At around 28 %, the production of crude steel via the blast furnace route accounts for a large proportion of industrial CO2 emissions in Germany. This is why steel producers are working intensively on converting steel production to the direct reduction process. As one of the pioneers in this field, Salzgitter AG has already been working for six years in a consortium with the Fraunhofer Institutes IKTS, ISI and UMSICHT on how low-CO2 crude steel production can be realized using green hydrogen. In the two successive research projects “MACOR” and “BeWiSe”, funded by the German Federal Ministry of Education and Research (BMBF), it has already been demonstrated that this approach can reduce CO2 emissions by at least 95 %. Supplemented by further measures, CO2-free steel production is thus possible. The technical conditions for a changeover and questions of acceptance were also investigated. As part of its SALCOS project, Salzgitter AG plans to convert conventional steel production via blast furnaces to the direct reduction process using hydrogen by 2033. Construction work for the gradual conversion has already begun and one third of the steel production capacity will already have been transformed to the low-CO2 process by 2026.
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