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Siemens VAI to Modernize Hot Mill for ThyssenKrupp Steel Europe
06/21/2011 - Siemens VAI Metals Technologies has received an order from ThyssenKrupp Steel Europe AG to completely modernize its hot strip rolling mill no. 1 in Duisburg-Bruckhausen, Germany. Modernization of the hot mill is scheduled for completion in August 2012.
Siemens VAI Metals Technologies has received an order from ThyssenKrupp Steel Europe AG to completely modernize its hot strip rolling mill no. 1 in Duisburg-Bruckhausen, Germany. Modernization of the hot mill is scheduled for completion in August 2012.
The value of this order is in the mid-double-digit million euro range.
Siemens VAI had previously received an order at the beginning of the year from ThyssenKrupp Steel Europe to modernize its medium-strip mill at Hoesch Hohenlimburg in Hagen, Germany.
The Bruckhausen location of ThyssenKrupp Steel Europe produces more than 3 million tonnes of cast steel slabs per annum. The plant can produce not only high-quality steels but also high-silicon electrical strip grades. It has a compact hot strip mill and a wide hot strip mill. Roughing down takes place in hot-strip mill no. 1 with the aid of a two-high reversing stand and a four-high intermediate stand.
Siemens VAI will install a heavy edger on the reversing stand, as well as the hydraulic and lubricating systems. The edger will enable a wider range of slab widths to be rolled and also improve the width tolerances of the roughing down. The roll separating force of the intermediate stand will be increased, and it will be equipped with long-stroke cylinders for hydraulic automatic gauge control (HAGC).
The finishing mill has seven, four-high rolling stands. During modernization, Siemens will supply the strippers—each consisting of a looper and side guides—for all the stands. The entry guides on stand F0 will have driven rolls. Descaling and cooling stations will be installed downstream of stands F0 to F2, and stands F1 to F3 will be equipped with roll-gap lubrication and anti-peeling systems to safeguard the roll surfaces. The new equipment is expected to reduce both the roll separating force required and the wear on the rolls. A system for selective lubrication of the work rolls near the edges of the strip will be installed on stands F4 to F6 to reduce contour defects still further.
All the stands in the finishing mill will be equipped with SmartCrown technology to improve the profile and flatness control. Stands F0 to F3 will also be fitted with devices to shift the work rolls and L-bending blocks. These will have integrated position sensors to facilitate control of the actual strip gauge in the stand control system, minimizing gauge deviations, especially at the head end of the strip. Long-stroke cylinders will also be installed on all stands for the HAGC.
The scope of supply also includes all the technology packages required to run the plant. Siemens will supply the equipment for changing the work and backup rolls on stands F0 to F3, and upgrade the bearings of the backup rolls.
The Siemens Industry Sector (Erlangen, Germany) is a leading international supplier of environmentally friendly production, transportation, building and lighting technologies. The Sector comprises six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 204,000 employees worldwide (September 30), Siemens Industry achieved total sales of approximately €34.9 billion in fiscal year 2010.
The Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities comprising the business activities of Siemens VAI Metals Technologies, Water Technologies and Industrial Technologies. Activities include engineering and installation, operation and service for the entire life cycle. With around 29,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of €6.0 billion in fiscal year 2010.
