Deflector wheel classifier with a high sharpness of cut for the classification of submicron particles at high loadings with integrated material sorting

工业相关粉末数量的干燥分类在细颗粒范围内由偏转轮分离器主导，即使在高负荷下也能提供几微米的切割尺寸。在本项目中，我们打算将切割尺寸进一步下移，同时增加切割的锐度，并将细颗粒范围内的气动分类与基于摩擦电荷的材料特定分选相结合。在第一阶段，构建了一种新型的高速分级机和一种新型的旋转分选装置，并对其进行了表征，提高了对颗粒运动和摩擦电荷的认识，在接下来的一年中，将进一步深化这一研究。在第二个阶段，将建立一个具有高分类和分类清晰度的连续过程。要做到这一点，特别是双极摩擦充电的机制，甚至发生在相同材料的给定尺寸类别中，需要阐明和技术上处理的方式，根据尺寸和材料的多维分离可以实现。

The dry classification of industrially relevant powder quantities is dominated in the fine particles range by the decflection wheel separator, which provides even at high loadings cut sizes of a few microns. In the present project, it is intended to shift the cut size further down, increasing the sharpness of cut at the same time, and to combine the aerodynamic classification in the fine particle range with a material specific sorting based on the triboelectric charging. In the first period, a new high speed classifier and a novel rotational sorting apparatus were constructed and characterized as well as the understanding of the particle motion and the triboelectric charging was improved, which should be further deepened within the remaining year. In the second period, a continuous process with high classification and sorting sharpness will be established. To do so, in particular the mechanism of bipolar triboelectric charging, which even occurs within a given size class of the same material, needs to be elucidated and technically treated in a way that a multidimensional separation according to size and material can be realized.