Insights Thermodynamic in Basic Oxygen Steel Making Process

Abstract

In this study, a thermodynamics model was developed for the basic oxygen steelmaking (BOS) process (combined top & bottom blown), which was used to calculate the transient carbon, silicon, manganese, and phosphorus contents, as well as their slag composition, for different input hot metal-carbon contents. The model considered three different zones, and the volume of different phases was calculated using the Equip module of the FactSage macro processing code. The results of the model showed that manganese, phosphorus, and iron oxidation rates were high for input hot metal with low carbon content (3%). Additionally, the model predicted transient metal composition, and metal bath temperature, which were similar to plant observations for input carbon percentages ranging from 4 to 4.5.