PNEUMATICALLY CONNECTED CASCADE CLASSIFIER AND CIRCULATING GRINDING PLANT WITH PNEUMATICALLY CONNECTED CASCADE CLASSIFIERS

摘要

The invention relates to a classifying device (1) for classifying granular material (2) to be classified, having a first V-shaped static cascade classifier (5), wherein the first cascade classifier (5) has a classifying air inlet (8), a feed opening (3) for the granular material (2) to be classified, a discharge opening (11) for a separated-out coarse-material fraction (10) and also an outlet (18) for a volume flow (12) consisting of classifying air (9) and a first drawn-off classified-material fraction, and a second V-shaped static cascade classifier (14), wherein the second cascade classifier (14) has an inlet (19) for a classifying air volume flow, a discharge opening (20) for a separated-out coarser classified-material fraction (product A) and an outlet (23) for a volume flow (22) consisting of classifying air (9) and a second drawn-off, finer classified-material fraction. According to the invention, it is provided in particular that the second cascade classifier (14) is pneumatically connected to the first cascade classifier (5) and is arranged downstream thereof, wherein the classified-air volume flow of the second cascade classifier (14) is provided by the volume flow (12) from the first cascade classifier (5). Also provided is a circulating grinding plant in which such a classifying device (1) is arranged.