Apparatus for crushing material containing particles that are hard to pulverize

摘要

The invention concerns an apparatus for crushing, by means of a rotary mill, material containing particles that are difficult to pulverize. The mill has an air-sifter with pneumatic supply of ground material, where the coarse-material discharge of the air-sifter is connected to the intake side of the mill, and has a mechanical conveyor whose intake side is connected to the coarse-particle discharge of the mill and whose discharge is connected to the intake side of the mill.