METHOD AND APPARATUS FOR PRODUCTION OF CONCENTRATED FLY ASH SLURRY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a concentrated fly ash slurry which enables efficient concentration of a fly ash slurry after floating separation to a concentration applicable to concrete materials.SOLUTION: A method for producing a concentrated fly ash slurry comprises adding water and a scavenger to fly ash containing unburned carbon and stirring, in a fly ash slurrying apparatus 2, to form a fly ash slurry, conducting floating separation of unburned carbon from the fly ash slurry supplied from the fly ash slurrying apparatus 2 in a floating separator 1 and then conducting gravitation sedimentation of particles in the fly ash slurry with unburned carbon floating-separated in the floating separator 1 in a concentration reservoir 3 to concentrate to a concentration of 55 mass% or higher.