MMK Launches Modernized CR Mill 1700 at Magnitogorsk
Russian steel maker Magnitogorsk Iron and Steel Works recently celebrated the launch of modernized 1700 two stand reversing cold rolling mill at MMK's sheet rolling shop No 5 in the city of Magnitogorsk in Russia. In February 2020, the operation of mill 1700 was stopped, after which MMK began its reconstruction. The main mechanical equipment of the double-stand reversing mill was supplied by SMS group & the subcontractors for the electronic support of the mill were Primetals Technologies & IMS. Construction and installation works under the control of the capital construction management of PJSC MMK were carried out by OJSC Prokatmontazh and LLC United Service Company. At present, commissioning and hot testing have been completed at Mill 1700, the assortment is being developed and work is underway to achieve the guaranteed contractual parameters and technological parameters of the mill. In the near future MMK will reach the design capacity of the mill, which is about 60,000 tonnes per month, and in total this year MMKK will be able to produce 350,000 tonnes of cold rolled steel at the unit.
The modern automated unit has significantly expanded MMK's capabilities in the production of high-quality cold-rolled steel, including for the needs of the automotive industry. On the reversing mill, for the first time at the mill, a new system for adjusting the flatness of the rolled sheet was applied, excluding such phenomena as widespread in rolling practice as the difference in thickness of the sheet at the edges or in the center. The mill uses a special type of bottle-shaped rolls with a complex profile and their manoeuvrability when moving up and down and relative to each other makes it possible to more flexibly respond to changes in the process of work.
The reversing mill, built in 2002, became the first cold rolling mill commissioned at MMK in the post-Soviet era. The equipment for the mill with a capacity of 800,000 tonnes of cold-rolled steel sheet was supplied by the German engineering company SMS Demag. Since its start up, Mill 1700 has produced over 9.35 million tonnes of cold rolled steel.