pre-grinding device for a ball mill or agitator ball mill and ball mill with pre-grinding device

摘要

pre-grinding device (7) for a ball mill or agitator ball mill (1), wherein the pre-grinding device (7) is disposed between a grinding product inlet (4) of the ball mill or agitator ball mill (1) and a grinding chamber (2r) and comprise a first stationary running crushing means (20), and a second rotationally movable crushing means (30), between which a slit is formed. grinding (s). The first stationary grinding means (20) is a grinding ring (21) disposed on the grinding container (2). according to the invention the first stationary executed grinding means (20) has an internal denture (26). the second grinding means (30) comprises a first partial area (34) and a second partial area (35). the second partial area (35) has guide structures (37) for the milling product through which the milling product can be guided towards the first partial area (34). the first partial area (34) of the second grinding means (30) comprises a first external dentation (36). the first crushing means (20) and the second crushing means (30) are arranged such that the external dentation (36) of the first partial area (34) of the second crushing means (30) largely engages the dentation (26) of the first grinding means (20) with formation of the grinding slot (s). The invention further relates to a ball mill (1) with pre-grinding device (7).