METHOD FOR SEPARATING UNBURNED CARBON IN FLY ASH

摘要

Provided is a method for removing unburned carbon that, by adjusting the amount of a collecting agent added according to unburned carbon content in fly ash, not only prevents oversupply of said collecting agent but also maintains the separability of the unburned carbon and reduces the burden on the worker involved in adjusting operation parameters. With a method for separating unburned carbon in fly ash, wherein a collecting agent (k) is added to a slurry (f2) formed by adding water (w) to fly ash (f1); a shear force produced by rotating shear blades (4a) is applied; then a foaming agent (b) is added and air is supplied to said slurry (f4) to generate foam; and unburned carbon (c1) in the fly ash adheres to said foam so that it floats; in the method that separates flying ash (f6) and unburned carbon (c1), the amount of unburned carbon in the fly ash (f1) to which water was added to form slurry (f2) is measured, and the amount of collecting agent (k) added is adjusted.