| 摘要 |
PROBLEM TO BE SOLVED: To estimate the carbon content in molten steel by analyzing CO, CO2 and O2 concentrations in the exhaust gas generated during decarburizing treatment and based on a correlation between the corrected CO+CO2 gas concentration calculated from the above values and the carbon content in the molten steel. SOLUTION: The waste gas sufficiently cooled and removing dust when passed through vacuum evacuating system 6, is introduced into a gas analyzing system 8 through a gas guiding tube 7 to analyze CO, CO2 and O2 concentrations. Air leaked amount is estimated from the O2 concentration obtained therein, and the CO gas and CO2 gas concentrations corrected by the air leaked amount are calculated. The correlation between this corrected gas concentration and the carbon content in the molten steel, is preobtained and the carbon content in the molten steel is estimated from this correlation.
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