Pre-comminution device for a ball mill or agitator ball mill and ball mill with pre-shredding device

摘要

The invention relates to a pre-crushing device for a ball mill or agitator ball mill, wherein the pre-crushing device between a Mahlguteinlass the ball mill or agitator ball mill and a grinding chamber is arranged and a first stationary trained crushing means and a second rotatably movable crushing means, between which a crushing gap is formed. The first stationarily formed comminuting means is a comminution ring arranged in the grinding container. According to the invention, the first stationarily formed comminuting means has an internal toothing. The second shredding means comprises a first portion and a second portion. The second subregion has guide structures for the ground material, via which the ground material can be conducted in the direction of the first subregion. The first portion of the second crushing means comprises a first outer toothing. The first comminution means and the second comminution means are arranged such that the external toothing of the first subregion of the second comminuting means largely engages in the internal toothing of the first comminuting means to form the comminution gap. The invention further relates to a ball mill with Vorzerkleinerungsvorrichtung.