焼結プロセスにおける燃料性状の排ガスダイオキシン類濃度に及ぼす影響

概要

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The various factors have been pointed out which affect the dioxin emissions from the iron ore sintering process. One of the significant factors is solid fuel. It has been reported that metallurgical coke, which is the major fuel, gives the higher emissions than other carbonaceous materials, e.g., anthracite, coal, activated coke and coal. In this study, the effect of solid fuel on the dioxin emissions was experimentally studied in detail by a sinter pot test. The various coke samples corrected from different steel works were examined together with other carbonaceous materials. The effects of different pre-treatments to the coke samples, e.g., crushing, water or solvent rinsing, composting with a chloride and pre-heating in nitrogen, were further examined. The results of the present study suggest that although the other substances complicatedly affect also to the formation/decomposition and transportation of dioxins in the sintering bed the properties of solid fuel directly and indirectly affect to the emissions. For instance, increase of the mixing ratio of coke, especially finer size ofparticles, increases the emission; and contrary; the water rinsing and preheating of coke decrease the emissions. The effect of nitrogen contained in the solid fuel is also discussed.
社団法人日本鉄鋼協会の論文