Recent research published in ‘Teshugang’ has shed light on the intricate relationship between the particle size of direct reduced iron (DRI) and the efficiency of electric arc furnace (EAF) smelting, particularly for 40Cr steel. This investigation, led by a team from the HBIS Material Technology Research Institute and HBIS Group Zhangxuan Technology, highlights how the size of DRI can significantly influence not just production processes, but also the economic viability of steel manufacturing.
In their experiments, the researchers added 30 tons of DRI with varying particle sizes to a Consteel EAF. The findings were striking: smaller DRI particles resulted in increased slag overflow, heightened FeO content in the overflow slag, and ultimately, greater steel and electricity consumption. “When small-sized DRI falls from the top of the EAF, the impact force is relatively small and cannot pass through the slag layer effectively,” explained Kang Xu, one of the lead authors. This phenomenon leads to a retention of small DRI particles and molten steel droplets within the slag, which can form problematic compounds such as iron thallium at the bottom of the slag tank.
The implications of this research extend beyond technical adjustments; they touch on critical commercial aspects of the steel industry. The study suggests that keeping the DRI particle size above 6.3 mm can improve smelting efficiency and reduce costs. “The smelting effect is better when we limit the DRI size,” noted Xu. This insight could prompt steel manufacturers to invest in screening technologies to optimize their raw materials, ultimately leading to cost savings and enhanced production rates.
As the construction sector increasingly demands high-quality steel, understanding these nuances becomes vital. The ability to produce steel more efficiently not only meets market needs but also aligns with sustainability goals by reducing electricity consumption and waste. This research could catalyze a shift in how steel producers approach material selection, fostering innovations that resonate throughout the construction supply chain.
For further insights into this groundbreaking study, you can explore more from the research team at the HBIS Material Technology Research Institute and HBIS Group Zhangxuan Technology by visiting lead_author_affiliation. The findings offer a glimpse into the future of steel production, highlighting the importance of material characteristics in shaping both operational efficiency and economic outcomes in the industry.
