Severstal Increases CherMK Converter Steel Production
Russian steel maker Severstal has completed a set of measures to increase the daily volume of converter steel melts from 82 to 86 at the Cherepovets Steel Works. The final project was the overhaul of the continuous casting plant No 4, UNRS-4. In particular, UNRS-4 was equipped with a new secondary cooling system, which automatically changes the cooling intensity of the cast billet depending on the casting speed, metal temperature, chemical composition of the steel grade and the width of the cast billet. Also, at UNRS-4, five-roller sections were replaced with new units with middle supports.
Teams of the steelmaking production of CherMK, the directorate for investments and the directorate for repairs of Russian Steel, as well as contractors from Cherepovets: Prokatmontazh-3, RusRegionStroy, STA-electric, ASM-group. The reconstruction of the URNS-4 was carried out in 26 days 15 hours instead of the planned 32 days.
Modernization of the UNRS-4 will allow to reduce the modifications due to deviations in the quality of the surface of slabs and rolled products, to increase productivity by increasing the overhaul intervals, to reduce downtime, to increase the casting speed, as well as the durability of the equipment from 1500 to 2200 heats.
At Investor Day in March 2021, Severstal announced a target forecast for steel production in 2023 to13 million tonnes. Modernization of UNRS-4, along with UNRS-1, which was completed last year, is one of the sources for achieving long-term goals. In total, Severstal allocated RUB 1.5 billion to modernize these two units as part of Severstal’s comprehensive program to increase the production of high-quality steel at the Cherepovets Steel Works.