... of the vertical screw hopper. 2. Fluidized bed Jet Mill: fluidized bed jet mill, the mill body is very small, ... there are total three air nozzles to the mill, see the mill bottom, there are three red air pipe ... in top of the mill, and this wheel is drived by a water cooling high speed motor. This ... 5. Control part: This lab fluidized bed jet mill is automatically operated by the PLC control, this ...