Granulating equipment for difficult-to-granulate powder material using quicklime as binder

摘要

PROBLEM TO BE SOLVED: To provide a granulation facility capable of economically producing a granulation material of hardly granulable powders having the strength sustaining severe handling in a conveyance process while suppressing occurrence of moisture and dust due to high-volume addition of quick lime as a binder.SOLUTION: A granulation facility comprises: a primary granulator 2 supporting a drum 3 with built-in rod 4 for compaction by a suspension unit 7; a dispersion unit 8 dispersing a primary granulation material discharged from the drum 3; a secondary granulator 10 receiving the primary granulation material supplied via the dispersion unit into numerous launders 10b to rolling-granulate; and a sprinkler 9 replenishing moisture to a secondary granulation material. The primary granulator 2 is configured by mounting a vibration source 5 which vibrates the drum 3 by vibrating to a vibration acceleration of 6G or more at a maximum part at a position positioning disproportionately to a raw material charging port side from the drum center of a drum outer periphery. The secondary granulator 10 is used as a granulation facility connected to the drum 3 to be vibrated by the vibration source 5. The granulation of hardly granulable powders needing the addition of quick lime of 3% or more in a mass ratio is carried out using the above facility.SELECTED DRAWING: Figure 2