| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a recovered amount of CO is not always maximized, even when a target value of a furnace pressure control system of a converter is made constant, or an estimated amount of an exhaust gas generated in the converter is controlled so as to coincide with a real gas volume. SOLUTION: This controlling method comprises: calculating (S11) coefficients relating to an exhaust gas flow model which expresses a relation between the furnace pressure (or a manipulated variable for adjusting the furnace pressure) and an exhaust gas flow, and to the CO concentration model which expresses the relation between the furnace pressure (or the manipulated variable for adjusting the furnace pressure) and the CO concentration in the exhaust gas; and determining (S14) the above target value of the furnace pressure (or the manipulated variable for adjusting the furnace pressure) so as to maximize (or increase) the predicted value for the amount of CO in the exhaust gas within set constraints. The parameters of the above each model are corrected (S16) on the basis of the errors between the predicted value and the measured value, whenever necessary. COPYRIGHT: (C)2004,JPO
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