State Analysis on Sulphur Ion in a Synthetic Blast Furnace Slag(Materials, Metallurgy, Weldability)

概要

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State of sulphur in synthetic blast furnace slag was investigated with visible-near infrared absorption, electron spin resonance and S K_α emission X-ray spectroscopy. Further, morphology of primary phase was observed with scanning electron microscope. Chemical shift in S K_α emission X-ray spectrum supported the result reported by Richardson et al. From the results of visible-near infrared absorption and electron spin resonance measurements, strong interaction between ferric and sulphur ions was indicated. However, further investigation is required for determination of the structure around iron. Morphology of primary phase, in most cases, was spherical though depending upon the additional form of sulphur. The clear relationship between partial oxygen pressure and morphology of primary phase could not be determined. Richness of sulphur was not always detected in primary phase, so that it can be considered that segragation of sulphur is not always effective to the crystallization of the slag.
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