Magnetizing roasting of leucoxene concentrate

The phase transformations occurring during magnetizing roasting of leucoxene concentrate in the temperature range 600–1300°C are studied. It is demonstrated, that in the temperature range 600–800°C, only iron oxides are reduced to a metallic state; at temperatures above 800°C, combined reduction of...

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Bibliographic Details
Published in:Russian metallurgy Metally 2011-07, Vol.2011 (7), p.656-659
Main Authors: Anisonyan, K. G., Sadyhov, G. B., Olyunina, T. V., Goncharenko, T. V., Leon, L. I.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Degradation
Iron
Iron oxides
Magnetic properties
Materials Science
Metallic Materials
Phase transformations
Reduction
Roasting
Titanium oxides
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Summary:The phase transformations occurring during magnetizing roasting of leucoxene concentrate in the temperature range 600–1300°C are studied. It is demonstrated, that in the temperature range 600–800°C, only iron oxides are reduced to a metallic state; at temperatures above 800°C, combined reduction of iron and titanium oxides takes place. At 1050°C, reduced specimens are represented by the Ti 5 O 9 and Ti 6 O 13 Magnéli phases. The formation of iron metatitanate (FeTiO 3 ), under reduction conditions and the existence of ferrous iron ions in the Magnéli phases slightly degrade the magnetic properties of the products of magnetizing roasting. In high temperature region (1200–1300°C), a similar effect is exerted by the formation of iron dititanate or anosovite in the system. The possibilities of eliminating the undesired factors decreasing the magnetic properties of the products of magnetizing roasting are determined.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029511070020