Журналы →  CIS Iron and Steel Review →  2017 →  №1 →  Назад

Название System improvement of vanadium hot metal process at EVRAZ NTMK
DOI 10.17580/cisisr.2017.01.03
Автор A. V. Kushnarev, V. V. Filippov, V. A. Mikhalev, B. S. Tleugabulov
Информация об авторе

Evraz NTMK (Nizhniy Tagil, Russia):

A. V. Kushnarev, Dr. Eng., Managing Director;
V. V. Filippov, Deputy Head of Technical Administration on Sintering, Coke and blast Furnace Operation, Valentin.Filippov@evraz.com
V. A. Mikhalev, Head of the Blast Furnace Bureau of Technical Administration, Vladislav.Mikhalev@evraz.com

 

Nizniy Tagil Technological Institute, Affiliate of the Ural Federal University (Nizhniy Tagil, Russia):
B. S. Tleugabulov, Dr. Eng., Associate Prof., bstz10@mail.ru

Реферат

Evraz NTMK boosted the rate of its blast furnace process and cut down the coke rate critically over the last decade. This progress was based on the improved design of NTMK blast furnaces themselves, as well as improved process conditions, V staflux practice introduced in the process, higher oxygen in the blast air and use of PCI. The blast furnaces after some upgrades gave a chance to improve certain process parameters of the blast furnace process that uses titanomagnetites. In particular, lower Si in the hot metal at the same temperature level of the hot metal as before was made possible thanks to the pressure of gases boosted inside the furnace. For improvement of burden conditions, it is related to developments of the practice for production and application of V staflux, which took raw materials out of the burden, reduced the number of components and fixed the problem of FeV waste disposal. The staflux implemented in the smelting process improved the venting quality of melting stock column and reduced specific gas output, which created a precondition for intensification and power saving activities without having to worry about any failures in the operation of the blast furnaces to be run smooth. Which is why higher oxygen in the blast air (at least 30%) plus PCI were the next logical steps taken to improve the ironmaking practice. The higher rate of the smelting process made it possible to shut down the other blast furnaces, which were obsolete and deteriorated, without any critical output loss. At the moment, the blast furnaces of Evraz NTMK show the best performance and cost-efficiency not only in Russia, but also throughout the world.

Ключевые слова Evraz NTMK, hot metal, vanadium, titanomagnetites, staflux, oxygen, pulverized coal (PC)
Библиографический список

1. Smirnov L. A., Deriabin Yu. A., Shavrin S. V. Vanadium titanomagnetites in the iron and steel process. Chelyabinsk : Metallurgiya, 1990. 256 p.
2. Sobyanina O. N., Zagainov S. A., Filatov S. V. Analysis of Titanium Reduction in a Blast Furnace. Steel in Translation. 2012. Vol. 42. No. 3. pp. 246–248.
3. Smirnov L. A., Kushnarev A. V. The Modern Status and Prospects for Processing the Vanadium-Containing Titanomagnetite Raw Materials in Russia. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii “Chernaya metallurgiya”. 2013. No. 5. pp. 3–20.

4. Kushnarev A. V. 75th Anniversary of the Nizhniy Tagil Iron and Steel Works. Chernye metally. 2015. No. 7. pp. 12–15.
5. Kushnarev A. V., Kirichkov A. A., Filippov V. V., Mikhalev V. A., Zagainov S. A., Tleugabulov B. S. Implementing innovative solutions to improve vanadium hot metal process at NTMK. Collection of summaries of reports read in the 1st Research and Practice Conference InTechMet-2008. Spb., 2008. pp. 76–77.
6. Inada T., Takatani K., Yamamoto T. et al. Effect of blast furnace profile variation in accordance with furnace volume on operation. CAMP-ISIJ. 2002. Vol. 15. No. 1. p. 125.
7. Inada T., Takatani K., Yamamoto T. et al. Effect of blast furnace profile on inner furnace states. Ibid. 2002. Vol. 15. No. 1. p. 126.
8. Blast furnace process in XXI century. Scientific papers of International Congress of Ironmakers. M. : Izdatelstvo «Kodeks». 2010. 560 p.
9. Geerdes M., Toxopeus H., van der Vliet C. Modern Blast Furnace Ironmaking: An Introduction. Amsterdam : IOS Press, 2009, 176 p.
10. Pykhteyeva K. B., Zagaynov S. A., Filippov V. V. et al. Review of specific features of composing material charges and of burden material flow from BLT bin while charging. Stal. 2008. No. 6. pp. 14–19.
11. Pykhteeva K. B., Zagainov S. A., Filippov V. V. et al. Stabilizing the composition of blast-furnace products from titanomagnetites with a nonconical loading trough. Steel in Translation. 2009. Vol. 39. No. 1. pp. 45–49.
12. Filatov S. V., Kirichkov A. A., Mikhalev V. A. et al. Smelting lowsilica hot metal at OAO NTMK. Steel in Translation. 2010. Vol. 40. No. 5. pp. 443–445.
13. Zagainov S. A., Filatov S. V., Sobianina O. N., Gordon Y. M. Technological solutions for intensive production of low silicon hot metal in blast furnace processing vanadium containing titania-magnetite. 6th Int. Congress on the Science and Technology of Ironmaking 2012 - ICSTI 2012. Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore. pp. 1406–1415.
14. Dunaiyev N. E., Kudriavtseva Z. M., Kuznetsov Yu. M. Injection of powder materials into blast furnaces. M. : Metallurgiya, 1977. 208 p.
15. Zhak R. M., Volkov Yu. P., Nikiforov V. N., Khromov V. A. The future for pulverized coal use in blast furnaces. Byulleten nauchnotekhnicheskoy i ekonomicheskoy informatsii “Chernaya metallurgiya”. 1981. No. 23 (907). pp. 3–15.
16. Chemikosov M.V. Basic principles for design of plants for pulverized coal injection into the blast furnace hearth. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii “Chernaya metallurgiya”. 2006. No. 8 (1280). pp. 25–28.
17. Filatov S. V., Zagainov S. A., Gileva L. Y., Kurunov I. F., Titov V. N. Influence of elevated pressure on blast-furnace performance. Steel in Translation. 2015. Vol. 45. No. 4. pp. 275–278.

Полный текст статьи System improvement of vanadium hot metal process at EVRAZ NTMK
Назад