鉄鉱石焼結過程で生成する融液の化学組成および粘度の評価(融液の性質と制御,焼結その2,<特集号>製銑プロセスの環境調和・資源対応力強化を目指して)

概要

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The viscosity of the melts formed in the sintering reaction was measured for evaluating the fluidity of the melts, which play a crucial role in the sintering process. Using the sphere draw-up method carried out the measurements of high temperature viscosity. With low-melting point compositions of the Fe_2O_3-CaO-SiO_2 system, the viscosity of high SiO_2 content melts (Fe_2O_3/CaO/SiO_2=38.5/34.5/27.0 weight basis) was 5 times higher than that of low SiO_2 content melts (Fe_2O_3/CaO=80/20). The viscosity of low SiO_2 content increased with addition of Al_2O_3 and SiO_2. Similarly, with melt compositions generated from actual ores, viscosity depended on the contents of Al_2O_3 and SiO_2. Based on the results, the viscosity of the melted liquid was estimated from the chemical composition, and the viscosity of the solid-liquid coexistence phase was also evaluated using a viscosity calculating equation for suspensions. The viscosity distribution of the solid-liquid coexistence phase at 1300℃ in the ternary composition system Fe_2O_3-CaO-SiO_2 was obtained.
社団法人日本鉄鋼協会の論文
2006-12-01