8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

The state of blast furnace (BF) campaign life and the erosion mechanism of BF hearth and bottom are summarized. According to the design and erosion conditions of hearth and bottom of a blast furnace with effective volume of 3200m3, a two-dimensional mathematical model was developed using the theory of heat transfer with ANSYS to monitor the erosion state of blast furnace’s hearth and bottom. The temperature field distribution of hearth and bottom was obtained at different stages of service, including the early state, the middle state, the mid to late state and the late state. The calculated erosion graph indicates that erosion line at 1150℃ was located under the iron notch and at the corner of the hearth and bottom, and the “elephant foot wear” was not obvious. Compare with the different situation of the temperature distribution and the location of the erosion line at 1150℃ of the hearth and bottom at different BF service period, the reason for the change were analyzed, and the influencing factors for hearth lining temperature were discussed.