Effect of Al<sub>2</sub>O<sub>3</sub> and TiO<sub>2</sub> Contents in the Refining Slag on Al and Ti Contents of Incoloy825 Alloy

During the refining process of Incoloy825 nickel-based alloy, reaction between slag and Al Ti in alloy can result oxidation loss. Therefore, effect TiO2 Al2O3 contents (CaO–SiO2–Al2O3–MgO–CaF2–TiO2) on final was investigated by slag-metal experiment a 1-kg MoSi2 resistance furnace. The thermodynamic model established based ion molecular coexistence theory kinetic two-film theory. experimental results show that an increase (Al2O3) content leads to (decrease) decrease (increase) alloy. demonstrates activities SiO2, Al2O3, are negatively correlated with CaO positively slag. indicates reaches equilibrium within 10 min, has good applicability for refining.