| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1989: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Research Abstract |
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.
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