PNEUMATIC CLASSIFIER

WIPO Patent Application WO/2023/063173

A1

Provided is a pneumatic classifier that is capable of maintaining classification precision for a prolonged period of time and that has smaller classification points. This pneumatic classifier comprises: a casing which has a ceiling wall and an annular wall that is provided contiguously to the outer rim of the ceiling wall; a classification plate which is disposed on the ceiling wall of the casing so as to have the surface thereof facing the ceiling wall; a classification chamber which is formed between the ceiling wall of the casing and the surface of the classification plate; a gas supply part which feeds gas into the classification chamber so as to generate a swirl flow therein; a raw material supply part which feeds raw material powder to the swirl flow generated within the classification chamber; a fine powder discharge port which is provided to a central part of either one of the surface of the classification plate and the ceiling wall of the casing forming the classification chamber; a coarse powder discharge port that opens along the outer periphery of the classification chamber on the side of either the ceiling wall or the surface of the classification plate facing the ceiling wall; and a groove part which is provided in the ceiling wall and/or the surface of the classification plate.

JIKIHARA KENJI (JP)
KOMINE TAKUMI (JP)

PCT/JP2022/037146

April 20, 2023

October 04, 2022

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NISSHIN SEIFUN GROUP INC (JP)
NISSHIN ENG INC (JP)

B07B7/08; B07B11/06

WO2015001905A1

2015-01-08

JP2005152801A	2005-06-16
JPS60114367A	1985-06-20

ITOH Hideaki (JP)

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