Efecto de la temperatura, basicidad, ciclo térmico y potencial oxidante en la formación de fases minerales en briquetas de mineral de hierro

E. Bedolla; E. A. Aguilar; C. A. León

doi:10.3989/revmetalm.1997.v33.i3.859

Effect of temperature, basicity, fíring cycle and oxygen potential on mineral phases in iron ore briquettes

Authors

E. Bedolla Instituto de Investigaciones Metalúrgicas. Universidad Michoacana de San Nicolás de Hidalgo
E. A. Aguilar Instituto de Investigaciones Metalúrgicas. Universidad Michoacana de San Nicolás de Hidalgo
C. A. León Instituto de Investigaciones Metalúrgicas. Universidad Michoacana de San Nicolás de Hidalgo

DOI:

https://doi.org/10.3989/revmetalm.1997.v33.i3.859

Keywords:

Agglomeration, Mineral phases, Oxygen potential, Iron ore, Sintering

Abstract

In the present work, the effect of the firing conditions such as temperature, basicity, firing cycle and oxygen potential, on the formation of mineral phases in magnetitic iron ore briquettes was studied. It was found that a high oxygen potential (air) favors the oxidation reaction of magnetite to hematite and as a consequence calcium ferrite formation. The calcium ferrite increased with the increase of the basicity and decreased with the increase of the temperature. At a medium partial pressure of oxygen (ρO₂ = 5 x 10^-3 atm.), the agglomerate was composed in the majority of magnetite with small amounts of reoxidized hematite and negligible amounts of calcium ferrite. It could be noticed that magnetite increased and hematite decreased with increase of basicity. The mineral phases present in the briquettes fired at the gas mixture composed by 1 % CO, 24 % CO₂ and 75 % N₂ and then cooled in air, include magnetite and highly oxidized phases such as hematite and calcium ferrite.

Downloads

Download data is not yet available.

Downloads

Published

1997-06-30

How to Cite

Bedolla, E., Aguilar, E. A., & León, C. A. (1997). Effect of temperature, basicity, fíring cycle and oxygen potential on mineral phases in iron ore briquettes. Revista De Metalurgia, 33(3), 161–171. https://doi.org/10.3989/revmetalm.1997.v33.i3.859

Download Citation

Issue

Vol. 33 No. 3 (1997)

Section

Articles

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.

All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.

Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.