Brazilian company CSN is making significant strides in sustainability by implementing green hydrogen technology at its Volta Redonda plant in Rio de Janeiro. The technology, developed by UTIS from Portugal, is being used in the blast furnace number two, marking the first application of this innovation in a steel plant worldwide. Known as the UC3 system, it focuses on optimizing the combustion process in the regenerators to reduce fossil fuel consumption and increase efficiency. Fabiam Franklin, CSN's director, emphasized the crucial role of regenerators in energy recovery, leading to improved thermal efficiency and reduced CO2 emissions. The implementation has already shown promising results, with a seven percent increase in blowing temperature, enabling reduced coke usage per ton of pig iron, enhanced productivity, and lower environmental impact. This initiative not only showcases CSN's commitment to sustainability but also positions them as a pioneer in utilizing renewable energy within the steel industry.