Turnkey Supply of a New Hot-Strip Mill for Mittal Steel Poland, Krakow Fully-Integrated Hot-Strip Mill for the Production of High Strength Steels and Advanced Steel Grades

by Dr. Albert Angerbauer, Dr. Lawrence Gould, Berta Haring, Thomas Kraxberger, Franz Reiter

Publisher - Siemens Vai, Voest-Alpine Industrieanlagenbau Gmbh & Co

Category - General Novel

On July 18, 2005 Siemens VAI was awarded a contract from Mittal Steel Poland for the turnkey supply of a new high-capacity hot-strip mill at Krakow, Poland. The mill, which will be capable of rolling 2.4 million t/a of a wide range of carbon, stainless and special steel grades in widths of up to 2,100 mm, will be one of the widest hot-strip mills in Europe. Start-up is scheduled to commence in early 2007. This paper outlines the project background, scope and technological highlights of this project. The production of high strength steels and advanced steel grades call for line concepts that are fully integrated and are capable of precisely performing the technological procedure, which is set by the production optimization system and by the technological models. The fully-integrated Hot Strip Mill is a line concept, which is focused on process performance and process optimization. In the new 2250 mm wide hot strip mill for Mittal Steel Poland, Krakow works, there are new technological features implemented first time. Examples are the L-Block shifting and bending unit with SmartCrown® technology, employing specially shaped work rolls which enhance the profile and flatness-control capability, a laminar-cooling system featuring “QuickSwitch”-cooling headers, allowing for a more precise cooling control – especially important for advanced steel grades, and two VAI “PowerCoilers” with four wrapper rolls for the reliable coiling of high-strength-steel grades.

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