Sustainability has become a critical concern in the global steel industry. As steel production is inherently re-source-intensive and generates significant emissions, the implementation of sustainable practices is crucial to mitigate its ecological footprint. This article explores the current state and future prospects of sustainable galva-nizing technology, a vital process for enhancing steel’s durability by applying a protective zinc coating. Finally, the article presents case studies of fossil-free galvanizing implementations with zero emissions in the U.S. and abroad, illustrating how these initiatives not only comply with stringent emission permits but also contribute to a competitive advantage in the market.

While the effectiveness of hydrogen fuel usage for carbon emission reductions is well-known, the potential sec-ondary effects of hydrogen usage in steel production are still a large focus of research. This article presents a computational fluid dynamics study comparing the thermal stresses in slabs reheated in methane-fired, hydro-gen-fired and blended-fuel reheating furnaces. The simulations investigate the effects of different fuel types on the thermal behavior of the slabs and the resulting thermal stresses. The results provide insights on temperature dis-tributions and thermal gradients in the slabs, as well as the associated stresses, for both methane- and hydro-gen-fired operations.

The path for reducing steel’s CO2 impact is defined. The production of steel using electric arc furnaces is increas-ing with scrap and substituting virgin materials like direct reduced iron/hot briquetted iron. The change of input material quality poses new challenges for steel refining at secondary metallurgy stations like the ladle refining furnace, vacuum tank degasser and RH recirculation degasser. Sulfur, nitrogen and tramp elements reduction and control is becoming more difficult considering the low availability of pure materials, and scrap quality is also not able to match the requirements. Revised processing routes, additional equipment installation and meltshop layout redefinition are discussed in this article.

Increasing iron content in ore sources through additional concentration at the mine significantly reduces overall CO2 emissions. Replacing sinter plants with pellet plants or modifying them to produce iron-rich pellets lowers emissions in integrated mills. Enhancing iron units per blast furnace charge and using small scrap reduces fuel rates and boosts productivity. This integration lowers CO2 emissions by over 0.9% for each additional 1% Fe from ore sources. An innovative process for preparing a mineral mix for pelletizing at mines or ports supports this strategy, further reducing emissions. Simple integrated mass balances for iron, carbon and oxygen were con-ducted to quantify.