Alpine Dual Mill ADM
The ADM is an impact classifier mill that features a flexible design and energy-efficient operation. Three different classifying wheels can be installed, allowing the fineness range to be optimised for the product being processed. The powerful classifier wheels enable finenesses that were previously only possible with jet mills.
- Energy-efficient grinding
- Low pressure loss
- Compatible with classifier wheels based on the ATP operating principle
- Very high finenesses possible
- Steep particle size distribution

How it works
The grinding process in an ADM system begins with the transport of the product into the grinding chamber, which can be carried out pneumatically or via a screw conveyor. In the grinding chamber, the fed product is hit by rapidly rotating grinding tools. Due to the high impact speed, the material being ground is partially crushed, powerfully accelerated and hits the stationary impact chuck. The product is further crushed in the grinding zone by the impact on the impact chuck.
Air supplied from below transports the ground material to the classifier wheel after a deflection at the cover of the grinder. This separates the particles according to their size. Only those particles that have already reached the desired fineness can pass through the classifier wheel and leave the machine as a finished product. Coarser particles, on the other hand, are rejected by the classifier wheel and re-enter the grinding zone. This creates a grinding-classifying cycle until the feed material is reduced to the desired fineness.
The fineness of the end product can be controlled in two ways: On the one hand via the setting of the grinding tools, on the other hand via the rotation speed of the classifier wheel. A higher speed means that only finer particles can pass through the classifier, while at a lower speed, coarser particles also enter the finished product.

1: Classifier wheel
2: Grinding disc
3: Grinding track
4: Classifier wheel drive/ drive for grinding disc
5: Processing air
6: Air duct
7: Rinsing air
Characteristics
Higher performance compared to similar models
Reduced energy consumption thanks to optimised process control and system technology
Low pressure loss for more energy-efficient production and stable operation
Classifier wheel variants with proven ATP or ATP-NG technology for the finest products and steep particle size distribution
Wear-protected, pressure shock-resistant and stainless steel variants
Good accessibility and easy-clean design for many sizes
Areas of application
- Food: Sugar and sweeteners, animal feed, cocoa processing, protein shifting, speciality flours, thickeners
- Chemistry: Powder coating, crop protection, industrial wax, lithium-ion batteries, recovered carbon black, lignin
Technical Data
|
ADM 355 |
ADM 500 |
ADM 710 |
ADM 1000 |
|
|---|---|---|---|---|
|
Scale-up factor |
1 |
2 |
4 |
8 |
|
Air flow (m³/h) |
1120 - 1800 |
2240 - 3550 |
4500 - 7100 |
9000 - 14.000 |
|
Classifier drive performance (kW) |
4 - 5,5 |
5,5 - 7,5 |
11 - 15 |
22 - 30 |
|
Rotor drive performance (kW) |
11 - 18,5 |
22 - 37 |
45 - 75 |
75 - 110 |