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Development of a Wet Shape Separator for Fine Particles

细颗粒湿式形状分离器的开发

基本信息

批准号：
09650823
负责人：
YAMAMOTO Kenichi
金额：
$ 2.18万
依托单位：
Toyama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650823/
关键词：
Fine Particle Wet Shape Separator Developmental Research Rotating Conical Disk Rolling Friction Separation Efficiency Wet Particle Micro-feeder Liquid Jet Flow 湿式形状分離装置微量定量供給残留粒子排除傘型回転円板転がり摩擦特性

项目摘要

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.

1.前言：在功能材料的发展过程中，人们发现组成粒子的形状是影响物质质量的最重要因素之一。因此，产品中理想形状的颗粒应在物理上进行分类和回收，以便尽可能有效地使用。本研究针对不同形状细小颗粒的分离，研制了一种新型湿式连续分离器，并对其在50~250微米不同形状的二元固体混合物中的分离性能进行了测试。研制的湿式分离器：在装满表面活性剂稀水溶液的分离器中，球形和非球形颗粒同时进料到缓慢旋转的锥形圆盘上，并在圆盘下的取样器中回收。该分离器中颗粒的形状分离机理是基于球形颗粒与非球形颗粒在圆盘上的静态滚动摩擦特性造成的轨迹差异。3.实验结果：(1)利用液体射流在旋转的圆锥盘上扫掠颗粒的操作，可以实现连续的形状分离。(2)分离器的分离效率取决于圆盘材料的表面粗糙度、颗粒大小、扫粒流量、表面倾角、圆锥盘和分离器的转速。(3)在适宜的操作条件下，即使是最小颗粒的细小混合物也能得到有效的分离。(4)研制了一种利用液体中超声场的湿式微给料器，成功地实现了细小颗粒向板形分离器的进料。