| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for controlling a blowing end-point in a converter by which the oxygen feeding quantity from the halfway of the blowing to the blowing end-point is decided by using the technique fully different from the conventional technique so that component concentrations in the molten steel at the blowing end-point in the converter are hit to a target values highly precisely in the case of performing a molten-steel blowing by supplying oxygen into the converter. SOLUTION: Exhausted gas during blowing in the converter is analyzed and the component concentrations in the molten steel and the molten steel temperature at the halfway of the blowing, are assumed from this analyzed information. Based on the assumed component concentrations in the molten steel and the molten steel temperature, a vector showing a particularity in this blowing is decided from the molten iron condition and the blowing condition, and the blowing having a vector resembled with the vector of this blowing is selected from the past blowing actual result data base. Based on the selected plurality of resembled blowings, the approximated model for assuming the oxygen-feeding quantity, is made and the oxygen-feeding quantity obtained with this approximated model, is decided as the oxygen-feeding quantity to the completion of the blowing. COPYRIGHT: (C)2007,JPO&INPIT
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