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In situ X‐ray diffraction analysis of iron ore sinter phases
Author(s) -
Scarlett Nicola V. Y.,
Madsen Ian C.,
Pownceby Mark I.,
Christensen Axel N.
Publication year - 2004
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s002188980400353x
Subject(s) - iron ore , metallurgy , blast furnace , materials science , aluminium , phase (matter) , agglomerate , hematite , mineralogy , chemistry , composite material , organic chemistry
Owing to the depletion of world lump iron ore stocks, pre‐treated agglomerates of fine ores are making up a growing proportion of blast‐furnace feedstock (∼80%). These agglomerations, or `sinters', are generally composed of iron oxides, ferrites (most of which are silicoferrites of calcium and aluminium, SFCAs), glasses and dicalcium silicates (C2S). SFCA is the most important bonding phase in iron ore sinter, and its composition, structural type and texture greatly affect its physical properties. Despite its prevalence and importance, the mechanism of SFCA formation is not fully understood. In situ powder X‐ray diffraction investigations have been conducted into the formation of SFCA, allowing the study of the mechanism of its formation and the observation of intermediate phases with respect to time and temperature. Studies have been carried out to investigate the effects of changing the substitution levels of aluminium for iron. The use of the Rietveld method for phase quantification gives an indication of the order and comparative rates of phase formation throughout the experiments.