金材技研式連続製鋼法のシミュレーション

抄録

A mathematical model of the NRIM continuous steelmaking process has been developed on the basis of the assumption that the rate limiting step in the steelmaking reaction is mass transfer which is the function of flow rates of jetted oxygen and generated CO gas. Resistance constants in mass transfer equations and other system parameters used in the model are determined by the complex optimization method to get a good agreement with the actual data in steady state. Results applied for the start-up simulations for the NRIM process operations show that the model can represent the actual process with accuracy. This means that the parameter constants in steady state are available for the unsteady state simulation, so that the model can be used for an optimal designing of the continuous steelmaking process and for the development of the process control strategy. Moreover, the assumption that the gas flow rates have an important role for bath mixing can provide a valuable aid to understand the steelmaking reaction kinetics.