Primetals technologies received an order in late January to supply a 6 strand tandem cold mill (TCM) for a new plant of ShougangQian’an Electric Vehicle Electrical Steel Co., Ltd. (ShougangQian’an) in Qian’an City, Hebei Province, China.
The TCM has been designed as Hyper Universal Crown Control Mill (Hyper UC-mill), which employ small diameter rolls meant for reducing rolling loads. This allows for the production of thinner and harder materials which offers improved product quality.
All six strands of this mill are equipped with a work roll shift function, marking its first function of this mill type, to enable precise edge profile control of high-grade electrical steels. Additionally, the mill saves investment and maintenance costs. This mill will enable ShougangQian’an to meet the growing demand for electrical steels spurred by increasing requirements for end uses in e.g. vehicle electrification and AHSS-grades. Start-up is expected for mid-2022.
The Hype UC- mill was developed by Primetals Technologies to offer better and improved performance of strip gauge and flatness control for High Strength Steel (HSS) rolling. This technology also applies to rolling high grades of non grain-oriented silicon steel and thin products. The technology is based on an optimized roll diameter combination (work, intermediate, and back-up rolls) to employ smaller diameter work rolls for achieving the maximum reduction ratio, and a work roll driven system to achieve high flatness controllability.
ShougangQian’an is part of the Shougang Group Co., Ltd. which produced 27.4 million metric tons of steel in the year 2018. Previous projects with this customer included the supply of four 20hi-HZ-mills for the production of high permeability grain-oriented (HGO) and a PL-TCM for the production of non grain-oriented (NGO) steel grades.
Primetals Technologies is responsible for engineering and supply of the mill as well as for supervision of erection and commissioning. The mill type is well-suited to cold-roll such harder and thinner materials with high quality and high productivity by utilizing smaller work rolls driven by a work roll drive system. It will produce electrical steel grades, AHSS grades, tin grades, etc. in thickness between 0.18 and 2.5 mm with widths ranging from 750 to 1,320 mm.
Source: primetals.com
