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Accordingly, NLMK has embarked on the stove overhauls at BF No. 4 with a capacity of 2.1 million mt of pig iron. The maintenance works are expected to be completed without stopping the blast furnace.

Overall, within the project plan, it is scheduled to successively replace three stoves, units that reduce fuel consumption in pig iron production by heating up and supplying oxygen-enriched air into the blast furnace. According to the company’s announcement, as a part of the upgrade, the furnace was already equipped with dedusting systems with a 99.9 percent purification rate. All the filtered dust is now reintroduced into the production process as ferrous raw material for pig iron manufacturing, and the purified blast furnace gas is used as a secondary energy resource.