Effect of Aluminum Dissolved in Hematite on Formation of Calcium Ferrites at 1473K

Effect of Aluminum Dissolved in Hematite on Formation of Calcium Ferrites at 1473K Effect of Aluminum Dissolved in Hematite on Formation of Calcium Ferrites at 1473 K HUI GUO and XING-MIN GUO 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 Al O content in iron ore fines. In this work, the experiment was 2 3 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 Al O 2 3 wrapped in Fe O and aluminum dissolved in Fe O solid solution, especially for the latter, due 2 3 2 3 to the formation of the CFA directly from the reaction between Fe O -Al O solid solution and 2 3 2 3 CaO, and the aluminum content in CFA formed http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Metallurgical and Materials Transactions B Springer Journals

Effect of Aluminum Dissolved in Hematite on Formation of Calcium Ferrites at 1473K

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Publisher
Springer US
Copyright
Copyright © 2018 by The Minerals, Metals & Materials Society and ASM International
Subject
Materials Science; Metallic Materials; Characterization and Evaluation of Materials; Structural Materials; Surfaces and Interfaces, Thin Films; Nanotechnology
ISSN
1073-5615
eISSN
1543-1916
D.O.I.
10.1007/s11663-018-1292-x
Publisher site
See Article on Publisher Site

Abstract

Effect of Aluminum Dissolved in Hematite on Formation of Calcium Ferrites at 1473 K HUI GUO and XING-MIN GUO 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 Al O content in iron ore fines. In this work, the experiment was 2 3 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 Al O 2 3 wrapped in Fe O and aluminum dissolved in Fe O solid solution, especially for the latter, due 2 3 2 3 to the formation of the CFA directly from the reaction between Fe O -Al O solid solution and 2 3 2 3 CaO, and the aluminum content in CFA formed

Journal

Metallurgical and Materials Transactions BSpringer Journals

Published: May 29, 2018

References

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