Rem-O-S Compound inclusions growth model

Abstract

The program Bi-Growth were used for simulating the formation of non-metallic inclusions (REM-O-S), and their growth. In the process of refining, the non-metallic inclusions are heterogeneous and create a mixture of different oxides or oxides and sulfides. These compounds are a consequence of the introduction of metals and ferroalloys in the form of complex deoxidants. The current work proposes a solution to the bi-growth of oxide and sulfide precipitates by focusing on the formation of precipitates after introducing REM to steel. Because high mixing energies are used during refining, the role of reactant diffusion into the reaction zone was neglected, and the system was treated as perfectly homogeneous in terms of chemical composition. Each precipitate was assumed to grow only on its surface, e.g REMxOy. In this case, the particle growth rate was found to depend solely on the concentration of all three components (REM,O,S).