| 摘要 |
<p>PURPOSE:To reduce NOx and CO2 gas contents in sintering exhaust gas without requiring the fuel of powdery coke, etc., by utilizing the combustion heat of metallic iron as the heat source for sintering, at the time of producing the sintered ore by using the iron ore. CONSTITUTION:At the time of producing the sintered ore as the raw material for blast furnace by sintering the powdery iron ore, lime stone, etc., the powder of the metallic iron is added to the mixed material of the iron ore and the lime stone and laid on a sintering bed in a sintering apparatus, and hot blast is supplied from hoods 5, 7 at the upper part. Then the mixed raw material is sintered by oxidation of the metallic iron in the mixed raw material and the high temp. gas with combustion reaction to produce the sintered ore as the raw material for blast furnace. In this case, the high temp. exhaust gas sucked from the end part 1 of the sintering bed is supplied in the raw material from the first hood 5 through a heat exchanger 4 as the clean high temp. hot blast having small quantity of NOx, CO2, etc., after removing the contained solid material through collector 2, 3. Further, the clean air from a blower 6 is heated in the heat exchanger 4 and supplied to the raw material layer from the second hood 7.</p> |
