Abstract
Dense Wustite micropellets having different sizes (W.1-W.4) were isothermally reduced at 900-1100°C with H2, CO and H2-CO mixtures. The reduction was conducted with a microforce balance and the weight changes during reduction was recorded. Surface area measurements light and scanning electron microscopy and X-ray and carbon analyses were used to elucidate the kinetics and mechanisms of reduction.The influence of micropellets size, reducing gas composition at different temperatures were extensively studied. At 900-950°C a reaction rate minimum was only detected in H2 and H2-rich gas mixtures which was attributed to α-γ-transformation of the formed metallic iron.
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