<p>This study investigates the non-static hydrogen reduction characteristics of various iron ore fines under HyREX reduction conditions to assess the raw material flexibility of a hydrogen-based fluidized bed reduction process. The research focuses on comparing the reduction and disintegration behaviors between hematite ore and goethite-containing ores. Results indicate that hematite ore exhibits greater disintegration during non-static hydrogen reduction, which can be attributed to its mineralogical characteristics and higher total iron content. By kinetic analysis of the reduction curve, it was found that the overall hydrogen reduction can be divided into three separate stages. In the second stage, where most of the reduction occurs, the hydrogen reduction rate is primarily governed by interfacial chemical reactions, with minimal impact from diffusion enhancements due to goethite decomposition. In all the ores tested, the reduction rate decreased sharply in the final stage because the overall reaction was primarily governed by slow solid-state diffusion. Additionally, the final reduction degree strongly depends on the ultrafine particles generated by disintegration during reduction. The final reduction degree of all iron ores used in this study exceeds 90 pct, highlighting the high raw material flexibility of the HyREX process. This flexibility supports the potential for ore blending strategies to balance performance and cost-effectiveness, offering valuable insights for optimizing industrial hydrogen reduction processes.</p>