Affiliation:
1. University of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, Beijing, China + University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Department of Physical Chemistry, Beijing, China
Abstract
In order to optimize the current reduction process of chromite, a good
knowledge of reduction mechanism involved is required. The basic component in
chromite ore is FeCr2O4, thus, kinetic investigation of synthetic FeCr2O4
with different amount of carbon were carried out in the temperature range of
1473K to 1673K under both isothermal and non-isothermal mode. The iron can be
easily reduced compared with chromium. And higher reduction degree of
chromite can be achieved by increasing temperature and carbon content. With
the supporting of X-ray Diffraction and Scanning Electron Microscope methods,
the formation of metallic products followed the sequence: Fe-C alloy,
(Fe,Cr)7C3and Fe-Cr-C alloy. Kinetics analysis showed that the first stage
was controlled by nucleation with an apparent activation energy of 120kJ/mol,
while the chromium reduction was controlled by crystallochemical
transformation with an apparent activation energy of 288kJ/mol.
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Mechanics of Materials,Geotechnical Engineering and Engineering Geology
Cited by
21 articles.
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