METHOD FOR PREDICTING MIXING DEGREE OF STEEL TYPES DURING SUCCESSIVE CONTINUOUS CASTING OF DIFFERENT STEEL TYPES

摘要

PURPOSE: A method for predicting a mixing degree of steel types during successive continuous casting of different steel types is provided accurately and easily predict a mixed concentration of steel types depending on time by calculating a mixed concentration of steel types in a Tundish using interpolation and extrapolation of the total average concentration and a mixed concentration of new steel types. CONSTITUTION: The method comprises a first step (S1) of setting initial values on time, mixed concentration of new steel types, total average concentration of a Tundish, mixed concentration of steel types of outlet and total weight of molten steel; a second step (S2) of calculating a total weight of the molten steel flown into the Tundish depending on time; a third step (S3) of calculating a total average concentration of the Tundish in which new steel types and the previous steel types are mixed, wherein the new steel types are flown into the Tundish according to the change of time; a fourth step (S4) of calculating a mixed concentration of steel types discharged through the outlet; and a fifth step (S5) of terminating calculation when the calculated mixed concentration after the fourth step (S4) is more than 0.99, and repeating the second, third and fourth steps (S2,S3,S4) by adding a value of the setting time plus a specific time to the value set in the first step (S1) when the calculated mixed concentration is less than 0.99.