MMK's sheet rolling shop No. 4 celebrated its 60th anniversary

On December 27, 1960, a continuous hot strip mill 2500 was launched at the Magnitogorsk Iron and Steel Works. This date became the birthday of MMK's sheet-rolling shop No. 4, which turned 60 yesterday.

Over the years, the 2500 mill produced about 190 million tons of hot rolled products. Despite its veteran age, Camp 2500 celebrates its anniversary completely renewed. This year, a comprehensive reconstruction of the unit was completed, thanks to which it is today one of the most modern and highly productive in the world. The large-scale reconstruction of Mill 2500 at Rolling Shop No. 4 made it possible to expand the size and grade of the mill. Now, in addition to the previous product range, it can produce new pipe steels of strength class K52-K60, Magstrong S550MC, S600MC, S700MC, AGRO22, AGRO23. The quality of products has significantly improved, and the production capacity of the unit has increased to 5.2 million tons of rolled metal per year. Today it is a highly automated unit whose products meet the highest international standards.

Large-scale reconstruction in the conditions of existing production began in 2007. Novokramatorsk Machine-Building Plant (NKMZ) became the manufacturer of the main technological equipment for the 2500 mill. In February 2018, PJSC MMK signed a contract with SMS group GmbH for the supply of equipment for the reconstruction of the finishing group of mill stands.

In July 2010, at mill 2500, a cut-to-length unit No. 3 was put into operation, designed for cutting strips into sheets of measured length with a cut edge with the output of products in the form of sheets laid in bundles.
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In 2012–2013 Instead of the previously operating six reheating furnaces, dismantled and taken out of operation, three new high-performance reheating furnaces of the Italian company Tenova with a wider hearth were built in the shop, which will allow receiving slabs up to ten meters long. The furnace capacity will be 370 tons of metal per hour (previously - about 100 tons, today - 280 tons). State-of-the-art heating technology guarantees reduced scale formation. In addition, the new furnaces are more economical and environmentally friendly: compared to the previous ones, they require half the amount of natural and coke oven gas to operate. The technological line was renewed as part of the roughing and finishing groups of stands, all transporting roller tables, coilers, a line for transporting and collecting coils.

In 2019, two new universal reversing stands with vertical and horizontal rolls were put into operation at the roughing group of the 2500 hot rolling mill. Basically they work in tandem, but each stand can also work autonomously, each with its own rolling mode. Also, new coilers No. 7-8 were launched, allowing