Reaction Routes of CaO-Fe2O3-TiO2 and Calcium Ferrite-TiO2 System in Continuous Heating Process
- Organization:
- The Minerals, Metals and Materials Society
- Pages:
- 7
- File Size:
- 229 KB
- Publication Date:
- Mar 1, 2018
Abstract
Perovskite easily forms during sintering of vanadium titanium magnetite (VTM) and is unfavorable for the following blast furnace. Steelmaking can concomitantly produce a great quantity of oxidized scale composed mainly of FeO and Fe3O4. Calcium ferrite (CaOFe2O3, CF) can be formed by oxidized scale with lime in air atmosphere and then added to the VTM during sintering. X-ray diffraction (XRD) results indicated that perovskite is not generated at low temperature but only when the temperature increases to 1473 K in the CF–TiO2 system. Therefore, VTM sintering can be performed with a low-temperature process with doping of CF. Perovskite formation is mainly divided into two steps. First, CF melts and produces CaO. TiO2 and CaO then combine to produce perovskite. This paper also discussed the reaction mechanism of CaO–Fe2O3–TiO2 ternary system to compare the generation routes of perovskite.
Citation
APA: (2018) Reaction Routes of CaO-Fe2O3-TiO2 and Calcium Ferrite-TiO2 System in Continuous Heating Process
MLA: Reaction Routes of CaO-Fe2O3-TiO2 and Calcium Ferrite-TiO2 System in Continuous Heating Process. The Minerals, Metals and Materials Society, 2018.