To provide a calculating device for calculating charging quantity of auxiliary saw materials into a converter which make the operation of the converter economical by suitably restraining the charging quantity of the auxiliary raw material in the min. limit.
At the time of deciding the quantity of the auxiliary raw material to be charged in order to approach the molten steel component concn. in the converter to a target valve, in this device, the optimization calculation is executed by using physical model under commiseration of a material balance and an equilibrium reaction. B this method, unevenness of the component concn. at the time of stopping the blowing can be reduced. As a result, the accuracy of the component to be adjusted can unlimitedly be approached to the upper limit value, and the economical operation of charging quantity of the auxiliary raw material can be attained by restraining the changing quantity of the anxiusiliar raw material suitably as min. as possible. Further, the ull of a physical model renewed in succession at each time of measuring the slag component becomes possible, and the accuracy is not lowered even by the change is operational condition.
KITAMURA AKIRA
OMORI TOMOMI
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