AIRFLOW TYPE CLASSIFIER

To provide an airflow type classifier capable of separating raw material powder into fine powder and coarse powder with a high fine powder recovery rate.SOLUTION: In an airflow type classifier, multiple gas injection nozzles 13a,13b have multiple first gas injection nozzles 13a for injecting gas to a direction forming a first angle θ1 inside a classification chamber 6 to a tangential direction of a peripheral wall 4, and multiple second gas injection nozzles 13b for injecting gas to a direction forming a second angle θ2 larger than the first angle θ1 inside the classification chamber 6 to the tangential direction of the peripheral wall 4.SELECTED DRAWING: Figure 3 【課題】高い微粉回収率で、原料粉体を微粉と粗粉に分離することが可能な気流式分級機を提供する。【解決手段】複数の気体噴射ノズル１３ａ，１３ｂは、周壁４の接線方向に対して分級室６の内側に第１角度θ１をなす方向に気体を噴射する複数の第１気体噴射ノズル１３ａと、周壁４の接線方向に対して分級室６の内側に第１角度θ１よりも大きい第２角度θ２をなす方向に気体を噴射する複数の第２気体噴射ノズル１３ｂとを有することを特徴とする気流式分級機。【選択図】図３