Thermodynamics of Titanium Distribution Between Ferritic Stainless Steel and CaO–Al2O3–MgO–TiO2 Slag at 1823 K

초록

Titanium distribution ratio (LTi) between Ti-bearing ferritic stainless steel (Ti-FSS) and CaO–Al2O3-based VOD slag was measured at 1823 K (1550 °C). Titanium oxide in the CaO–Al2O3–MgO–TiO2 slag exists as ‘TiO32-’ complex and that the titanate capacity increases with slag basicity. However, LTi decreases with basicity due to a significant decrease in oxygen potential at slag-metal interface although titanate capacity of the slag increases. Hence, the highly basic slag is favorable to improve Ti yield.

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