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弹跳拣选机(Leap-bound picker)最初设计以干式分选方法回收有价矿物,其粒度范围为-65～+15mm,这种矿物以前用普通方法很难经济地进行拣选。弹跳拣选机的结构由给矿溜槽、旋转的弹性圆筒和产品槽组成。该拣选机被制造成下列各项是容易调控的,即旋转弹性圆筒的转速、给矿溜槽的长度和倾斜角度、溜槽下端和弹性圆筒顶端之间的下落距离。弹跳拣选机的分选原理是墓于矿物的物理性质如摩擦系数、反弹比、形状和比重的差别。在这项研究中,测定了滑石、白云石、煤(无烟煤)和煤页岩等四种矿物的物理性质,以便弄清楚分选机理。以动力学为基础在理论上对分选机理作了探讨。
Leap-pick pickers were originally designed to recover valuable minerals by dry sorting, with a particle size range of -65 to +15 mm, which was previously difficult to economically sort by conventional methods. The structure of the hopper picker consists of a feed chute, a rotating flexible cylinder and a product tank. The picker is manufactured such that the rotational speed of the rotating flexible cylinder, the length and inclination of the feeder chute, and the drop distance between the lower end of the chute and the top of the flexible cylinder are easily adjusted. Bouncing sorting machine sorting principle is the tomb in the physical properties of minerals such as friction coefficient, rebound ratio, the difference between shape and proportion. In this study, the physical properties of four minerals, talc, dolomite, coal (anthracite) and coal shale, were determined in order to clarify the sorting mechanism. Based on the kinetic theory, the sorting mechanism is discussed theoretically.