Abstract
The liquidus temperatures and phase relations of Ti-bearing slag systems play an important fundamental guiding role for the comprehensive utilization of Ti resources, while the lack of thermodynamic information severely restricts the development of above mentioned systems. In the present work, the phase equilibrium relationships were investigated for the CaO-SiO2-5wt%MgO-10wt%Al2O3-TiO2 phase diagram system. The equilibrium phases were experimentally determined at 1300 °C and 1400 °C using the high temperature equilibrium technique followed by X-Ray Fluoroscopy (XRF), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Energy Dispersive X-ray spectroscope (EDX) analysis. The liquid phase (L), melilite solid solution phase ((2CaO·MgO·2SiO2, 2CaO·Al2O3·SiO2)ss), perovskite phase (CaO·TiO2) and dicalcium silicate phase (2CaO·SiO2) were found. Based on the experimental results, the 1300 °C–1500 °C isotherms and phase relations were obtained for CaO-SiO2-5wt%MgO-10wt%Al2O3-TiO2 system relevant to Ti-bearing slag system.
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