人工高炉スラグ中の硫黄の状態および硫黄の偏析と初晶の形態の関連

概要

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State of sulphur in a synthetic blast furnace slag was investigated by visible and infrared absorptions, electron spin resonance (ESR) of ferric ion and S K_α X-ray emission spectroscopy. Morphology of primary phase and relation between sulphur segregation and morphology of primary phase were investigated by scanning electron microscope observation and X-ray microanalysis. From chemical shifts of S K_α X-ray emission spectra it was indicated that sulphur in the synthetic blast furnace slag are in the forms of S^<6+> and S^<2-> ions under weak (P_<O_2>≃10^<-3>atm) and strong (P_<O_2>≃10^<-8>atm) reducing conditions, respectively. The results of optical absorption and ESR measurements supported the fact that strong interaction between ferric and sulphur ions in the reducing condition is not attributed to Fe^<3+>-S^<2-> interaction but to simple oxidizing effect of sulphur. Morphology of primary phase, in most cases, was spherical. Segregation of sulphur was not always detected in primary phase.
社団法人日本鉄鋼協会の論文
1983-02-01