CONVERTER BLOWING END TIME OBJECTIVE MOLTEN STEEL TEMPERATURE SET DEVICE AND METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To set a proper converter blowing end time objective molten steel temperature by correctly obtaining a heat release amount from a molten steel after tapping to a ladle.;SOLUTION: When a molten steel blown by a converter is fed to a continuous casting machine through a secondary refining device, a converter blowing end time objective molten steel temperature is set by a computer system 5. A ladle temperature distribution state calculation part 7 continuously calculates the temperature distribution state to the thickness direction of the ladle by performing continuous heat transfer calculation in accordance with the using conditions of the ladle, reads the same, sets the converter blowing end time molten steel temperature in the heat transfer calculation, estimates the molten steel temperature by heat transfer calculation using an operation schedule and conveyance schedule in each process from the converter blowing end to the start of continuous casting, the converter blowing end time molten steel temperature and temperature distribution conditions to a ladle thickness direction, and, when a molten steel temperature difference between the estimated continuous casting start time molten steel temperature and continuous casting start time required molten steel temperature lies within a molten steel temperature difference allowance range, a fixed value is added to the converter blowing end time molten steel temperature, and it is set to a converter blowing end time objective molten steel temperature.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2017,JPO&INPIT