多段螺旋溜槽的选别特点是在设备内部形成贫富分选和分级分选流程。
The separation by the multi-stage spiral sluice is characterised by the formation of a flowsheet of leanrich separation and classification separation in the internal of the equipment.
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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