Circulating grinding plant with two grinding devices and method for operation of the circulating grinding plant

摘要

The present invention relates to a method for operating a circulating grinding plant for the grinding of fresh material (1), comprising the steps of the comminution of the freshly material (1) to ground material to be ground (5) in a first, as a roller press, which is constructed as a grinding device (3), dividing the ground mill base (5) into a first and second partial stream (7, 8) in a variably adjustable ratio, precautions of the first partial stream (7) in a below the first grinding device (3) arranged static classifier (10), wherein no longer be constructed in such a material to be separated (13) and separated coarse material (15) are discharged pneumatic transport of the classified-out point of view of material (13) to a above the first grinding device (3) arranged dynamic classifier (18), after sifting of the classified-out point of view of material (13), wherein oversize material (20) and finished material (9) are discharged and to recirculate the oversize material (20) to the first grinding device (3). The present invention also relates to a corresponding circulating grinding plant.According to the invention are provided a recirculating of the separated coarse material (15) to the first grinding device (3), a crushing of the ground mill base of the second partial stream (8) in a second grinding device (25) by means of grinding to a ground material (27) and a precautions of the above process of this mill base (27) in the static classifier (10).