Air classification was studied in centrifugal rejector wheel classifiers specially developed for classifying submicron particles. The aim of the study was the structural design of a classifier for highly selective classification in the particle size range below 1 mu m, ensuring a low percentage of misplaced particles. A laser diffraction spectrometer and an X-ray sedimentation centrifuge were used for particle size analysis. Basic preconditions for efficient classification in the submicron range such as high circumferential speeds of the rotor to increase the radial velocity component of the particles (settling velocity) in the centrifugal field or a favourable cut-point curve in the direction of flow were realized. An existing air classifier design of the Institute for Mechanical Process Engineering and Environmental Process Engineering of the TU Clausthal was taken as a basis and gradually modified.
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机译：在专门针对亚微米颗粒分类的离心式剔除轮分类器中研究了空气分类。该研究的目的是在小于1微米的粒径范围内进行高度选择性分级的分级机的结构设计，以确保较低比例的错放颗粒。使用激光衍射光谱仪和X射线沉降离心机进行粒度分析。实现了在亚微米范围内有效分类的基本前提，例如转子的高圆周速度以增加离心场中颗粒的径向速度分量（沉降速度）或沿流动方向的有利切点曲线。 TU Clausthal的机械过程工程和环境过程工程研究所的现有空气分级机设计作为基础，并逐步进行了修改。
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