Siemens sells automation systems to two Chinese rolling mills
Siemens is supplying the basic and process automation for both of these plants, from the furnace exit side for the roughing and finishing mills, to the laminar-flow-cooling sections and up to the coilers, including the coil conveyors. Integrated HMI systems with easy-to-use process and plant diagnostic functions will facilitate operation of the plants. Central components of the automation solutions from Siemens are the process models for automatic presetting of the roughing and finishing mills, the models and control systems for determining and adhering to the strip width, the integrated profile and flatness model of the finishing mill as well as the Microstructure Target Cooling strip-cooling model. All the used components, systems, controllers and models are parts of the integrated Siroll HM concept for hot-rolling mills. The high degree of automation enables fully automatic operation of the plants with fewer personnel. The automation equipment is characterized by a high degree of standardization. This ensures rapid production start-up and high plant availability while reducing maintenance to a minimum.
One steel producer, the Xin Yu Iron and Steel Group in Jiangxi province, operates a production complex including wire rod mills, a beam-rolling mill and plate-rolling mills. The new hot-rolling mill was designed to produce high-quality hot-rolled strip with widths of 750 to 1430 millimeters and thicknesses of 1.2 to 16 mm. A total of three million metric tons of hot strip will be produced per year. The range of products will include carbon steel, HSLA steel, silicon steels and modern multiphase steels.
The other steel producer, located on the Chinese East coast, is now building a hot-strip mill which, in the first phase of expansion, is to supply 2.5 million metric tons of wide hot-strip per year and, in the final stage, five million metric tons per year. The plant has been designed for hot strip with widths of between 1200 and 2000 millimeters and thicknesses of 1.5 to 25.4 millimeters. The maximum weight of each coil is 43 metric tons with coil diameters of 1000 to 2500 millimeters. The product spectrum ranges from simple carbon steel and low-alloy steels to high-quality carbon steels. It also includes application steels for bridges, pipes, pressure vessels, automotive manufacturing, shipbuilding and welding steel grades.
For this hot-rolling mill, Siemens is also supplying the Sinamics SM 150-fed main drives. This part of the contract will be handled by Siemens Ltd. China. Siemens is also responsible for supervising installation of the supplied systems as well as for commissioning. The mechanical equipment of the hot-rolling mills will be provided by Chinese companies.
Metals Technologies (MT), a division of the Siemens Industrial Solutions and Services (I&S) Group, is one of the world's leading engineering and plant-building companies for the iron and steel industry as well as for the flat-rolling sector of the aluminum industry and for open-cast mining. MT, which was created from the integration of Voest-Alpine Industrieanlagenbau, Linz/Austria, plus the electrical engineering product business and automation solutions of Siemens, provides a comprehensive range of supplies and services for all related technological processes and integrated automation solutions for the entire life-cycle of metallurgical plants.
The Siemens Industrial Solutions and Services Group (I&S) is the integrator of systems and solutions for industrial and infrastructure facilities and global service provider for the plant and projects business covering planning, installation, operation and the entire life cycle. I&S uses its own products and systems and process technologies in order to enhance productivity and improve competitiveness of companies in the sectors of metallurgy, water treatment, pulp and paper, oil and gas, marine engineering, open-cast mining, airport logistics, postal automation, intelligent traffic systems and industrial services. In fiscal 2006 (to September 30) I&S employed a total of 36,200 people worldwide and achieved total sales of EUR 8.819 billion, according to U.S. GAAP.
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