Analysis And Research Of The Multi-factor Impacting On The Continuous Casting Steel Temperature Changes In Tundish

The temperature of tundish is an important factor in the production of casting. The level and stability of it have direct impact on casting slab's quality and productivity. To master the process of temperature drop regulations of casting tundish, will have a major role in guiding the temperature controlling of steelmaking process and parameters of casting production process. So the thesis takes the tundish casting process of Nanjing EAF factory for an example, establishes the temperature field model of tundish, analyzes the factors that affect the temperature drop and its characteristics, which has great practical significance.Firstly, this paper builds a three-dimensional heat-transfer model of tundish. According to the actual situation of working site, boundary conditions and initial conditions in different technological conditions, adding ladle cover or not, adding covering flux for example, are determined. Then this paper researches thermo physical parameters related and solve the model built by using ANSYS.Secondly, this paper analyzes the factors of affecting the tundish temperature changes.1) The influence of covering flux. After simulating the two kinds of alkaline covering flux and acid covering flux, this paper points out that alkaline covering flux have significant influence on the insulation of tundish, and when the thickness of coverage is greater than 30mm, although it will have a certain impact on the insulation of tundish, the consequence is not evident.2) The influence of the initial thermal state of the tundish. Comparing the beginning of the casting tundish preheat state with the continuous casting to achieve steady-state situation (fully pre-heating) thermal state of the tundish, there will have a big change in the temperature drop of the process.3) The influence of heat insulation layer's thickness of the tundish wall. Heat dissipation to the outside of tundish can be reduced by adding heat insulation layer, and thickening the heat insulation layers properly can influent tundish's heat preservation in a certain extent, but after a certain point, thickening the heat insulation layer doesn't have much impact on the effect of heat preservation.Finally, information platform of temperature flow is designed. The system can be used in process production, information management of temperature flow concretely, and the information can be displayed on the screen intuitively, which lay the foundation for the process temperature and energy consumption of the system.