Patent ID: 8398007
Filing Date: 2013-03-19
Classification: B02C

Abstract:
1. A jet mill in which crushed material introduced into a crushing chamber is comminuted by a swirl flow produced by gas sprayed from a plurality of spraying nozzles disposed along an internal perimeter wall of the crushing chamber, said jet mill comprising: a horizontal spraying nozzle that generates a swirl flow in a horizontal direction within the crushing chamber; and an oblique spraying nozzle that sprays gas in an oblique direction relative to the horizontal direction within the crushing chamber, wherein the horizontal spraying nozzle and the oblique spraying nozzle constitute a pair, so as to produce a helical flow by intertwining the horizontal swirl flow from the horizontal spraying nozzle and an oblique flow generated by the oblique spraying nozzle, a total number of oblique spraying nozzles being equal to a total number of horizontal spraying nozzles.