The Siemens´ special manufacturing process “Corex” is making the production of iron much more environmentally friendly. The outstanding feature is that it uses conventional coal instead of coking coal, the customary ingredient. A Corex-Steel mill requires no coking plant, an element that typically accounts for a major share of emissions.

As a result of this traditional process with coking plant, powder metal facility and blast furnace, 1.4 kilograms of sulfur dioxide are created for each ton of pig iron. According to measurements taken by the TÜV Rheinland, with the Corex process this figure is reduced to only 40 grams and discharge of dust and nitrogen oxides is cut by more than 90 percent. The gases produced can immediately be used for heating or for generating electricity in a gas and steam turbine power plant.