Thermodynamic Modeling of Oxygen Bottom-Blowing Continuous Converting Process

Abstract

Recently, replacing Pierce-Smith converting process with the oxygen bottom-blowingBottom-blowingcontinuous convertingContinuous convertingtechnology has become a new research focus. Based on the principle of Gibbs free energy minimizationGibbs free energy minimization, the thermodynamic modelModelof oxygen bottom-blowingBottom-blowingcontinuous convertingContinuous convertingmultiphase equilibriumMultiphase equilibriumsystem has been established. The elements distributionDistributionbehavior is calculated at the same burdenBurdencomposition and operation parameters as the industrial production. The results show that the absolute errors of the mass fraction (wt%) of Cu, Fe, S, Pb, Zn, As, Sb, Bi in crude copperCopperare 0.06, 0.0030, 0.070, 0.38, 0.39, 0.020, 0.017, 0.034, 0.010, respectively, and the absolute errors of the mass fraction (wt%) of Cu, Fe, S, Pb, Zn, As, Sb, Bi in slagSlagare 0.53, 0.81, 0.020, 0.23, 2.5, 0.0048, 0.0010, 0.0030, 1.49, respectively. The calculated results agree well with the actual industrial production data, indicating that the modelModelcan be well applied in the oxygen bottom-blowingBottom-blowingcontinuous convertingContinuous convertingpractice.