Abstract
New needs about on-line analysis of Mn concentration have been arose in association with the decrease of the quantity of slag in the basic oxygen furnace drastically. In the JFE steel, a trial to determine the Mn concentration in molten steel by an atomic absorption spectrometry focusing on the atomic vapor that exists on the molten steel surface has been examined.In this work, the radiant light spontaneously generated from the molten steel surface of a high temperature state was used as a light source. As an experiment result, it was found that direct determination of the Mn concentration in the molten steel by this law was possible since measured Mn absorbance correlated with Mn concentration up to 3% in molten steel.
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