Abstract： Taking the fine residual carbon powders as raw materials, the fluidization characteristics in riser and separation characteristics in cyclone were researched using a founded cold test rig. The results show that the fine residual carbon powders are elutriated considerably when the superficial velocity is greater than 0.5 m/s, and transported entirely in the riser when the superficial velocity is greater than 0.9 m/s. The cyclone pressure drop decreases with the increase of inlet solid loading and approaches to a fixed value finally. There is a good agreement between experiment values and calculated values of the cyclone efficiency. The efficiency with different inlet solid loading is larger than 97.5% due to the particle agglomeration and sedimentation of the fine residual carbon powders.

Keywords: fine residual carbon powder; fluidization; separation; transportation