Abstract
Presence of non-metallic inclusions in steels are practically inevitable and deoxidation products are one of the main sources for such inclusions. The present investigation focuses on the study of non-metallic inclusions in Fe–Al–Si–O system by considering aluminium and silicon as deoxidizers. This investigation mainly deals with the amount, distribution and morphology of complex non-metallic inclusions in steel, generated during complex deoxidation of liquid steel by silicon and aluminium. Morphology and floatability of various complex non-metallic inclusions present in the system has been discussed based on the physical properties of these oxides. Dissolution of MgO from the refractory lining being unavoidable, the present paper also aims at understanding the mechanism, morphological and compositional evolution of ternary MgO–Al2O3–SiO2 type inclusions.
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