摘要：从固液两相流理论出发介绍了受阻沉降器的基本原理,讨论了松散度、物料特性等因素对流体速度的影响,研究了影响流态和分级效果的结构因素,介绍了在石英砂分级中的实际应用。

关键词： 受阻沉降;两相流;水力分级;流态化

Abstract：T he principle of fluidize bed seperators and the affecting factors are introduced ．It is demonstrated that with the process steps selected in which an upward-current classifier serves as the central processing unitthe sand products can be produced with extraordinarily accurate separating efficiency． 

Keywords： hinder settle；two phase fluid；hydraulic classifier； fluidization