FLY ASH HEATING APPARATUS AND MODIFICATION METHOD FOR FLY ASH UNDER APPLICATION OF FLY ASH HEATING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a fly ash heating apparatus enabling fly ash to be prevented from being changed into coarse particles and enabling unburned carbon contained in the fly ash to be sufficiently removed.SOLUTION: An outer heating type rotary kiln installed at a heating device S comprises a plurality of partition walls 1e vertically installed at an inner peripheral surface of a cylindrical part 1c to extend in an axial line direction and dividing an inner space of the cylindrical part 1c into a plurality of spaces; and plate-like lifter members 1f at a surface of the cylindrical part 1c of the partition walls 1e in its front side of a rotating direction and inclined in respect to the partition walls 1e to cause a near position side rather than a far position side to be spaced apart from the partition walls 1e in reference to an axis line A. The cylindrical part 1c is arranged to have a down-grade from a furnace tail part toward a furnace front part.SELECTED DRAWING: Figure 3