PURPOSE: To recover efficiently the latent heat of waste sintering gas by separating sintering pallets, oxidizing catalytically only the waste gas contg. high- concn. CO, and utilizing the combustion heat of oxidation.
CONSTITUTION: The pallets 3 are separated in a sintering machine of an iron ore equipped with a raw material charge port 1, an ignition furnace 2, and the pallets 3, and a waste gas having ≥0.5vol% CO concn. is sent into a CO oxidizing apparatus 9 from ducts 4-1 by a main blower 7 through a collecting duct 5, a dust collection equipment 6, and a heat exchanger 8. The CO in the waste gas is catalytically oxidized in the oxidizing apparatus 9, and the generated combustion heat of oxidation is recovered by a heat recovery equipment 10 and utilized. The waste gas after the heat recovery is discharged from a stack 21 through said CO oxidizing apparatus 9 and the heat exchanger 8. The waste gas having a low CO concn. is supplied along with combustion air to the pallets 3 by a blower 15 through the duct 4, collecting ducts 11 and 12, collecting ducts 16 and 17, and a hood 18.
SHIOBARA KATSUAKI
KOMATSU OSAMU
SATOU YOSHIYUKI
OAMA MASAMI
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