ArcelorMittal Kryvyi Rih Starts Modernization of BF 9
ArcelorMittal Kryvyi Rih has begun reconstruction of Blast Furnace No 9 that is 35-storeyed house high, produces 9 200 tonnes of hot metal per day, at an estimated cost of USD 270 million. After the restructuring, the raw material for the furnace will be not sinter only, but also pellets, which are the product of the new pellet plant. At the same time, the volume of hot metal production will increase upto 12 500 tonnes per day.After the upgrade, the total amount of dust emissions at BF 9 will be reduced significantly because of the new aspiration system and modern gas cleaning. ArcelorMittal Kryvyi Rih will complete the reconstruction of blast furnace No 9 by the end of 2023.
Back in 2019, ArcelorMittal Kryvyi Rih signed an agreement on the reconstruction of blast furnace No 9 with CISDI UK international company, which is one of the world leaders in implementation of large-scale engineering projects for the metallurgical industry. The contract includes the development of engineering and the supply of main equipment. The basic design of the reconstruction has already been completed, agreements have been concluded and detailed engineering has begun. Blast furnace No. 9 is already being prepared for large-scale construction. Now the company is organizing the sites for installation of equipment and storage facilities.
Modernization of BF 9 will allow it to work effectively for the next 20 years. Pulverized coal fuel will be used instead of expensive natural gas. The total consumption of fuel gas, coal and coke will decrease, and, accordingly, the primecost of hot metal will be lower. Currently, large volumes of water are used to cool the blast furnace, but after the repair, the unit will operate with a new type of water cooling. For this, the furnace’s casing will be strengthened and cast iron and copper cooling plates with silicon carbide refractories will be installed. As of now the blast furnace slag is cooled by a powerful stream of water, then according to the new technology, the slag gets into the granulation tank with in-built condensation tower, which reduces water consumption. New gas cleaning plant will allow increasing of blast furnace gas cleaning efficiency upto 5 miligrams per cubic meter. This gas will be consumed as fuel within the plant itself. New cast house will be flat with covered runners that will significantly improve the working atmosphere at сast floor. There will be two aspiration system with bag filter technology to remove dust and other emissions that can pollute the atmosphere.
In total, ArcelorMittal Kryvyi Rih operates with four blast furnaces. Furnace No 9 is the largest of them, built in 1974. Now its useful volume exceeds 5 000 cubic meters.