This paper mainly study the thermal behavior of the ladle in the turnover process by measuring and re-cording the temperature of the outer shell and inner chamber of a steel ladle at different position with different ladle ages.In DG-KR-BOF-CT process,the average ladel turnover time is 68.01 min.At the time of the molten steel out of the argon,the ladle shell reaches the highest temperature and the average value is 274.75℃.The temperature of ladle shell shows an upward trend in the low ladle age stage,with an average heating rate of 0.22℃/min.With the increasing of ladle age,the heating rate of ladle shell shows a downward trend and the heating rate is 0℃/min at the age of 18th,indicating that the ladle refractory reaches thermal saturation at this time.In the stage of full ladle,the average temperature decrease at the rate of 1.80℃/min,and the heat released from the ladle accounts for 91.69％of the temperature drop of the molten steel.In the stage of empty ladle,the heat lost in one minute equal to 1.10℃/t of the steel,which is the main heat dissipation of the ladle mouth,accounting for 86.55％.
维普
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