Development of Shape Classifier for Fine Particles

形状分类器在之前的研究中作为实验基础（专利申请中，62- 1950）。该分级机适用于110微米以上的粒度。然而，它不了解这种分类器是否有效的情况下，小于约110微米的颗粒。本研究首先改进了圆孔筛网的制作方法，对小于110 m的颗粒进行形状分类。用刻蚀法在薄不锈钢板上开了许多直径为100微米的孔。并采用非电解法对该筛网进行镀镍处理。用这种方法得到了许多直径为80 μ m的均匀孔，虽然以前有人说100 μ m是极限。通过这种新筛的发展，颗粒的形状分类到直径约80微米已经成为可能。此外，通过扩大屏幕的表面积，可以将处理重量提高到约10克/分钟。据认为，这种处理重量（10克/分钟）足以用于自习室。结果如下。1. 采用非电解法制备了直径为80 μ m的均匀孔。2. 使80 μ m以上粒度的形状分级成为可能。3. 处理重量已经有可能提高到约10克/分钟。4. 确定了筛网的转速、吸附压力、防静电性能、颗粒配比的最佳条件。5. 通过对分类的重复操作，取得了较好的分类效果。6. 我想用这个装置来完成一个自习室。

A shape classifier was made an experimental basis in the previous study (patent pending, 62-19450). This classifier applied well to a particle size of above 110 mum. However, it did not understand whether this classifier is effective or not in the case of smaller particles than about 110 mum.In this study, a production method of a circle hole screen was firstly improved, to carry out a shape classification of particles as small as possible than 110 m. Many holes of 100 mum in diameter on a thin stainless steel boad were opened by the etching method processing. And this screen was plated with nickel by the non- electolysis method processing. By this method, many uniform holes of 80 mum in diameter were got, although it was said that 100 mum was an under limit before now.By a development of this new screen, the shape classification of particles to about 80 mum in diameter have become possible. Also a processing weight have become possible to be raised to about 10 g/min, by expending a surface area of the screen. It is thought that this processing weight (10 g/min) is sufficient to use for a study room.The results are follows. 1. Uniform holes of 80 mum in diameter were got by using of the non-electolysis method processing. 2. The shape classification of above 80 mum of particle size have become possible. 3. A processing weight have become possible to be raised to about 10 g/min. 4. The optimum condition of the revolution velocity of the screen, the adsorption pressure, the prevention of static electricity, the mixture ratio of particles were defined. 5. Good results were got by a repeat operation of the classification. 6. I want to complete for a study room by incorporating this apparatus.