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用常规的重介质在高密度（＞3g／mL）的情况下进行分选是较困难的，这就导致了磁流体静力分选机的开发和改进．磁流体静力分选技术就是根据物料颗粒在磁场作用下的磁流体中的相对密度（及磁化率）进行的分选．在该领域的大多数研究一直集中在开发工业生产使用的连续式磁选机上．本文将介绍一种通过对弗朗茨（Frantz）等磁力磁选机的改进而制造的实验室间断磁选机。该磁选机可根据物料颗粒的相对密度，对粗颗粒物料（600～850μm）进行快速分选．该磁选机还可用于“重液”分析．
Sorting with conventional heavy media at high densities (> 3 g / mL) is more difficult, leading to the development and improvement of MHD separators. Magnetic fluid static separation technology is based on the material particles in the magnetic field under the magnetic fluid relative density (and magnetic susceptibility) for sorting. Much of the research in this area has focused on the development of continuous magnetic separators for industrial production. This article describes a laboratory interrupter that has been manufactured with the improvements of a magnetic classifier such as Frantz. The magnetic separator can be based on the relative density of the material particles, coarse particles of material (600 ~ 850μm) for rapid sorting. The magnetic separator can also be used for “heavy liquid” analysis.