床是一種應用廣泛的重選選礦設備，
搖床選礦是利用機械的搖動和水流的沖洗的作用使礦粒按密度分離。
搖床的顯著特點是富礦比高，常用它獲得**終精礦，同時又可分出**終尾礦，可以有效的處理細粒物料。
搖床分選粒度上限為3mm，下限可到0.4mm，多用來分選1mm以下的物料。搖床的結構較復雜，操作不太方便，生產率也較低，占用廠房面積大。 搖床工作原理： 1.搖床分選過程
由搖床給水槽給入的沖洗水，鋪滿橫向傾斜的床面，并形均勻的斜面薄層水流。當物料（濃度為25%~30%的礦漿）由給礦槽自流到床面上，礦粒在床條或刻槽內受水流沖洗和床面振動作用而松散、分層。上層輕礦物顆粒受到較大的沖力，大多沿床面橫向傾斜向下運動成為尾礦，這一側稱為尾礦側。而位于床層底部的重礦物顆粒受床面的差動運動沿縱向運動，由傳動端對面排出成為精礦，稱為精礦端。不同密度和粒的礦粒在床面上受到的橫向和縱向作用不同，**后的運動方向不同，而在床面呈扇形展開，可接出多種質量不同的產品。 2.重選搖床原理分析
搖床分選是在床面和橫向水流的共同作用下實現的，床面上床條或刻槽是縱向的，與水流方向近于垂直，水流橫向流過時在溝槽內形成渦流，渦流和床面搖動的共同作用使礦砂層松散并按密度分層，重礦物轉向下層，輕礦物轉向上層，此過程成為“析離分層”，上層輕礦粒受到水流較大沖力，而下層重礦粒則受到較小沖力，因此輕礦粒在床面上橫向運動速度大于重礦粒在床面上的橫向運動速度。
在縱向床面的差動運動不僅促進礦砂層松散分層，而且使重礦粒以較大速度沿縱向向前運動，使輕礦粒以較小速度向前運動。
礦粒的去向取決于縱向速度和橫向速度的合成速度，重礦物具有較小的橫向速度和較大的縱向速度，輕礦物具有較大的橫向速度和較小縱向速度，則把縱向和橫向速度合成，可以看到，重礦物的合速度偏向搖床的精礦排礦端，輕礦物偏向搖床尾礦側，中等密度的顆粒則位于兩者之間，此過程稱為運搬分帶。
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.
