重介质粉选矿就是把粉碎到一定粒度的矿石,放入到密度大于水的流体(即重介质)中,根据浮力原理,密度小于介质的矿粒就会浮起,而密度大于介质的矿材就会沉下,分别截取两种产物,就实现了重介质选矿。由此可见,重介质选矿完全属于静力作用过程,流体的运动和颗粒的沉降不再是分层的主要作用因素,而介质本身的性质倒是影响选别的重要因素。在强斯水砂选煤法之后,世界上很快就出现了利用磁铁矿、重晶石、黄铁矿和黄土之类重介质的选煤方法。第一次出现用磁铁矿矿悬浮液作重介质选煤的方法是在1922年(康可林选煤法)。1936年特鲁姆在荷兰用磨细的磁铁矿悬浮液选煤,并利用磁铁矿的沉降在分选机中形成不同的密度进行分选。但是磁铁矿重介选煤过程真正得到广泛应用只是在采用磁选机回收复用磁铁矿之后。
Heavy media separation is crushed into a certain particle size of ore, into the density is greater than the water in the fluid (i.e., dense medium), according to the principle of buoyancy, the density is less than the medium particles will float, and the density is greater than medium ore material will sink, intercept respectively two kinds of product, it realized the heavy media separation. Thus, the heavy media separation completely belongs to static process, the fluid movement and the settlement of particles are no longer a layered main effect factors, and the nature of the medium itself is choose other important factors. After the strong, water sand coal preparation method, soon appeared in the world and utilization of magnetite, barite, pyrite and loess dense medium coal preparation method. First appeared in magnetite ore slurry dense medium coal preparation method is (kang Lin Xuan coal method) in 1922. 1936, groom with coal grinding fine magnetite suspension in the Netherlands, and use the settlement of magnetite formed in sorting machine of different density separation. But magnetite really dense medium coal preparation process widely used only after using magnetic separator recycles 60 magnetite.
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