Study on favorable matrix aspect ratio for maximum particle capture in axial high gradient magnetic separation
Study on favorable matrix aspect ratio for maximum particle capture in axial high gradient magnetic separation
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轴向高梯度磁分离中最大颗粒捕获的有利基质纵横比研究
DOI：
10.1016/j.mineng.2019.02.036
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发表时间：
2019-05
影响因子：
4.8
通讯作者：
Haoran Chu
中科院分区：
文献类型：
--
作者：
Yuhua Wang;Zixing Xue;Xiayu Zheng;Dongfang Lu;Xudong Li;Haoran Chu
高梯度磁分离技术在许多科学和工业领域有着广泛的应用。本文研究了轴向高梯度磁悬浮系统中，在基体横截面积相等的条件下，基体的最佳长径比。推导了不同情况下的颗粒捕集模型，提出了改变基体长径比γ（1/4 × 5）时适用于特定情况的颗粒捕集模型的选择方法。描绘并定量了各种条件下基质的颗粒捕获截面。颗粒捕获截面的水平尺寸和垂直尺寸分别随长径比的增大而增大和减小。粒子俘获截面积在达到磁化饱和之前和之后快速和缓慢地增加。存在一个有利的基质纵横比，在该纵横比下，颗粒捕获横截面积（颗粒捕获效率）达到最大值。有利的纵横比是感应相关的，并随着磁感应强度的增加而减小。在轴向高梯度磁悬浮的科学研究和工业实践中，可以根据研究结果选择合适的长径比基体，这对弱磁性微粒的回收是十分有利的。
High gradient magnetic separation (HGMS) has witnessed widespread application in many scientific and industrial fields. In this paper, the favorable aspect ratio of matrices in axial HGMS was investigated, providing that matrices’ cross-section area were equal. Particle capture models for different circumstances were derived and selection method of applicable particle capture models for specific conditions when varying matrix aspect ratioγ(1/4 ∼ 5) was put forward. Particle capture cross section of matrices under a variety of conditions were depicted and quantified. The horizontal and vertical dimension of the particle capture cross section increases and decreases with the increase of aspect ratio, respectively. The particle capture cross section area increases rapidly and slowly before and after reaching magnetization saturation. There exists a favorable matrix aspect ratio at which the particle capture cross section area (particle capture efficiency) reaches the maximum. The favorable aspect ratio is induction dependent and decreases with the increase of magnetic induction. In scientific studies and industrial practice employing axial HGMS, matrices with the favorable aspect ratio can be adopted basing on results of this investigation, which is quite beneficial for the recovery of fine weakly magnetic particles.
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