We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of Aluminum Dissolved in Hematite on Formation of Calcium Ferrites at 1473 K.
- Authors
Guo, Hui; Guo, Xing-Min
- Abstract
Silico-ferrite of calcium and aluminum (SFCA) is a primary bonding phase, which determines the quality of high basicity sinter used widely as raw materials in blast furnace ironmaking. Calcium ferrite containing aluminum (CFA) is a key precursor during the formation process of SFCA and is influenced by Al2O3 content in iron ore fines. In this work, the experiment was conducted to investigate the effect of the aluminum occurrence state on the formation of calcium ferrite by the simulating sintering process of different types of aluminum-bearing hematite at 1473 K. X-ray diffraction, optical microscope, scanning electron microscopy, and energy-dispersive spectroscopy were used to characterize the mineral change in sintered samples. The result shows that the formation of CFA was promoted by both granular Al2O3 wrapped in Fe2O3 and aluminum dissolved in Fe2O3 solid solution, especially for the latter, due to the formation of the CFA directly from the reaction between Fe2O3-Al2O3 solid solution and CaO, and the aluminum content in CFA formed was influenced obviously by the solid solution amount of alumina into Fe2O3 as raw materials.
- Subjects
ALUMINUM; HEMATITE; CALCIUM; FERRITES; BLAST furnaces; IRON ores
- Publication
Metallurgical & Materials Transactions. Part B, 2018, Vol 49, Issue 4, p1974
- ISSN
1073-5615
- Publication type
Article
- DOI
10.1007/s11663-018-1292-x