The scope of supply includes all the basic and process automation as well as the visualization systems. One plant will also be supplied with Siemens drive systems for the motors of the rolling stands. The new rolling mills are scheduled to start operating as early as the middle and the end of 2008, respectively. The two projects increase the number of orders for automation solutions for Chinese hot-rolling mills to a total of five in the current fiscal year.

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.

For more information, please send your e-mails to swm@infothe.com.

ⓒ2007 www.SecurityWorldMag.com. All rights reserved.