Patent ID: 6260779
Filing Date: 2001-07-17
Classification: B02C

Abstract:
An agitator mill comprising:a grinding receptacle (9), a cylindrical wall (27) and a lid (10, 10', 10"", 10'"") and a bottom (12, 12'"") of which define a grinding chamber (13) to be filled with auxiliary grinding bodies (23), and which has an axis (19); an agitator (14), which is disposed in the grinding receptacle (9) and has an agitator shaft (15) and agitator elements (16) mounted thereon; a drive motor (2) for driving the agitator (14) in rotation about said axis (19);a grinding-stock supply line (20, 20'""), which is provided with a pump (20a) and which is disposed at least in vicinity to one of the lid (10, 10', 10"") and the bottom (12'"") and has an opening into the grinding chamber (13)at which the pump (20a) produces a high pressure;a grinding-stock/auxiliary-grinding-body separating device (22, 22'""), which is disposed at least in vicinity to one of the bottom (12) and the lid (10'"") and opens into a grinding-stock discharge line (21, 21'""); andan auxiliary-grinding-body return line (24, 24', 24"", 24'""), which is separate from the grinding-stock supply line (20, 20'""), which comprises an outlet (26, 26"") from the grinding chamber (13) in the vicinity of the cylindrical wall in a portion of local excess pressure and neighboring the separating device (22, 22'""), andwhich comprises an inlet (25, 25', 25"", 25'"") into the grinding chamber (13) which in reference to a radial direction from the axis (19) is arranged in vicinity to the agitator shaft (15) in a portion of local negative pressure in comparison to the excess pressure at the outlet (26, 26"") and the high pressure at the opening of the return line and neighbors the inlet of the grinding-stock supply line (20, 20'"") in the direction of the axis (19).