Replacing carbon with hydrogen is an effective method for low-carbon ironmaking in blast furnaces. The basis for implementation is to understand the mechanism, principle and efficiency of hydrogen reduction of iron ore at high temperatures. Therefore, we designed and built an on-site hydrogen high-temperature reactor that can pass in hydrogen, heat it to 1600 degrees, and perform synchrotron radiation X-ray analysis at the same time. The research results can effectively help personnel understand the mineral phase evolution and slag phase changes of hydrogen reduction iron ore, obtain the basis for initial raw material deployment and blast furnace operating parameter adjustment, and successfully reduce carbon emissions.

Unlike traditional experiments analyzing cooled samples to infer high-temperature material behavior, our synchrotron radiation X-ray analysis in hydrogen and high-temperature environments is a world-first. Preliminary results show elements dissolve into and diffuse out of iron ore during high-temperature reduction, determining its activity. Forming suitable solid solution oxides at high temperatures is a critical operational parameter.

Steel plants face pressure to reduce carbon emissions by changing blast furnace ironmaking, using hydrogen instead of some coke for ore reduction. Yet, hydrogen＇s mechanism, efficiency, and furnace introduction parameters remain unknown. Our technology offers real-time insight into high-temperature reduction reactions, guiding raw material blending and process adjustments. This aids in reducing carbon emissions while maintaining blast furnace efficiency.