Hammer mill Hosokawa Micron Powder Systems

The Alpine ZPS air classifying mill is a high-speed impact mill that offers grinding and classifying in one single machine. Rejection of coarse material occurs totally inside the mill by means of a positive material and air transport system. This feature combined with a horizontally oriented classifier offers the following distinct design advantages in bulk pharmaceutical milling:

- Two step processes combined in one machine
- Monoblock construction CNC machined from one piece of stainless steel
- Steep resultant particle size distributions
- Sharp classifier top cuts, instantly adjustable
- Easy clean CIP designs available
- Low grinding temperature for heat sensitive material
- Sterilize in Place (SIP) designs also available through the unique design retractable bearing assembly

Soft to medium hard products, such as pharmaceuticals , can be reduced to D97 as low as 10 microns with steep overall particle size distributions.

As indicated in this schematic, most of the process gas enters through the bottom section of the mill. Material is introduced to the tip of the rotating hammers through a port opening in the side of the mill. A serrated liner mounted on the periphery of the grinding chamber prevents particles from speeding directly to the hammers.

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