Stirring mill

A stirring mill comprising:

• a horizontally arranged milling vessel, which has a cylindrical inner wall,
• a stirring shaft, which is arranged in the milling vessel and which can be driven about a joint central longitudinal axis in a drive direction of rotation,
• a milling chamber, which is defined by the inner wall and the stirring shaft,
• wherein, at a first end of the milling chamber, an inlet for material to be ground discharges into said milling chamber,
• wherein an outlet for material to be ground opens out from a second end of the milling vessel, which is opposite to the first end of the milling vessel,
• wherein the stirring shaft has a first stirring shaft section of a smaller diameter D24, which is adjacent to the inlet for material to be ground and which defines a first milling chamber area, and a second stirring shaft section of a larger diameter D25, which is adjacent to the outlet for material to be ground and which defines a second milling chamber area, whereby the following applies:
• D25>D24,
• wherein the second stirring shaft section has a hollow space, which is closed by a bottom with respect to the first stirring shaft section and in which a screen is arranged, which is connected to the outlet for material to be ground and which ends at a distance upstream of the bottom,
• wherein the second stirring shaft section has slits, which connect the hollow space to the second milling chamber area, and
• wherein the first stirring shaft section has at least one bypass channel, which penetrates the bottom of the hollow space and connects the first milling chamber area to the hollow space.