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ThyssenKrupp Steel Europe invests in environmental protection  

By Gerald Ondrey |

ThyssenKrupp Steel Europe AG (Duisburg, Germany; www.thyssenkrupp-steel-europe.com) has modernized the continuous annealing line at its Dortmund site. Thanks to investment of around €30 million, nitrogen oxide emissions from the line will be reduced by half, further improving the environmental situation around the site. When steel is rolled into thin strip at high pressure it hardens and without further treatment cannot be formed into car parts, computer cases, construction elements and the like. In the continuous annealing line the steel is heated to up to 835°C to reverse the hardening effect. The steel strip passes through the roughly 300-m long line at a speed of up to 300 m/min. The Dortmund continuous annealing line processes steel from the coupled pickling-tandem cold rolling mill at the site and supplies it to the two electrolytic galvanizing lines on the site of the former Westfalenhütte mill. Built between 1984 and 1986 the line has a capacity of 60,000 ton/mo. Among other grades, it processes so-called bake-hardening and advanced high-strength steels for the auto industry. They reduce the weight of car parts and so cut fuel consumption and carbon dioxide emissions. The steel is annealed in eight heating zones,…
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