Recent research led by WU Sheng-li from the School of Metallurgical and Ecological Engineering at the University of Science and Technology Beijing sheds light on the intricate dynamics of iron ore sintering, a process crucial for the productivity of blast furnaces in China. The findings, published in the journal ‘工程科学学报’ (Journal of Engineering Science), delve into the liquid phase fluidity of iron ore—a pivotal characteristic that influences the quality and yield of sinter, and, by extension, the efficiency of ironmaking.
The study emphasizes that optimizing the ore-blending process based on high-temperature characteristics can significantly enhance sinter yield and quality, ultimately impacting the economic viability of iron production. “A suitable liquid phase fluidity of blended ores produces a sintered body with a stronger bonding strength,” WU notes, highlighting the critical relationship between fluidity and the performance of blast furnaces.
Through innovative simulations and thermodynamic calculations using FactSage software, the researchers investigated how different iron ores behave under fixed conditions of calcium oxide (CaO) ratios. Their findings reveal that the formed melt content of iron ore is the most influential factor affecting liquid phase fluidity. Interestingly, the study found that the rules governing fluidity differ when considering fixed alkalinity compared to fixed CaO ratios, suggesting a complex interplay of chemical properties that must be understood for effective ore blending.
The implications of this research extend beyond academic curiosity; they resonate deeply within the construction sector, particularly in steel production. As the demand for high-quality steel surges, understanding the nuances of sintering processes could lead to more efficient and cost-effective production methods. With construction projects increasingly reliant on steel, improvements in sintering could translate to lower costs and enhanced structural integrity in buildings and infrastructure.
Moreover, the study highlights how the content of gangue minerals affects liquid phase fluidity, with higher silica (SiO2) content resulting in decreased fluidity, while alumina (Al2O3) has a more nuanced effect. This knowledge can guide the selection of raw materials, optimizing blends to achieve desired fluidity and strength in the final product.
As WU Sheng-li and his team continue to explore the thermodynamic behaviors of iron ores, the construction industry stands to benefit from these advancements. The research not only enhances our understanding of sintering but also opens avenues for improving energy efficiency and reducing waste in ironmaking processes.
For more insights into this groundbreaking research, you can visit the University of Science and Technology Beijing’s website at lead_author_affiliation.
