From Blast Furnaces to Electric Arc Furnaces: The Shift towards Cleaner Steel Production

James Gibbs^*
*Correspondence: James Gibbs, Department of Material Science, Technical University of Gabrovo, Gabrovo, Bulgaria, Email:

Introduction

Steel production has long been dominated by blast furnaces which rely on coke, iron ore and limestone to produce molten iron. While this traditional method has been integral to industrial development, it is also a major contributor to carbon emissions. With growing concerns about climate change and the need for sustainable manufacturing, the steel industry is undergoing a transformation. One of the most significant changes is the shift from blast furnaces to Electric Arc Furnaces (EAFs), which offer a more environmentally friendly alternative [1]. Blast furnaces are highly energy-intensive and produce substantial carbon dioxide emissions. The process involves burning coke, a carbon-rich fuel derived from coal, which releases large amounts of greenhouse gases. Additionally, the mining and transportation of raw materials further contribute to the environmental footprint of blast furnace operations. The steel shortage has also resulted in supply chain disruptions across multiple industries, forcing businesses to seek alternative materials or reduce their output. Additionally, the shortage has led to intensified competition among manufacturers, causing market volatility and uncertainty.

Electric arc furnaces represent a cleaner, more efficient way to produce steel. Unlike blast furnaces, EAFs primarily use recycled scrap metal as their raw material, significantly reducing the need for virgin iron ore and coke. This recycling-based approach cuts down on CO emissions by up to 75% compared to traditional steelmaking. Furthermore, EAFs can be powered by renewable energy sources, further reducing their carbon footprint [2]. EAFs are not only more sustainable but also more flexible and cost-effective. They require lower capital investment and can be operated on a smaller scale, making them ideal for decentralized production. Additionally, advancements in EAF technology, such as improved electrode efficiency and digital automation, have enhanced productivity and energy efficiency.

Description

Despite their advantages, EAFs face challenges, including the availability and quality of scrap metal. High-grade steel production still relies on a mix of scrap and direct reduced iron (DRI), which requires new processing technologies to become fully sustainable. Governments and industries are investing in research and policies to support this transition, including carbon pricing, subsidies for green steel initiatives and innovations like hydrogen-based steelmaking [3]. An emerging technology in cleaner steel production is hydrogen-based steelmaking. Hydrogen can replace coke as a reducing agent in DRI production, producing only water vapor instead of CO. This breakthrough has the potential to revolutionize the steel industry by eliminating emissions associated with iron ore reduction. Several pilot projects are underway to scale up hydrogen-based steelmaking, with significant investments from major steel manufacturers and governments [4].

The transition to cleaner steel production is also supported by the circular economy concept. By increasing the efficiency of steel recycling, industries can further minimize waste and energy consumption. Advanced sorting and processing techniques ensure that scrap steel maintains high quality, reducing the reliance on primary raw materials and making the steel lifecycle more sustainable [5]. Another major factor is the surge in demand for steel, particularly in industries such as construction, automotive manufacturing and infrastructure development. As economies rebounded from the pandemic, the demand for steel soared, outpacing supply capabilities. Moreover, government policies and trade restrictions, such as tariffs and export limitations, have contributed to supply constraints, making it difficult for certain countries to access steel imports. The shortage has also been aggravated by raw material scarcity, particularly in iron ore and scrap metal, which are essential components in steel production.

Conclusion

The shift from blast furnaces to electric arc furnaces is a crucial step toward cleaner steel production. As the world moves toward decarbonization, EAFs provide a viable pathway for reducing emissions while maintaining steelâ??s role as a fundamental material for infrastructure and industry. With continued investment, technological advancements and innovations like hydrogen-based steelmaking, the future of steelmaking is set to become greener, more efficient and more sustainable. The commitment to sustainable steel production will play a pivotal role in achieving global climate goals and fostering a cleaner, more resilient industrial landscape. The shortage of steel has had widespread economic and industrial repercussions. One of the most immediate effects has been the sharp increase in steel prices, making construction projects more expensive and delaying developments worldwide. Companies in industries reliant on steel, such as automotive and appliance manufacturing, have had to slow down or halt production due to a lack of materials, leading to revenue losses and job cuts.

Acknowledgement

None.

Conflict of Interest

None.

References

1. Kushwah, Sagarsingh, Shreyashkumar Parekh and Mehul Mangrola. “Optimization of coil spring by finite element analysis method of automobile suspension system using different materials.” Mater Today Proc42 (2021): 827-831.

Google Scholar    Cross Ref

2. Zhang, Sheng, Yuqi Zhang, Jinshun Qi and Zhiyi Zou, et al. “Effect of heat treatment on the microstructure and mechanical properties of additive manufactured Ti-6.5 Al-2Zr-1Mo-1V alloy.” Mater16 (2022): 160.

Google Scholar    Cross Ref    Indexed at

3. Cortina, Magdalena, Jon Inaki Arrizubieta, Jose Exequiel Ruiz and Eneko Ukar, et al. “Latest developments in industrial hybrid machine tools that combine additive and subtractive operations.” Mater11 (2018): 2583.

Google Scholar    Cross Ref      Indexed at

4. Sommer, David, Babette Götzendorfer, Cemal Esen and Ralf Hellmann. “Design rules for hybrid additive manufacturing combining selective laser melting and micromilling.” Mater14 (2021): 5753.

Google Scholar    Cross Ref      Indexed at

5. Górka, Jacek. “Assessment of the weldability of T-welded joints in 10 mm thick TMCP steel using laser beam.” Mater 11 (2018): 1192.

Google Scholar    Cross Ref      Indexed at