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从悬浮液中分出细颗粒或者根据它们的物理性质进行分级是许多工业部门存在的问题。随着颗粒的变细,颗粒周围液体呈现的表面拉力几乎抵消了颗粒的重力,结果就使颗粒需要很长时间才能通过液体介质沉降下来。本文介绍了用于分出这样细粒固体的连续离心分级机。这种设备是由一个旋转管所构成,悬浮液通过一个给矿管给入其中。两股矿流的连续分离可使颗粒沉降以后产生滑动运动。由于在排矿端装有一个环形套管,重而大的颗粒就从此孔排出,轻而小的颗粒就从中心管排出。用分离数(separation number)表示的分选效率在80％左右范围内,并可得到因次之间的关系用来表示分离数与各操作参数间的函数关系。深入研究了旋转管中两种物料混合物的连续分级,研究了按粒度和按比重分离的分选效率(它是回收效率与剔除效率的综合)。
Separating fine particles from a suspension or classifying them according to their physical properties is a problem that many industrial sectors have. As the particles become thinner, the surface tension exhibited by the liquid around the particles nearly cancels the gravity of the particles, with the result that the particles take a long time to settle through the liquid medium. This article describes a continuous centrifugal classifier for separating such fine solids. The device consists of a rotating tube into which the suspension is fed through a feed pipe. The continuous separation of the two streams of mineral water can produce a sliding motion after the sedimentation of the particles. As a ring sleeve is installed at the discharge end, heavy and large particles are discharged from the hole, and light and small particles are discharged from the central tube. The separation efficiency expressed in terms of separation number is in the range of about 80%, and the relationship between the orders is obtained to indicate the functional relationship between the number of separations and each operation parameter. In-depth study of the continuous grading of two material mixtures in a rotating tube, the separation efficiency by particle size and by specific gravity (which is a combination of recovery efficiency and rejection efficiency) was investigated.