Siemens Modernizes Cooling Section of Hot Rolling Mill No. 2 at Wisco
New power cooling headers will be installed, the laminar cooling headers will be partly replaced with turbo laminar cooling headers and the cooling model will be updated to the state of the art. The higher cooling rates will enable Wisco to produce additional steel grades, in particular for the automotive industry and pipeline construction. At the same time, the use of expensive alloying agents can be reduced thanks to improved strip cooling. Modernization of the cooling system is due to be completed in February 2015.
Pictured below: Cooling unit from Siemens in a hot strip mill
With an annual production capacity of 5.6 million metric tons of hot strip, Wisco's hot rolling mill No. 2 in Wuhan, Hubei province, which commenced operation in 2003, is one of the most productive plants in China. It produces strips with widths of between 700 and 2,130 millimeters and thicknesses ranging from 1.2 to 25.4 millimeters. The plant is equipped with an automation solution from Siemens based on the Siroll HM plant concept. An upgrade of the Simatic PCS7 process control system was performed in 2012.
To enable Wisco to further expand its market position with new high-strength and API (American Petroleum Institute) grades such as X100, Siemens is installing power cooling headers directly downstream of the finishing mill and is replacing some of the existing cooling headers in the laminar cooling line with turbo laminar cooling headers. Moreover, the existing cooling section process model will be replaced by a new cooling model with extended functionality for driving the cooling section actuators.
The new equipment will offer Wisco significantly higher cooling rates than before and enable production of materials that require a very fast early cooling. By application of these cooling rates, the necessity of adding expensive alloying agents is reduced for certain steel grades. The new cooling model ensures high control accuracy and tight temperature tolerances, thus providing homogeneous material properties. Cooling can be adapted flexibly to the steel grade currently in production.
Wisco, founded in 1955, was China's largest iron and steel production complex at the time and has been producing steel since 1958. The company is headquartered in Wuhan and has around 80,000 employees. In 2012, it was one of the world's largest producers, with production of over 37 million tons of steel.