The modernization is scheduled for completion in the third quarter of 2019. The “Connect & Cast” principle, based on preconfigured and pretested packages forms the basis for a fast plant start-up.
Angang is part of the Anshan Iron & Steel Group Co., one of China’s leading steel producers with an annual production of more than 35.7 million metric t (2017), and is located in Anshan in Liaoning Province. Steel works no. 1 in Anshan employs a conversion route with a basic oxygen converter, ladle furnace and RH plant. The single-strand continuous slab caster CCM1 in steel works no. 1, originally installed in 1999, has a production capacity of 1 million metric t/a. Its machine radius is 10.6 m and the metallurgical length amounts to 34.7 m. The caster produces slabs with a thickness of 250, 300 and 360 mm in a width range of 1,500 to 2,000 mm. Casting speeds vary from 0.4 to 1,5 m/min. The plant processes medium-carbon to high-carbon steels, micro-alloyed, low-alloyed, alloyed and high-alloyed steels as well as pipe and plate grades.
Precise knowledge of the final solidification point and the associated soft reduction is needed to reliably produce slabs for steel grades that require high internal quality. The new SRD segments from Primetals can be applied to the final solidification precisely. This enables each individual roll gap to be adjusted dynamically as a function of the steel grade, overheating, cooling or casting speed. Each roll transmits an individual force, which makes even higher thickness reduction rates possible, and reduces the segregation and porosity in the center of the strand. SRD segments are designed for long operating cycles and easy maintenance. For example, each roll has its own overload protection, which prevents damage to the bearings and surfaces of the rolls. The rolls are embedded in a function unit so that they can be quickly replaced either in a maintenance workshop or directly on the caster during a break in production. The individual roll units can also be tested and calibrated before installation in the segments.
_{(Source: Primetals Technologies, Limited)}