Journals →  Chernye Metally →  2022 →  #3 →  Back

Agglomeration and Production of Cast Iron
ArticleName Study of physicochemical properties of high-quality sinter from factory No. 5 of PJSC MMK during reduction in a hydrogen medium
DOI 10.17580/chm.2022.03.01
ArticleAuthor S. K. Sibagatullin, A. S. Kharchenko, V. I. Sysoev, A. A. Polinov

Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia:

S. K. Sibagatullin, Dr. Eng., Professor, Dept. of Metallurgy and Chemical Technologies
A. S. Kharchenko, Dr. Eng., Associate Professor, Head of the Dept. of Metallurgy and Chemical Technologies, e-mail:
V. I. Sysoev, Postgraduate Student, Dept. of Metallurgy and Chemical Technologies


Magnitogorsk Iron and Steel Works, Magnitogorsk, Russia:
A. A. Polinov, Head of Mining and Processing Production


Abstract: The research on the reduction of iron ore materials with a particle size of 12–15 mm by hydrogen (flow rate 20 l/h) under a load of 60 kPa during isothermal holding at temperatures of 500, 700 and 1050 °C was carried out in the laboratory of the chair for Metallurgy and Chemical Technologies of the FSBEI HE Nosov Magnitogorsk State Technical University. At a temperature of 1050 ºC, the reduction of the factory No. 5 sinter to a reduction degree of 25% proceeded at a rate of 0.0476% O2/min. At the end of reduction, the shrinkage of the sinter sample was 6.1% of the layer height, which provided a gas pressure drop of 0.27 kPa. The rate of recovery of the sinter from plant No. 5 compared to the rate of reduction of the mixture of sinter from plant No. 5 with pellets from SSGPO or Mikhailovsky MPP in equal proportions is higher on average by 5.1% (rel.) and 7.4% (rel.) at temperatures and degrees recovery 700 ºC and 15%, 1050 ºC and 25%, respectively. The shrinkage of the agglomerate compared to that of the pellets with the same reduction parameters was 1.3 and 2 times smaller, respectively. At a temperature of 1050 ºC and a material reduction ratio of 25%, the gas pressure drop in the sinter bed from Factory No. 5 was 3.7% lower than the gas pressure drop passing through the mixture of sinter with pellets from both manufacturers. The reduction rate of the mixture of sinter from plant No. 5 with SSGPO pellets, compared to the mixture of sinter from plant No. 5 with pellets from the Mikhailovsky MPP, is on average 7.6% (rel.) higher at a reduction temperature of 700–1050 ºC and a reduction degree of 15–25 %.
The paper was prepared under support of the grant of RF President № MD-1064.2022.4.

keywords High quality sinter, hydrogen, reduction of iron ore materials, pellets, strength, reducibility, shrinkage, softening

