Mathematical Model Research And System Development Of Multiphase Equilibrium In Copper Flash Smelting

The copper flash smelting is a complicated process with high temperature and multiphase reaction, which coupling with multi-operational variables and reactions. The research of the mathematic model and computer simulation of copper flash smelting have been attaching importance by the metallurgy operator at all times.Based on the principle of Gibbs energy minimization and after analyzing the thermodynamics of copper flash smelting, the mathematical model of multiphase equilibrium of the copper flash smelting is established by the Rand algorithm. The multiphase equilibrium simulation system of copper flash smelting (MPES version1.0) with independent knowledge property right is developed. The instance shows that the mathematical model accord with the real copper flash smelting process well. Compared with practical product data, the absolute error of the percent content of Cu, Fe, S in the matte is 1.08, 1.36, 0.08 respectively, and the relative error is 0.0187,0.071,0.0038 respectively; the absolute error of the simulative percent content of Fe, SiO2, Cu in the slag is 1.22, 1.96, 0.55 respectively, and the relative error is 0.0432, 0.0661, 0.1871 respectively. Then the influence disciplinarian of the technical parameters on flash smelting process are discussed by the MPES version 1.0, and the relation curves between the flux ration, the enriched oxygen concentration, the oxygen consumption per ton concentrate, the temperature and the matter degree, the content of Cu in slag, the content of Fe3O4 in matter and slag et al. were output. Theory gist and practical guidance for further optimization of technical parameters is brought out.In the process of building the mathematical model of multiphase equilibrium of the copper flash smelting, considering the mechanical inclusion problem in copper flash smelting, the method of least squares to calculate suspension indices is advanced, and the multiphase equilibrium results are modified by the Nagamori mechanical inclusion equations. Meanwhile, the implication of the coexistence theory in the model was discussed. The results showed that the coexistence theory is a feasible academic model for calculating activity.MPES version 1.0 is developed under object-oriented Visual C#.NET and SQL Server Database, the system is good at the friendly flexible user-interface, convenient operation, run stability, general availability, as well as the upper practical value.