通过筛板周期地鼓入上升水流，使床层升起松散，接着水流下降(或停止上升)。
Upward flow is injected via screen plate periodically, allowing the lift of bed layer to be loose and flow to drop (or stop rising).
本文分析讨论了流化床固体体积浓度的致密作用特点，以及流化床中强制搅拌和上升水流对结团造粒过程的动力作用。
The densification of the solid volume concentration in fluidized bed reactor and the kinetic action of forced stirring and upward water flow to the cluster granulation in fluidized bed are discussed.
加强磁场强度以增加对磁性矿物的回收和加强切向给入的上升水流的强度以加强对非磁性矿物的淘洗，提高精矿品位；
The water and the magnetic must be improved and strengthen, so that the recovery of the magnetic mineral and the Fe concentrate grade is improved.
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