| 摘要 |
PROBLEM TO BE SOLVED: To provide a pnematic classifier in which coarse powder in powder material discharged from a dispersing chamber can be reduced and ultrafine powder flowing in a classifying chamber can be reduced. SOLUTION: In a pneumatic classifier having a dispersing chamber having a rotary rotor for dispersing powder material fed together with conveying air to separate and throw out ultrafine powder and a classifying chamber connecting to below classifying chamber and for centrifugally separating the powder material flowing in from the dispersing chamber into fine powder and coarse powder, if the amount of air discharged from the rotor in the dispersing chamber and the amount of air flowing in the dispersing chamber are taken as Q1 and Q2 respectively, the formula, Q1<Q2<5×Q1 is satisfied.
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