CLASSIFIER AND VERTICAL PULVERIZATION CLASSIFIER COMPRISING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a classifier capable of efficiently preventing accumulation of objects to be pulverized on a rotor part of a rotary classification mechanism.SOLUTION: A classifier comprises: a hollow shaft 14 disposed on an outer peripheral side of a concentric circle of a raw material supply pipe 1; a rotor part 16 coupled to a lower part of the shaft 14 and rotating with the shaft 14 in an integrated state; and plural rotation fins 13 supported to an outer peripheral part of the rotor part 16. The classifier further comprises air injection mechanisms 34, 38, 40 for jetting air 31 from the shaft 14 side on an upper surface of the rotor part 16 toward the rotation fins 13 side.