Study on the demarcation of applied magnetic induction for determining magnetization state of matrices in high gradient magnetic separation
Study on the demarcation of applied magnetic induction for determining magnetization state of matrices in high gradient magnetic separation
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高梯度磁分离中外加磁感应强度确定基质磁化状态的研究
DOI：
10.1016/j.mineng.2018.08.005
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发表时间：
2018-10
影响因子：
4.8
通讯作者：
Dongfang Lu
中科院分区：
文献类型：
--
作者：
Yuhua Wang;Danxiao Gao;Xiayu Zheng;Dongfang Lu
高梯度磁选技术在科学和工业领域有着广泛的应用。在达到磁化饱和前后，HGMS中基质的性能变化很大。在以往的研究中，已经建立了不饱和和饱和基质的颗粒捕获模型。仍然存在的问题是，如何确定外加磁感应的界限，以便在具体研究中选择正确的捕获模式。这对于研究基质形状(长径比)对HGMS中基质性能的影响具有重要意义。本文通过数值模拟和理论计算相结合的方法，研究了外加磁感应强度增加时圆形矩阵的磁化过程。提出了一种确定分界点的简便方法。基体内部磁感应强度在达到饱和前等于磁化强度，达到饱和后与外加磁感应强度具有相同的增长速率。基质的退磁为饱和前后磁化强度的一半。利用内磁感应强度考察了粒子捕获模型中所采用的系数在整个外加磁感应范围内的有效性，旨在确定选择合适的粒子捕获模型的分界点。结果表明，圆形基质ISMS/2的外加磁感应强度的划分。当外加磁感应强度低于和高于ms/2时，应选择非饱和和饱和基质的粒子俘获模型。
High gradient magnetic separation (HGMS) has been widely applied in many scientific and industrial fields. The performance of matrix in HGMS varied greatly before and after reaching magnetization saturation. Particle capture models of unsaturated and saturated matrices had been established in previous studies. Problems remained that how to determine the demarcation of applied magnetic induction for selecting the right capture models in specific studies. This is remarkably essential for the investigation of effect of matrix shape (aspect ratio) on performance of matrix in HGMS. In the present paper, magnetization process of circular matrix with increasing applied magnetic induction was investigated through numerical simulation and theoretical calculations. A convenient method to determine the demarcation point was proposed. The internal magnetic induction of matrix is equal to magnetization before reaching saturation and has the same growth rate as applied magnetic induction after reaching saturation. The demagnetization of matrix is half of the magnetization before and after reaching saturation. Validity of the coefficients adopted in the particle capture models in the whole range of applied induction is investigated with the internal magnetic induction, aiming to determine the demarcation point for selecting the right particle capture models. Results showed that the demarcation of the applied magnetic induction for circular matrix isMs/2. Particle capture models of unsaturated and saturated matrix should be selected when applied magnetic induction is lower and higher thanMs/2, respectively.
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影响因子：
4.8
作者：
Xiayu Zheng;Yu-hua Wang;Dongfang Lu
通讯作者：
Xiayu Zheng;Yu-hua Wang;Dongfang Lu
影响因子：
2.1
作者：
Xiayu Zheng;Nana Guo;R. Cui;Dongfang Lu;Xudong Li;Mao-lin Li;Yu-hua Wang
通讯作者：
Xiayu Zheng;Nana Guo;R. Cui;Dongfang Lu;Xudong Li;Mao-lin Li;Yu-hua Wang
影响因子：
--
作者：
Tripathy, Sunil Kumar;Singh, Veerendra;Suresh, Nikkam
通讯作者：
Suresh, Nikkam
影响因子：
1.8
作者：
N. Nomura;F. Mishima;Y. Akiyama;S. Nishijima
通讯作者：
N. Nomura;F. Mishima;Y. Akiyama;S. Nishijima
影响因子：
--
作者：
Yu Jianwen;Han Yuexin;Li Yanjun;Gao Peng
通讯作者：
Gao Peng