Patent ID: 8365922
Filing Date: 2013-02-05
Classification: B03B

Abstract:
1. A classifying device having two or more classifying passages, the classifying device comprising: a first classifying passage to which particle dispersion liquid is fed; a plurality of discharge ports provided in the first classifying passage, the plurality of discharge ports including a plurality of coarse particle dispersion liquid discharge ports and a fine particle dispersion liquid discharge port; a second classifying passage; and a plurality of connecting passages that transport coarse particle dispersion liquid to the second classifying passage from the first classifying passage via the plurality of coarse particle dispersion liquid discharge ports, wherein an average particle diameter of particles contained in the coarse particle dispersion liquid is larger than an average particle diameter of particles contained in the particle dispersion liquid fed to the first classifying passage, an average particle diameter of particles contained in fine particle dispersion liquid is smaller than the average particle diameter of the particles contained in the particle dispersion liquid fed to the first classifying passage, and the coarse particle dispersion liquid discharge ports are provided in more upstream part of the first classifying passage than the fine particle dispersion liquid discharge port.