研究了振动流化床的流化特性及分选性能，分析了矿粒在振动流化床中的受力情况，分析了影响矿物按床层密度分层的主要参数，揭示了振动流化床的分选机理。
The force acting on mineral particle in VFB was specially analysed, and the main parameters interfering the separation of mineral according to bed density were also studied.
振动槽的振动频率和振幅的乘积愈大，振动速度愈大，矿粒在磁场中停留时间愈短。
Vibration trough of vibration frequency and amplitude of the product is larger and the vibration velocity is larger, the mineral grains in magnetic field stay shorter.
用统计数学中的F-分布描述分层后的矿粒在溜槽径向的再分布，然后将两者结合建立能完全描述矿粒在螺旋溜槽中分选行为的随机数学模型。
Moreover, the re-distribution of stratified particles along the radial direction of the sluice is further described by using the F-distribution of statistical mathematics.
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