Vertical impact mill with coupled material classification

A device for comminuting and classifying bulk materials, the device comprising a vertical impact mill with associated material charging device, a screening device chargeable with air, a finished material discharging device as well as a conveying device for returning the insufficiently comminuted bulk material fraction into the comminution region, characterized by the combination of the following features:

• the vertical impact mill (2) and the screening device (3) are disposed on a divided drive shaft (22, 23);
• the screening device (3), which is provided below the vertical impact mill (2), is configured as a distribution plate (16) that is equipped with guide vanes (15) if required;
• the air (18) is supplied laterally or tangentially below the distribution plate (16);
• the final fractions are discharge laterally or tangentially above the distribution plate (16);
• the insufficiently comminuted bulk material fraction is discharged below the distribution plate (16) and is supplied to the conveying device (5) which returns the bulk material fraction into the region of the material charging device (6).