Primetals Technologies engineered and supplied the mechanical, electrical and process control equipment for the cold strip mill. The PLTCM and the annealing and galvanizing lines are to share an integrated automation system that consists of basic (level 1) and process automation (level 2) and of process models developed specially for cold rolling mills. All parts of the plant can therefore be precisely coordinated, ensuring high availability and yield with uniformly high product quality.
The tandem mill will consist of five six-high rolling stands. High-strength steels, in particular, can be rolled within narrow tolerances. SmartCrown rolls and special actuators and closed-loop control systems will ensure the required flatness of the finished product. Input strips are 1.5 to 6 mm thick and their final thickness lies between 0.2 and 2.5 mm. Strips of 700 to 1,600 mm width are rolled.
All systems and components are derived from Primetals Technologies´ automation solution concept for cold rolling mills. Primetals Technologies also handled installation supervision and commissioning of the cold strip mill.
Tangshan Iron and Steel belongs to the Hesteel Group, China's biggest steel producer with an annual production of around 47.7 mio. t (2015). The Tangshan production location has been in existence for more than 70 years. In the past few years, Primetals Technologies has supplied an AOD converter, a vacuum decarburization system and a continuous galvanizing line to Tangshan and also linked up the tandem cold mill to the existing pickling line.
(Source: Primetals Technologies)