Structural-chemical transformations of alpha-Fe2O3 in the course of transport reduction

Mossbauer spectroscopy was used to detect amorphous phases (particle size < 8 nm) between the crystal phases formed at different stages of structural- chemical transformations of alpha -Fe2O3 in the course of transport reducti on. The sequence of phase transformations in the reduction of alpha -Fe2O3 to metallic iron at temperatures above and below the wustite stability poin t (similar to 570 degreesC) was established. The reduction in the wustite s tability region gives rise to two phases: Fe1-xO and FeO, the stoichiometri c phase formed first. At 570-600 degreesC, the reduction of magnetite to wu stite occurs by the zone mechanism, and the sample simultaneously comprises three phases: Fe3O4, FeO, and Fe.