Innovative hybrid concept
voestalpine plans to gradually shift from the coal-based blast furnace route to steel production using green electricity. Here liquid pig iron and sponge iron (HBI) join scrap as the most important pre-materials for tomorrow’s carbon-neutral production of high-quality steel.
The significant innovation in this production technology is the raw materials mix, with its increased proportion of HBI.
Direct reduction as a bridging technology
Direct reduction is an important bridging technology for decarbonizing steel production. It reduces iron ore to iron with natural gas, rather than coal and coke, resulting in fewer CO2 emissions. The direct reduction process is used to produce HBI, a sophisticated and environmentally friendly pre-material used in steel production.
The hybrid technology would allow the CO2 emitted during steel production at Linz and Donawitz to be significantly reduced, by around 30%. This represents an annual saving of 3 to 4 million tons of CO2.
The hybrid concept is the basis for achieving the hydrogen-based transformation by 2050.