Siemens receives final acceptance certificate for 4.3 meter plate mill from Jinan Iron & Steel

(PresseBox) ( Linz, Austria, )
In December 2011, Siemens VAI Metals Technologies received the final acceptance certificate for the new 4.3 meter plate mill in Jinan from the Chinese company, Jinan Iron & Steel Group Co. (Jigang). The mill is designed to produce 1.8 million tons of plate per annum. Siemens handled the project engineering, and supplied mechanical equipment as well as drives and automation for the new rolling mill.

Jigang awarded Siemens the order for the new plate mill, which had a value in the mid double-digit million euro range, at the beginning of 2008. The plate rolling mill in Jinan, Shandong Province, comprises three heating furnaces, a double-stand rolling mill, cooling beds, a shearing line, and a finishing shop. Siemens provided the mechanical equipment for the finishing stand, which is equipped with SmartCrown technology, the Mulpic intensive cooling system with ACDQ (accelerated cooling / direct quenching), a hot plate leveler, a double side shear, and a cold plate leveler. The other mechanical components were provided by Jigang.

Siemens was also responsible for all the process models for the heating furnaces and the rolling plant, the entire automation and instrumentation, as well as a system for tracking material from insertion into the furnace to transfer of the "ready for shipment" plates to the distribution center. Sinamics SM150 voltage source converters supply the three-phase synchronous motors which power the main drives on the roughing and finishing stands. Two motors, each with a power of nine megawatts, deliver the requisite rolling forces. The entire solution is based on the integrated Siroll PM concept for plate rolling mills.

The new line can roll products ranging in thickness from six to 120 millimeters and in breadth from 1,500 to 4,100 millimeters. The maximum plate weight is approximately 22 tons. Such plates are used, for example, in the shipbuilding, and oil & gas industries.

Jigang is part of the Shan Steel Group. The new rolling mill increases Jigang's production capacity to around five million tons of heavy plate per annum, which makes the company one of the largest producers in China.

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