The Numerical Simulation Study On Fluid-thermal Interaction Field Of The Molten Steel In Ladle

The temperature of molten steel is one of the main variables in steelmaking process.The ladle has big influence on temperature of molten as a main tool to store and transport it.Studing the variation of molten steel temperature in ladle thermal cycle with different operating conditions and parameters is important to control the molten steel temperature of the steelmaking process.The molten steel in the ladle of the heat cycle is flowing.The flow of molten steel influences its temperature.So the variation of molten steel shoudn not be studied without the molten steel flow.This paper studies the thermal-fluid interaction in the process of argon flowing,waiting and pouring.This paper analyses the regularity of distributiong with thermal flied and fluide filed of molten steel and the variation of molten steel with different operating conditions and parameters.This paper numerical simulates the fluid-thermal interation field of the molten steel in the process of argon flowing, waiting and pouring based on the100t steel ladle.First of all,determines the physical and renometric model and the physical parameters according to the data,analyses the heat process of argon flowing,waiting and pouring to determine the initial condition and boundary conditions of the model.Second,numerical simulates the fluid-thermal interaction field of argon flowing,waiting and pouring procession.Caoculates the regularity of distribution of thermal field and fluid field and the variation of molten steel temperature in the ladle.Finally,changes the argon flowing time and quantity,waiting time,thermal condition of ladle,cover agent,etc.Analyses influention on the fluid-thermal interaction field and temperature of the molten steel.Through the analysis of the simulation results we found,in the argon flowing process,with time increasing,the temperature of molten steel decends.But the thermal stratification of molten steel is receding.The quantity of argon is not important to the temperature of molten steel.There is a best quantity of argon in the process of argon flowing,exceed the best quantity,the use ratio will be decend.In the process of waiting,the temperature of molten steel is decending,the average tempertature drop is11℃during10min,the temperature drop during15min is about14℃. The temperature drop trendis gradually diminishing,the steady state ladle is more obvious.The temperature drop quickly when decending the temperature of packing.In same condition, adding cover agent can reduce5℃or so of the molten steel temperature drop.The most innfluencablef actor above is the initial tempreture of ladle.1200℃is a appropriate temperature ofladle.In the process of pouring,the temperature is decending with time increasing, temperature stratification is decending because of flow circulation, but the average temperature difference value layered always remain the same, for about13℃...