Continuous fluidized-bed granulating apparatus

Abstract

In a fluidized-bed granulating apparatus for continuously producing granular particles from a powdered raw material, while a granulated product is continuously exhausted in a substantially constant amount from the bottom or bottom side wall of a fluidizing chamber and is introduced into a classifying section where the granulated product is classified by classifying means thereby selecting and delivering the granules granulated to particle size greater than the desired size and returning ungranulated material to the fluidizing chamber, the pressure drop of the fluidized bed is detected to adjust the charging rate of the powdered raw material into the fluidized bed and the moisture content of the material to be granulated in the bed is detected to adjust the feed rate of a binding liquid, thereby producing a granulated product of a desired particle size. Also, the amount of heat supplied to the fluidized bed is adjusted in accordance with the integration ratio between the charging rate of the powdered raw material and the feed rate of the binding liquid (liquid/powder ratio), thereby setting a liquid/powder ratio freely.

Dependencies are inferred from the claim text.