For what do we need air in a hammer mill?

Air has the following functions:

• Air promotes the transport of raw material through the hammer mill. This has a positive effect on the capacity of the hammer mill,
• Air cools the raw material and the hammer mill,
• Air in the feed device ensures the separation of heavy/foreign product parts and the raw material,
• Air can ensure drying of the product, in combination with the heat development in the hammer mill.