1. Sibagatullin S. K., Kharchenko А. S. The quality of charge materials for blast-furnace smelting, including titanomagnetites and siderites. Magnitogorsk, 2012. 150 p.
2. Dmitriev А. N., Shumakov N. S., Leontev L. I., Onorin О. P. Fundamentals of the theory and technology of blast-furnace smelting. Ekaterinburg: UrO RAN, 2005. 545 p.
3. Dmitriev А. N. Analytical study of the influence of the quality of titanomagnetite raw materials on indicators of blast-furnace smelting. Izvestiya vuzov. Chernaya metallurgiya. 2017. Vol. 60. No. 8. pp. 609–615.
4. Vitkina G. Yu., Dmitriev А. N., Alektorov R. V. Study of the main metallurgical characteristics of iron ore materials (agglomerate and pellets). Industrial production and metallurgy: Proceedings of the international scientific and technical conference. Ekaterinburg, 2020. pp. 132–137.
5. Vyaznikova Е. А., Dmitriev А. N., Vitkina G. Yu., Alektorov R. V., Ovchinnikova L. А. Some features of the mineralogical composition of iron ore agglomerates. Prospects for the development of metallurgy and mechanical engineering using completed fundamental research and R&D: Proceedings of the scientific-practical conference with international participation and elements of the school of young scientists: the 65th anniversary of the Baykov Institute of Metallurgy and Materials Science, UB RAS. Ekaterinburg, 2020. pp. 195–198.
6. Bersenev I. S., Kleyn V. I., Matyukhin V. I., Yaroshenko Yu. G. Method for assessing the quality of iron ore sinter by its chemical composition. Izvestiya vuzov. Chernaya metallurgiya. 2009. No. 10. pp. 3–6.
7. Sibagatullin S. K., Kharchenko A. S., Savchenko G. Yu., Beginyuk V. A. Blast furnace performance improved through optimum radial distribution of materials at the top while changing the charging pattern. CIS Iron and Steel Review. 2018. Vol. 16. Iss. 2. pp. 11–15.
8. Kharchenko А. S. Regularities of feeding charge components by size from the BLT into the top space of the furnace, depending on the loading conditions. Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta imeni G. I. Nosova. 2018. Vol. 16. No. 3. pp. 46–56.
9. Jiménez J., Mochón J., de Ayala J. S. Mathematical Model of Gas Flow Distribution in a Scale Model of a Blast Furnace Shaft. ISIJ International. 2004. Vol. 44. Iss. 3. pp. 518–526.
10. Pykhteeva К. B., Zagaynov S. А., Tleugabulov B. S. Et. al. Analysis of the features of the formation of portions and the discharging of materials from the BLT when loading the charge. Stal. 2008. No. 6. pp. 14–19.
11. Vorontsov V. V., Stepanov А. Т. On the question of the distribution of charge materials around the circumference of a blast furnace top. Vestnik Cherepovetskogo gosudarstvennogo universiteta. 2010. No. 1. pp. 129–133.
12. Tovarovskiy I. G. Predictive assessment of the effect of charge materials along the top radius on the processes and indicators of blast-furnace smelting. Metallurg. 2014. No. 8. pp. 46–52.
13. Zhao Huatao, Zhu Minghua, Du Ping. Uneven distribution of burden materials at blast furnace top in bell-less top with parallel bunkers. ISIJ International. 2012. Vol. 52. Iss. 12.
pp. 2177–2185.
14. Sibagatullin S. K., Kharchenko A. S., Chernov V. P., Beginyuk V. А. Improvement of blast-furnace practice due to creation of the conditions for elevation of natural gas consumption via usage of raw materials with increased strength. Chernye Metally. 2017. No. 8. pp. 27–33.
15. Tonkikh D. А., Karikov S. А., Таrakanov А. К. et. al. Improvement of the modes of loading and blasting at blast furnaces of PJSC MK Azovstal. Metallurg. 2013. No. 9. pp. 42–48.
16. Bahgat M., Abdel Halim K. S., El-Kelesh H. A., Nasr M. I. Enhancement of wüstite reducibility in blast furnace: Reaction kinetics and morphological changes. Ironmaking and Steelmaking. 2012. No. 39(5). pp. 327–335.
17. Bahgat M., Abdel Halim K. S., El-Kelesh H. A., Nasr M. I. Blast furnace operating conditions manipulation for reducing coke consumption and CO2 emission. Steel Research International. 2012. No. 83(7). pp. 686–694.
18. Onorin О. P., Spirin N. А., Lavrov V. V., Kosachenko I. Е., Rybolovlev V. Yu. Evaluation of the shape of the zone of viscoplastic masses of iron ore materials in a blast furnace by mathematical modeling. Izvestiya vysshikh uchebnykh zavedeniy. Chernaya metallurgiya. 2013. No. 6. pp. 24–29.
19. Pavlov А. V., Onorin О. P., Spirin N. А., Polinov А. А. Operation of OJSC MMK’s blast furnaces with a high proportion of pellets in the charge. Part 1. Metallurg. 2016. No. 6. pp. 36–42.
20. Dmitriev А. N. Mathematical modeling of the blast furnace process. Ekaterinburg: UrO RAN, 2011. 162 p.
21. Sibagatullin S. K., Kharchenko A. S., Savinov A. S., Gushchin D. N., Mazur I. P. A development of the adaptive technology of sinter production at PJSC MMK. Journal of Chemical Technology and Metallurgy. 2018. Vol. 53(5). pp. 990–994.
22. Nekrasov Z. I., Gladkov N. А., Dozorov G. М. Et. al. Changes in properties of sinter and pellets in the process of reduction-heat treatment. Sbornik. Metallurgiya chuguna. 1973. No.1. pp. 24–36.
23. Goldshtein N. L. Hydrogen in blast furnace process. Moscow: Metallurgiya, 1971. 208 p.
24. Kolokoltsev V. M., Bigeev V. А., Sibagatullin S. K., Borodin А. А. Limiting degree of hydrogen utilization in reactions of iron reduction from oxides. Teoriya i praktika metallurgicheskogo proizvodstva. 2010. No. 10. pp. 4–11.

Language of full-text russian
Full content Buy