文献类型：期刊文献

中文题名：微纳稀土颗粒精密分级实验及理论研究

英文题名：Precise Classification of Micro-Nano Rare-Earth Particles

作者：周子然[1];杨刚[1];葛晓陵[1];李菲[1];邹媛媛[2]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]大连理工大学热能与动力工程学院,辽宁大连116001

年份：2014

卷号：32

期号：4

起止页码：501

中文期刊名：中国稀土学报

外文期刊名：Journal of the Chinese Society of Rare Earths

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：微纳稀土颗粒;精密分级;颗粒间作用力;粒径公式

外文关键词：micro-nano rare-earth particles; precise classification; interactions between the particles; size law

摘要：通过研究微纳稀土颗粒湿法离心分级的原理,发现传统的离心分级与实验结果存在偏差,提出微纳颗粒离心分级过程受到颗粒间作用力的假设,建立了微纳稀土颗粒在离心分级中的受力模型。首先通过间接计算得到颗粒间作用力变化趋势,将其与实验结果对比,可验证颗粒间作用力影响颗粒在离心分级中的受力运动;通过将公式计算结果与实验结果对比,得到颗粒间作用力的大小取决于颗粒粒径、悬浮液质量分数和离心转速3个因素,最后推导出考虑颗粒间作用力的适合微纳颗粒的离心分级粒径公式,表明在离心分级理论中引入颗粒间作用力的理论可以更准确地描述微纳颗粒离心分级规律,对微纳颗粒的工业化精密分级具有很强的理论指导意义。
The wet centrifugal classification elements of micro-nano particles were studied. The deviations between traditional centrifugal classification with the experimental results were discovered. And the hypothesis of interaction presented between micro-nano particles in precise classification processes was proposed.A new model for the force in precise classification process of micro-nano rare-earth particles was developed. First,the trends of interactions of the particles through indirect calculated way and the experimental results were compared. It verified the interactions among the particles in force progress in a centrifugal classification. Through the comparison between calculation and the experimental results,it was obtained the force of interactions among the particles depending on the particle size,mass fraction of suspension and centrifugal speed. Finally the expression for particle size of centrifugal classification law was put forward on the basis of the interactions of the particles size law. It was verified again by the data of classification by gravity sedimentation experiments. It showed that the precise classification theory of interaction of the particles could be described as the rules on precise classification of micro-nano particles more accurately. And it made a highly theoretical significance on the industrialization of precise classification of micro-nano particles.