensions which lead to fractures.
The use of the optimal milling force leads to compact mills with extremely low energy requirements. Because only the outer particles of the material bed have contact with the surface of the rollers, milling that is almost contamination-free is possible.
High Pressure Roller Mills are used in the cases of medium-fine crushing of hard materials such as ceramics, minerals from 5 up to 9 on the Moh's hardness scale, metals and metal alloys. High Pressure Roller Mills are used in continuous operation or in a closed circuit with screening machines or classifiers.
[post_title] => Alpine High Pressure Roller Mill
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[post_name] => alpine-high-pressure-roller-mill
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[1] => WP_Post Object
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[post_content] =>
| Model |
|
SF 1420 |
SF 1824 |
| Throat Size at Chamber |
Inches |
14 x 20 |
18 x 24 |
| Screen Area |
Sq. Inches |
337 |
493 |
| Motor |
HP |
15 – 30 |
25 – 50 |
| Cutting Circle Diameter |
Inches |
12.5 |
16 |
| Rotor Knives |
Number |
3 |
3 |
| Bed Knives |
Number |
2 |
2 |
| Throughput |
Lbs/Hr |
1,200 |
2,100 |
| Blower |
HP |
1.5 |
3-5 |
| Cyclone |
Model |
50 |
75 |
[post_title] => Polymer Systems Premium Shurfeed Granulator
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[post_name] => polymer-systems-premium-shurfeed-granulator
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[post_modified] => 2026-06-01 10:27:26
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[2] => WP_Post Object
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[post_content] =>
[post_title] => Alpine Picoline
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[post_name] => alpine-picoline
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[post_modified] => 2026-08-13 14:35:57
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[3] => WP_Post Object
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[post_date] => 2015-01-06 10:52:36
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[post_content] =>
The grinding air is injected tangentially via Laval nozzles in the nozzle ring into the machine. This causes a spiral jet of air to form in the grinding zone, from which the mill derives its name. A high pressure forms in the mill as a result of the spiral flow of air that can rise to 1 bar overpressure in operation without product. The integrated injector is charged with compressed air which ensures that the product is conveyed into the machine against the overpressure present in the machine. This, however, is associated with a considerable compressed air consumption, which can be as much as 30% of the total grinding air requirement.
The feed product circulates close to the nozzle ring and is thus intercepted repeatedly by the air jets exiting the nozzles. Comminution is the result of inter-particle collision caused by the particles flowing at different speeds in the nozzle jet. Comminuted material is conveyed along with the air to the discharge, the spiral flow subjects the particles to a classification: only fine particles are discharged, coarse particles remain in the mill.
Alpine® AS Spiral Jet Mills are characterized by a special geometry of the mill housing in the area of the discharge, which contributes towards a finer classification effect and a sharp top cut.
The product also has an effect on the air flow within the machine: the more product there is in the machine, the more the spiral flow is braked and the lower is the centrifugal force and the coarser the end product. The relationship of the product to the classifying air flow rate is therefore the most significant parameter for setting the fineness of the spiral jet mill. In principle, different nozzle angles can also be used to achieve the required fineness values, whereby the complete nozzle ring must be exchanged in this case.
[post_title] => Alpine AS Spiral Jet Mill
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[post_modified] => 2021-05-12 17:01:59
[post_modified_gmt] => 2021-05-12 21:01:59
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[4] => WP_Post Object
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[ID] => 1061
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[post_content] =>
Mikro ACM® Air Classifying Mills were invented by HMPS in the late 1960’s and are one of the most versatile types of size reduction equipment available in the market. These units while being capable of producing fine, medium and coarse grinds for a wide variety of materials for Food, Pharmaceutical, Chemical and Mineral industries, require very little maintenance over their life span. The basic design of these mills is the impact size reduction that is coupled with an internal dynamic classifier which controls the outlet (product) particle size via recirculating the coarse particles back into the grinding zone.
There are seven main factors which determine particle size distribution for the Mikro ACM® Air Classifying Mill. When varied, the rotor type and speed combined with the liner and hammer count affects the production of fines. The separator type and speed affects the top size of the product. And lastly, the airflow governs the throughput as well as top size and fines generation. With the endless available options a machine can be configured to process just about any material that is below MOH’s hardness of 5.
[post_title] => Mikro ACM
® Air Classifying Mill
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[post_name] => mikro-acm-air-classifying-mill-3
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[post_modified] => 2026-06-04 12:01:38
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[guid] => https://www.hmicronpowder.com/mikro-acm-air-classifying-mill-3
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[5] => WP_Post Object
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[post_content] => In the case of jet milling, one takes advantage of the fact that as compressed gas exits a nozzle, it is accelerated to extremely high speeds. In expanding, the energy contained in the compressed gas in the form of heat is converted to kinetic energy. The speed of sound is initially a natural limit for the exit velocity. But by using Laval nozzles, the exit velocity can be increased to above the speed of sound. Laval nozzles are characterized by their hourglass shape, which widens downstream of the narrowest cross-sectional point, the nozzle throat. The length of the divergent part of the nozzle is adapted to suit the operating pressure. Compressed air of 20°C and 6 bar overpressure is frequently used as the grinding gas, and delivers nozzle exit speeds of around 500 m/s. As a result of drawing in gas and product from the fluidized bed, the speed of the gas jets sinks extremely rapidly after exiting the nozzles.
Comminution is a result of inter-particle collision in the jets of air and also in the core area, i.e. the point where the opposing jets intersect. Jet mills are impact mills which are used to achieve maximum fineness values. Such particle sizes can only be obtained in connection with an air classifying step. Spiral jet mills have a static air classifier integrated into the mill housing, whereas fluidized bed opposed jet mills are equipped with a dynamic deflector-wheel classifier. The fineness is set as a function of the classifying wheel speed. All-important is a high product loading of the nozzle jets in order to achieve a high concentration of particles and thus high impact probabilities.
The patented Megajet nozzles were developed with this in mind. They consist of four small nozzles which as a result of their close proximity generate an under-pressure at their common center, and thus draw particles from the fluidized bed direct into the center of the nozzle jet. The product level in the machine is controlled by means of load cells or by monitoring the current loading of the classifier drive.
[post_title] => Alpine TDG/TTG Twin Turbo Opposed Jet Mill
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[post_name] => alpine-ttg-twin-turbo-opposed-jet-mill
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[post_modified] => 2026-06-11 14:50:13
[post_modified_gmt] => 2026-06-11 18:50:13
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[6] => WP_Post Object
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[ID] => 1093
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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
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.
[post_title] => Micron Drymeister Flash Dryer
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[post_name] => micron-drymeister-flash-dryer
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[post_modified] => 2026-06-04 13:18:18
[post_modified_gmt] => 2026-06-04 17:18:18
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