PRE-COMMINUTING DEVICE FOR A BALL MILL OR AGITATOR BALL MILL, AND BALL MILL WITH PRE-COMMINUTING DEVICE

摘要

The invention relates to a pre-comminuting device (7) for a ball mill or agitator ball mill (1), wherein the pre-comminuting device (7) is arranged between a milling material inlet (4) of the ball mill or agitator ball mill (1) and a milling space (2R) and comprises a first stationary comminuting means (20) and a second rotationally movable comminuting means (30) between which a comminuting gap (S) is formed. The first stationary comminuting means (20) is a comminuting ring (21) arranged in the milling container (2). According to the invention, the first stationary comminuting means (20) has an inner toothing (26). The second comminuting means (30) comprises a first subregion (34) and a second subregion (35). The second subregion (35) has guiding structures (37) for the milling material, via which the milling material can be guided in the direction of the first subregion (34). The first subregion (34) of the second comminuting means (30) comprises a first outer toothing (36). The first comminuting means (20) and the second comminuting means (30) are arranged such that the outer toothing (36) of the first subregion (34) of the second comminuting means (30) substantially engages in the inner toothing (26) of the first comminuting means (20) to form the comminuting gap (S). The invention further relates to a ball mill (1) with pre-comminuting device (7).