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Phase composition and liquidus temperatures of the CaO–SiO2–MgO-13 wt%Al2O3–TiO2 system in reduction conditions.

Authors :
Wang, Shuai
Chen, Mao
Zhao, Baojun
Guo, Yufeng
Jing, Jianfa
Chen, Feng
Yang, Lingzhi
Source :
CALPHAD. Dec2023, Vol. 83, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

Effects of TiO 2 , binary basicity and MgO content on the liquidus temperatures of TiO 2 –CaO–SiO 2 –MgO–Al 2 O 3 slags were experimentally studied in equilibrium with carbon. The experimental techniques include high temperature equilibration, quenching and Electron Probe X-ray Microanalysis (EPMA). It was found that the major primary phase in the composition range investigated is M 3 O 5 (M = Ti, Mg, Al). The liquidus temperatures increase with increasing TiO 2 and MgO contents, whereas decrease with increasing CaO/SiO 2 mass ratio. The experimentally determined liquidus temperatures are much higher than the predicted ones by FactSage and the primary phases between the experiment results and predictions are also different. The mole fractions of Al 2 TiO 5 and Ti 3 O 5 in the M 3 O 5 phase decrease, but MgTi 2 O 5 increases with increasing MgO content and CaO/SiO 2 in the samples. Moreover, the proportions of Al 2 TiO 5 and MgTi 2 O 5 in the M 3 O 5 phase decrease, while Ti 3 O 5 proportion in the M 3 O 5 phase increases with increasing the reaction time. The mole ratio of Ti3+/Ti4+ in the M 3 O 5 phase decreases with MgO content and CaO/SiO 2 mass ratio in the samples but increases with increasing reaction time. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03645916
Volume :
83
Database :
Academic Search Index
Journal :
CALPHAD
Publication Type :
Academic Journal
Accession number :
173975345
Full Text :
https://doi.org/10.1016/j.calphad.2023.102639