Centrifugal classifier with special classifier wheel

Abstract

Centrifugal classifier (1) with a classifier housing (2) and a classifier wheel (7) rotating in the classifier housing (2), wherein the classifier wheel (7) comprises a classifier drum (14) and a classifier wheel shaft (11) forming its axis of rotation, and wherein the classifier housing (2) has at least one coarse material outlet (8), characterized in that a guide element (28) is arranged in the region of the at least one coarse material outlet (8), wherein the guide element (28) is arranged at a minimum radial distance X from the inner surface of the classifier housing section surrounding the classifier drum (14), which is usually at least substantially cylindrical, and is designed such that material flowing along said inner surface at a radial distance ≤ X passes under the guide element (28) and is then discharged into the coarse material outlet (8), and material flowing along said inner surface at a radial distance > X flows alongin a radially inward direction towards the classifier drum (14), wherein the minimum radial distance X maintained by the guide element from the inner surface of the classifier housing section surrounding the classifier drum (14) is a multiple smaller than the radial distance maintained by the guide element from the classifier wheel, wherein said minimum radial distance X is ideally between 3 mm and 12 mm and is preferably adjustable, ideally continuously.