Recent research led by Zheng An-yang from the School of Metallurgical and Ecological Engineering at the University of Science and Technology Beijing delves into the intricate role of magnesium oxide (MgO) in the production of Ti-containing sinter, a crucial component in the iron and steel industry. The findings, published in the journal ‘Engineering Science’, reveal significant implications for the operational efficiency of blast furnaces, which are vital for steel production.
As the demand for high-quality steel continues to rise globally, understanding the chemical composition of slag becomes increasingly important. The study highlights how the ratio of MgO to Al2O3 in slag can dramatically influence both fluidity and desulfurization capabilities—two factors essential for stable blast furnace operations. Zheng notes, “Our research indicates that while MgO can enhance certain properties of sinter, excessive concentrations can lead to undesirable effects on the mineral structure.”
Through meticulous experimentation using scanning electronic microscopy and drop testing, the team discovered that increasing MgO content from 2.04% to 3.96% resulted in a notable decrease in hematite and complex calcium ferrite, while the mass of liquid phase, magnetite, and silicate increased. This shift could have profound implications for the energy sector, particularly as industries seek to optimize processes for better yield and lower emissions.
The research also underscores the challenge of meeting smelting requirements in blast furnaces, especially in regions like China where sinter constitutes over 70% of the ferrous burden. Zheng explains, “Our findings suggest that while MgO can improve certain softening properties of sinter, it may also hinder the development of a crucial liquid phase, which is necessary for maintaining the structural integrity of the sinter during processing.”
One of the more striking results is the increase in softening temperature, which was observed to exceed 1120℃. This could lead to enhanced thermal stability in the sinter, potentially allowing for more efficient furnace operations and reduced energy consumption. As industries grapple with rising production costs and environmental regulations, these insights could guide the formulation of more effective sintering processes.
In essence, this research not only sheds light on the complex interactions within sinter but also opens avenues for further exploration into optimizing blast furnace operations, potentially reshaping the landscape of steel production. The findings from Zheng An-yang and his team could serve as a catalyst for innovation, helping the energy sector to navigate the challenges of sustainability while meeting the ever-growing demands for quality steel.
For more information on this research, you can visit the University of Science and Technology Beijing’s website at lead_author_affiliation.
