A mathematical model is developed to evaluate quantitatively the effects of circulatory flow rate in the refining processes. In the model the circulatory flow rate is only one adjustable parameter. By use of the mathematical model, the concentration profiles of C and Si are simulated in LD converters with different capacities, a Q-BOP and electric furnace, and furthermore the circulatory flow rates are determined for these plants.
The relations between the circulatory flow rate and the gas blowing rate in LD converter are theoretically discussed on the basis of the results of the water model experiments, for determining the "mixing time".
Hitherto, a factor (ISCO) which was proposed to explain the oxidation reactions in the refining processes have been induced from the model of this paper.