| 摘要 |
PURPOSE:To desirably enhance the grinding and treating capacity by specifying the apex angle of the tip part in the collision face of a collision member and also regulating the spreading angle of an acceleration pipe to a specified region. CONSTITUTION:When a powdery raw material is supplied from a charging port 1, it is accelerated by compressed air blown out through a nozzle 2 and discharged into a grinding chamber 8 from the outlet 13 of an acceleration pipe and furthermore struck on a collision face 14. The ground powdery raw material is smoothly carried to a classifier 24 from a discharge port 5. Fine powder is removed as classified powder and coarse powder is charged together with the powdery raw material form the charging port 1 again. The collision faces of respective collision members 4 are formed into an oblique conical shape which has a constant apex angle phi not smaller than 110 deg. and smaller than 180 deg.. Thereby the collided powdery raw material is dispersed to the whole circumferential direction and allowed to secondarily collide against the opposite grinding wall and thereby grinding capacity is enhanced. |
