Various kinds of cyclones for classification and their limitation are introduced with a new classifier,namely the cyclone sieve.The conditions and mechanism of cyclone sieving is analysed.

• 本文介绍了国内外传统旋流分级及其存在的缺陷,提出了一种新型的旋流分级器,即旋流筛分器,并分析了旋流筛分的条件及机理。