In order to improve the rotating-flow-plate separator to remove smaller particles at higher gas velocities

especially for preheating cement raw mix

a series of three-dimensional measurements were conducted and the experimental results were analyzed. Based on the flow profiles thus elucidated

the following improvements were made: a baffle plate was installed around the rotating-flow-plate to prevent particles from backflow

and a rib along the wall of the separator was added to counteract dust-ring whirling near the wall. These improvements resulted in lowering the critical diameter of the particles separated to 10-15μm at a gas velocity of 3 m/s. Formulae for critical particle diameters and data on pressure drop of the improved separator are presented.