In order to obtain the dynamic variation rule of the sulfur content of liquid steel inthe LF refining process, a complete mathematical model including a desulfurization kineticmodel and temperature model in the deep desulfurization process is presented, based on thepractical production and reaction mechanism of ultra-low-sulfur steel in a LF. The resultsshow that the calculated values of the sulfur content in liquid steel using the model fitthe experimental values well, and the relative error is less than 8%. The effects ofrefining slag on the desulfurization process are analyzed in this paper, which shows thatslag basicity is most important at the early and middle stages of the process, while slagweight is most important at the middle and late stages. The effect of the above factors onthe final sulfur content of liquid steel is further analyzed quantitatively. The simulatedresults provide a theoretical basis to segment control the refining process in order toachieve the maximum effect, improving efficiency, saving energy and reducingconsumption.
