| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus for pneumatic screening, which can perform continuous stable operation for a long period of time and, although the structure is extremely simple and its cost is low, can perform screening in the region of fine particles of less than 50μm while maintaining high screening precision. SOLUTION: The method for pneumatic screening includes: a process of supplying powder raw material onto a bottom plate 10 covering the lower edge opening of a cylindrical screening case 2 of which the inner space is partitioned into an upper space 5 and a lower space 4 by a screening net 3 so as to have a gap 12; a process of sucking air in the screening case 2 by a suction means 7 to the upper side; and a process of screening the powder raw material which is dispersed by an air current sucked from the gap 12 along the bottom plate 10 and is sucked to the upper side, with the screening net 3. COPYRIGHT: (C)2009,JPO&INPIT
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