Magnitogorsk Iron & Steel Works (MMK) has successfully modernized and commissioned the 2,500-millimeter hot strip mill at its Magnitogorsk location, jointly with SMS group. The upgrade included key equipment in the finishing mill and also a fundamental renewal of the electrical and automation systems.
MMK awarded the order in February 2018. Talking on project goals, Pavel Shilyaev, CEO of PAO MMK, pointed out that the revamp of hot strip mill 2500 is part of the corporate development strategy up to 2025.
The hot strip mill, which had been established and supplied in the 1960s by a Russian manufacturer, was modified during two shutdown periods. In the first shutdown in 2019, finishing stands F1 and F2 were realigned and the housing windows re-milled. The second and main shutdown in 2020 was used to fundamentally modernize the finishing mill area. SMS group replaced finishing stands F3 to F6 and installed new hydraulic roll gap adjustments and new work roll bending systems in the finishing mill. Thanks to these powerful actuators, MMK is now able to produce strips within narrow geometrical tolerances.
The large-scale project included the installation of a completely new X-Pact® automation system from SMS group. Prior to mounting on site, the system was installed in SMS group’s test center to be tested and pre-optimized under realistic conditions to the proven Plug & Work concept. In addition to basic automation systems, the scope comprised process models such as the X-Pact® Pass Schedule Calculation model for the roughing and finishing stands, the Contour and Flatness Control model X-Pact® PCFC, the X-Pact® Cooling Section Control model for strip cooling, a pacing system for the entire hot strip mill, the X-Pact® Vision operating and visualization system, and a broad range of measuring equipment and technology.
Moreover, SMS group renewed the finishing mill drive technology and supplied six main drives including converters, two new spur gear units and six pinion gear units as well as new drive spindles. New work roll and backup roll changing equipment and a new high-pressure hydraulic system for the
finishing stands were also part of the installed scope.
On June 18, 2020, the first coil was rolled on the revamped hot strip mill. As early as on November 15, 2020, the extensively modernized mill produced the first million tons of hot strip.