超导线圈对于强磁分选应该是有可应用的优点的。一些作者曾经讨论了各种设计并引证了有关的初步经验。人们曾用线圈的特殊配置(例如四极配置)以及在螺线管内充填铁磁性介质的办法产生不均匀磁场。本文讨论了一种连续操作的新磁选机原理,它由数个螺线管组成,并且不充填介质。磁选机的结构如下述: 数个短而厚的螺线管沿轴向排列,线圈彼此间有一定的距离,激磁电流的方向要使线圈磁场的极性相反。线圈产生一个轴向对称的不均匀强磁场和方向向外的径向磁力。磁力在线圈系附近最强;在轴线处降至零。待选的物料通过磁选机轴向流入一个具有环形横断面的圆柱状容器。磁化率较高的颗粒在容器壁附近富集。在容器的末端,矿浆流为一分流板分成两部分,靠外部分是精矿;靠里边的是尾矿。本文将讨论有关的设计和操作;并给出有关磁场和力场以及磁选试验所得初步结果的某些资料。 Superconducting coils for magnetic separation should be able to apply the advantages. Some authors have discussed various designs and cited relevant preliminary experiences. Non-uniform magnetic fields have been generated by the special configuration of coils, such as quadrupole configurations, and the inclusion of ferromagnetic media in solenoids. This article discusses a new principle of continuous operation of a new magnetic separator that consists of several solenoids without filling with media. The structure of the magnetic separator is as follows: Several short, thick solenoids are arranged in the axial direction with a certain distance between them. The direction of the magnetizing current is opposite to that of the magnetic field of the coil. The coil produces an axially symmetrical, non-uniform, strong magnetic field and a radial outward magnetic force. The magnetic force is the strongest near the coil system; it drops to zero at the axis. The material to be selected flows axially through the magnetic separator into a cylindrical container with a circular cross section. Particles with higher magnetic susceptibility are enriched near the vessel wall. At the end of the vessel, the flow of the slurry is split into two parts by a manifold and the concentrate by the outer part; the tailings by the inside. This article discusses the design and operation involved; and gives some information on the magnetic and force fields and the preliminary results of magnetic separation tests.