German steelmaker Thyssenkrupp is celebrating 50 years of operations of blast furnaces Schwelgern 1 in Duisburg Plant in Germany shaping the skyline of Duisburg-Marxloh. Schwelgern 1 blast furnace in Duisburg was inaugurated by the then August-Thyssen Hütte on 6 February 1973. With a hearth diameter of 14 meters and a capacity of 4,200 cubic meters, blast furnace 1 set new standards in 1972 in terms of size and performance. After its relining in 2021, the black giant is back at the cutting edge and will be on its sixth furnace campaign. More than 70,000 cubic meters of concrete and 38,000 tonnes of steel were used in building the blast furnace Despite the imminent move away from blast furnace technology, Schwelgern 1 was once again brought back to the state of the art in 2021 for the transitional period. After a three-month shutdown and the investment of a sum running into the mid-double-digit millions, thyssenkrupp Steel launched the steel colossus onto its sixth and thus probably final furnace campaign in October 2021 As part of the transformation to carbon-neutral steelmaking, the coal-fired blast furnaces will be replaced by direct reduction plants operating with hydrogen. Thyssenkrupp Steel plans to place the order for a first plant shortly. Then the "black giant" will also take its well-deserved "retirement" after its last campaign.