1998 Fiscal Year Final Research Report Summary
Development of a Wet Shape Separator for Fine Particles
| Project/Area Number |
09650823
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
化学工学一般
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| Research Institution | Toyama University |
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Principal Investigator |
YAMAMOTO Kenichi Toyama University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (60174786)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAJIMA Toshiaki Toyama University, Faculty of Engineering, Technical Official, 工学部, 技官(教務職員) (30262504)
SUGIMOTO Masunori Toyama University, Faculty of Engineering, Professor, 工学部, 教授 (70019165)
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| Project Period (FY) |
1997 – 1998
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| Keywords | Fine Particle / Wet Shape Separator / Developmental Research / Rotating Conical Disk / Rolling Friction / Separation Efficiency / Wet Particle Micro-feeder / Liquid Jet Flow |
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| Research Abstract |
1 . Introduction : In the development of functional materials, it has been revealed that the shape of the constituent particles is one of the most important factors affecting the quality of the matter. Desirably-shaped particles in a product, therefore, should be physically sorted and recovered preliminary to use as effectively as possible. In this study, for the purpose of separation of fine particles differing in shape, a new continuous wet shape separator was developed and its separation performance was tested using differently shaped binary solid mixtures of about 50- 250 mum in particle size.
2 . Wet shape separator developed : Spherical and non-spherical particles were simultaneously fed onto a slowly rotating conical disk in the separator filled with a dilute aqueous solution of a surfactant, and were recovered in the sampler under the disk. The shape separation mechanism of particles in the separator is based on the difference in trajectories between spherical and non-spherical particles resulting from their static rolling frictional characteristics on the disk.
3 .Experimental results : (1)Continuous shape separations could be performed using an operation of sweeping particles on the rotating conical disk by a jet of liquid. (2)Separation efficiencies of the separator depended on surface roughness of disk material, particle size, flow rate for sweeping particles, surface inclination angle, and rotational speed of conical disk and of separator. (3)Even the fine mixture of S0mum-sized particles could be effectively separated under the appropriate operating conditions. (4)A wet micro-feeder using the ultrasonic field in liquid was developed, and was found to be effective for feeding fine particles to the shape separator.
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