摘要
Process models are very useful to control high efficient industrial metallurgical processes.However their accuracy depends strongly on the choice of boundary conditions and thermodynamic as well as kinetic data used. Whereas the commercial data base FactSage or Thermocalc is used as the source of thermodynamic data the kinetic parameter are characteristic for each process and process design.Therefore it is essential to estimate the kinetic parameter in well designed experiments supported by using of numerical methods. In this paper the steel melt flow parameter,gas-melt interfacial area and mass transfer coefficient obtained in 30t industrial gas stirred ladles are described.On the example of nitrogen absorption and desorption the predictive process model for nitrogen control while ladle treatment and decarburisation process is presented for different steel alloys.The modelling results are compared with results from industrial processes.
Process models are very useful to control high efficient industrial metallurgical processes.However their accuracy depends strongly on the choice of boundary conditions and thermodynamic as well as kinetic data used. Whereas the commercial data base FactSage or Thermocalc is used as the source of thermodynamic data the kinetic parameter are characteristic for each process and process design.Therefore it is essential to estimate the kinetic parameter in well designed experiments supported by using of numerical methods. In this paper the steel melt flow parameter,gas-melt interfacial area and mass transfer coefficient obtained in 30t industrial gas stirred ladles are described.On the example of nitrogen absorption and desorption the predictive process model for nitrogen control while ladle treatment and decarburisation process is presented for different steel alloys.The modelling results are compared with results from industrial processes.
