The CPL is designed to pickle hot rolled strip with thicknesses ranging from 0.8 to 7.0 mm, and widths from 750 to 1,630 mm, and handle coils weighing up to 33.6 metric t. The strip speed upon entry is 650 m/min, the pickling itself runs at 320 m/min, and speeds of up to 400 m/min are reached in the exit section.
Primetals was responsible for engineering and manufacturing and supplied all core equipment for the line. A heavy scale breaker was installed upstream of the pickling station, which has five flat turbulent pickling tanks fitted with an acid recirculating system.
Downstream there is a rinsing tank with five compartments, water recirculation system and strip drier. The strip then passes through a skin-pass mill and a tension leveler. The strip is then side-trimmed, before passing through an inspection station, to ensure it has the required surface quality. A flying shear is installed in the exit section.
Primetals also supplied the electrical and automation equipment and provided supervision of erection and commissioning. Shougang Jingtang took care of the associated civil works and the erection of the line.
Shougang Jingtang is part of the Shougang Group, which is one of the leading steelmakers in China, with a production amounting to 27.3 million metric t of steel in 2018. The company operates a number of CPLs, continuous annealing and continuous galvanising lines, processing the complete range of carbon steel, but mainly focusing on value added products like for example automotive exposed and non-exposed quality or appliances.
_{(Source: Primetals Technologies, Limited)}