低 SiO_2 焼結鉱の製造と高炉操業への影響(高炉操業)(<特集>製銑技術の拡大と高度化)

概要

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Sintering technology with decreasing SiO_2 content from 5.6% to 4.9% at Kobe Works has been achieved based on the following concept. The desirable structure of quasi-particles for low SiO_2 sinter should consist of limonite ores as nucleus and fine ores of low SiO_2 and Al_2O_3 contents as adhering particles. In addition, basicity and MgO content of sinter should be increased. Consequently, the RDI value of sinter became high and its yield slightly became low, though the reducibility and high temperature property of sinter were improved. The use of low SiO_2 sinter at Kobe No.3 blast furnace has increased overall permeability by increasing permeability at the lower part of the furnace in spite of lower permeability at the upper part of the furnace, which has contributed to appreciable increases in ore/coke ratio and injection rate of pulverized coal.
社団法人日本鉄鋼協会の論文
1987-11-01