床是一种应用广泛的重选选矿设备，摇床选矿是利用机械的摇动和水流的冲洗的作用使矿粒按密度分离。摇床的显著特点是富矿比高，常用它获得**终精矿，同时又可分出**终尾矿，可以有效的处理细粒物料。 

摇床分选粒度上限为3mm，下限可到0.4mm，多用来分选1mm以下的物料。摇床的结构较复杂，操作不太方便，生产率也较低，占用厂房面积大。 摇床工作原理：  1.摇床分选过程 

由摇床给水槽给入的冲洗水，铺满横向倾斜的床面，并形均匀的斜面薄层水流。当物料（浓度为25%~30%的矿浆）由给矿槽自流到床面上，矿粒在床条或刻槽内受水流冲洗和床面振动作用而松散、分层。上层轻矿物颗粒受到较大的冲力，大多沿床面横向倾斜向下运动成为尾矿，这一侧称为尾矿侧。而位于床层底部的重矿物颗粒受床面的差动运动沿纵向运动，由传动端对面排出成为精矿，称为精矿端。不同密度和粒的矿粒在床面上受到的横向和纵向作用不同，**后的运动方向不同，而在床面呈扇形展开，可接出多种质量不同的产品。 2.重选摇床原理分析 

摇床分选是在床面和横向水流的共同作用下实现的，床面条或刻槽是纵向的，与水流方向近于垂直，水流横向流过时在沟槽内形成涡流，涡流和床面摇动的共同作用使矿砂层松散并按密度分层，重矿物转向下层，轻矿物转向上层，此过程成为“析离分层”，上层轻矿粒受到水流较大冲力，而下层重矿粒则受到较小冲力，因此轻矿粒在床面上横向运动速度大于重矿粒在床面上的横向运动速度。 

在纵向床面的差动运动不仅促进矿砂层松散分层，而且使重矿粒以较大速度沿纵向向前运动，使轻矿粒以较小速度向前运动。 

矿粒的去向取决于纵向速度和横向速度的合成速度，重矿物具有较小的横向速度和较大的纵向速度，轻矿物具有较大的横向速度和较小纵向速度，则把纵向和横向速度合成，可以看到，重矿物的合速度偏向摇床的精矿排矿端，轻矿物偏向摇床尾矿侧，中等密度的颗粒则位于两者之间，此过程称为运搬分带。 

Dressing shaking table working principle detailed instructions 

 

Shaking table is a widely used heavy choose the enrichment plant, the Shaking table is using machine processing the rocking of the flow and the role of the mineral grains to wash in density separation. The outstanding characteristics of Shaking table is high rich ore ratio, it often get the final ore concentrate, at the same time can tell finally tailings, can effectively deal with fine grain materials. 

Wave in the upper limit of particle size bed 3 mm to 0.4 mm, lower limit can be more than 1 mm to separation, the following materials. The structure of the Shaking table is relatively complex, operation is not very convenient, productivity is low, take up the area of factory building is big. 

Shaking table working principle: 1. The bed separation process wave 

The wave to sink into the bed to the water, rinse covered with lateral tilt of the bed surface, and form a thin layer of uniform cant flow. When the material concentration (25% to 30%) for ore pulp by slot on the bed, ore to their grains in bed or groove by article in water washing and bed surface vibration effect and loose, layered. The upper light mineral particles is large, most of the momentum along the bed surface horizontal slopes down campaign become tailings, this side called tailings side. In the bottom of the bed layer heavy mineral particles on the surface of the bed by differential movement along the longitudinal motion by the transmission, the discharge be opposite, called the concentrate concentrate. Different density and grain mineral grains in the bed surface of the vertical and lateral by different effect, and finally the movement direction of the different, and in bed MianCheng fan out, may meet the DuoZhong quality of different products. 2. Re-election wave principle analysis bed 

Wave in the bed in the surface of bed and transverse is flow under the common function of implementation, the surface of bed to go to bed a or groove is vertical, and flow direction perpendicular to the lateral flow through the water, water in groove is formed in eddy current, eddy current and the surface of bed shaking the common function of loose sａnd layer that by density stratified, heavy mineral turned to the lower, light mineral to upper level, the process become "XiLi layered", the upper light ore by large flow momentum, grain and the magnetic particles are smaller is heavy, so light mineral grains momentum in bed surface lateral movement speed is greater than the heavy ore grains in bed on the lateral movement speed. 

Vertical bed in the differential movement not only promote the loose sａnd layer layered, and make heavy mineral grains with the larger along the longitudinal forward movement speed, makes light of ore with a small forward movement speed. 

The magnetic particles to the longitudinal and transverse speed depends on the speed of the synthetic speed, heavy mineral lower horizontal speed and larger vertical speed, light mineral has large lateral velocity and smaller longitudinal velocity, the lateral and longitudinal speed synthesis, can see, heavy mineral and speed of the wave of the bed to concentrate the light mineral ore row, to bed side, medium wave tailings of density particles is located in between, this process is called carrying zoning.