EOW May 2007

english corporate news

Second hot-strip rolling mill for China Metals Technologies (MT), a division of the Siemens Group Industrial Solutions and Services (I&S), received another order from Tangshan Guofeng Co Ltd, China, to equip its second hot-strip rolling mill at the Tangshan location with automation technology. This includes all basic and process automation as well as the visualisation system. A new strip-cooling model, which is also part of the scope of supply, enables the efficient production of high-quality steels. Commissioning of the automation equipment of the new rolling mill is scheduled for January 2008 and the first coil is to be produced at the end of March 2008. Tangshan Guofeng Co Ltd, located in Hebei province around 200km to the east of Beijing, operates a production complex the capacity of which is to be doubled from a current 4.4 million metric tons of crude steel to 8.8 million metric tons in the next few years. A new rolling mill will be installed with a rolling capacity of up to three million metric tons of hot strip per year and will be capable of rolling strip with thicknesses up to 1,430mm. Siemens is supplying the basic and process automation for the reversing roughing stand equipped with a hydraulic edger, a coil box, the seven- stand finishing train with work-roll shifting and bending equipment, the laminar-cooling section and the two coilers, including coil conveyor. The technological control systems and the process models for the individual mill sections are also included in the scope of supply. Integrated HMI (human machine interface) systems with easy-to-use process and plant diagnostic functions will facilitate plant operation. A central feature of the automation solution is the new strip-cooling model of Siemens, which is based on a physical description of the thermodynamic processes during cooling.

The current data is sent to a model- predictive cooling-line control system. As a result, precise monitoring of the entire strip cooling procedure over time is possible. This not only ensures constant quality for the whole strip, the required metallurgical properties of the steel can also be reliably achieved within tight tolerances. This enables the efficient production of high- quality steel grades. All of the components and systems to be used are part of the integrated Siroll HM solution for hot-rolling mills.

The automation system is characterised by its high degree of standardisation. This ensures rapid production start-up and high plant availability. Siemens is also responsible for the installation of the supplied systems. The mechanical equipment and the drives – mainly Siemens components – for the hot-rolling mill will be provided by domestic Chinese companies. Siemens – Austria Fax : +43 732 6980 3131 Website : www.siemens.com/metals

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characteristic phase components along the entire strip is carried out in real time. curves and

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EuroWire – May 2007