Patent ID: 8002213

Claim:
An agitator mill comprising a grinding vessel ( 2 ) that encloses a grinding chamber ( 10 ), into which a grinding stock inlet ( 11 ) opens at one end and from which a grinding stock discharge port ( 13 ) opens out at the other end, having an agitator ( 6 ) arranged in the grinding chamber ( 10 ), said agitator ( 6 ) having an agitator shaft ( 5 ) that can be driven so as to rotate, having an axis ( 16 ), a last agitator disc ( 17 , 17 ′) of a diameter b′ fixed on the agitator shaft ( 5 ) and located adjacent to the grinding stock discharge port ( 13 ), and agitator discs ( 14 ) of a diameter b fixed on the agitator shaft ( 5 ) axially upstream of the last agitator disc ( 17 , 17 ′) at an axial distance a from one another, wherein adjacent upstream agitator discs ( 14 ) define a separation angle α and the last agitator disc ( 17 , 17 ′) and the adjacent agitator disc ( 14 ) define a separation angle β, wherein each separation angle α, β, is formed by a line ( 33 ) between a radially inward end ( 35 ) of an agitator disc ( 14 , 17 , 17 ′) on the agitator shaft ( 5 ) and the outer edge ( 36 ) of an adjacent agitator disc ( 14 ) and by a line ( 34 ) that is parallel to the axis ( 16 ), and wherein 30°<α<60°, and having passages ( 22 ) formed in the last agitator disc ( 17 , 17 ′) adjacent to the agitator shaft ( 5 ) that open into the separation device ( 25 ), wherein 30°<β<60° applies also to the separation angle β between the last agitator disc ( 17 , 17 ′) and the adjacent agitator disc ( 14 ), and wherein the last agitator disc ( 17 , 17 ′) is provided on its side facing the adjacent agitator disc ( 14 ) with depressions ( 27 ).