<報文>炭材内装コールドペレットの高圧移動層による還元

概要

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In order to clarify the applicability of the cold pellets to a shaft furnace for the production of direct reduced iron, cement-bonded cold pellets were produced as burden materials and some reduction experiments for the pellets were carried out by using a pressurized moving bed reactor in laboratory scale. It was found that the crushing strength of the pellet decreased remarkably in the moving bed during the reduction up to the reduction degree of 20%, however, the reduction of the pellets proceeded without unsuitable change of the shape and volume. From the reduction experiments, reducibility of the pellets was found to be better than that of fired pellets. The temperature in the moving bed was decreased by the endothermic reaction between oxidizing gas and char contained in the pellets. This disadvantage could be compensated by selecting appropriate experimental conditions. Therefore, because reduction potential was improved due to gasification, the overall reduction rate of the pellets in the moving bed was increased on the whole. Accordingly, it was essentially concluded that the cold pellets were effective burden materials for direct-reduction shaft furnace.Cold PelletDirect ReductionShaft FurnaceHigh PressureCarbon Solution LossReduction PotentialPore StructureEndothermic Reaction
東北大学の論文
1986-03-25