AIR CLASSIFICATION METHOD, AIR CLASSIFIER, AND CLASSIFIER EQUIPPED WITH THE CLASSIFIER

摘要

PURPOSE: To classify particles with different sizes contained in a raw material to be classified at high precision. ;CONSTITUTION: In an air classifier 100, part of an air current containing a raw material 15 to be classified which is ejected from a raw material supply nozzle 16 into a raw material sorting chamber 14 is sucked by a suction hole which is formed in the air current contact face of a Coanda block 40 and discharged outside the Coanda block 40 through a through hole 45. In this way, even when the strength of the jet which is ejected from the nozzle 16 into the raw material sorting chamber 14 with the raw material 15 entrained is increased, since the air current is not peeled off from the air current contact face of the Coanda block 40, particles contained in the raw material 15 are dispersed to the whole breadth of the raw material sorting chamber 14 by the centrifugal force due to Coanda effect, so that the particle contained in the raw material 15 are discharged respectively into exhaust channels 7, 8, 9 surely by their sizes.;COPYRIGHT: (C)1996,JPO