Based on practical production data of steelmaking process for 304 stainless steel by a 45 t AOD-L unit

according to system modeling

conservation of mass and energy

and thermodynamic principle

a processing model (AOD M&H) for austenite stainless steel steelmaking by AOD process has been established including four levels: operation

chemical reaction

metallurgy and energy computation with 469 variables. With 139 input variables including amount

ingredient and temperature of each material

the 39 output variables such as chemical composition and temperature of liquid steel etc. can be calculated by the model. Application results showed that the relative error of carbon content and temperature of liquid steel in each phase of steelmaking process between calculated and measured value was ≤11. 1 %.