Journals →  Chernye Metally →  2022 →  #6 →  Back

ArticleName The influence of the –0.5 mm fraction content in solid fuel on the performance of the agglomeration process in the conditions of PJSC "NLMK"
DOI 10.17580/chm.2022.06.01
ArticleAuthor T. V. Prokhorova, D. A. Neugodov, E. A. Milokhin, O. A. Semenov

Novolipetsk Steel Company (NLMK), Lipetsk, Russia:

T. V. Prokhorova, Engineer, Technology Development Department, e-mail:
D. A. Neugodov, Engineer, Technology Development Department
E. A. Milokhin, Head of the Iron Production Technologies Group, Technology Development Department
O. A. Semenov, Head of the Sintering Shop


The sintering process of agglomerate, its mineralogical composition and its structure are influenced by granulometric composition of solid fuel. It is considered to be, that the increasing portion of small fractions less than 0.5 mm in the structure of the agglomeration can lead to reduction of specific productivity, yield of suitable agglomerate, vertical sintering rate, deterioration of the strength characteristics of the agglomerate. The work describes the results of conducting semi-industrial and industrial experiments about removal of a fraction less than 0.5 mm from the composition of solid agglomeration fuel at the Agglomeration factory of Novolipetsk Steel Company (PJSC NLMK). It is analyzed technology of preparation solid agglomeration fuel for agglomeration in the conditions of NLMK, the degree of destruction of coke fines at all stages of its preparation for the sintering process is also estimated. The analysis of the influence of the content of –0.5 mm fraction and +3 mm fraction in the composition of solid agglomeration fuel on the technical and economic indicators of the agglomeration process in the conditions of NLMK was performed. It is revealed that during selecting the fractional composition of agglomeration fuel, its size should correspond to the size of the charge materials, and with the predominance of fine-grained materials (such as iron ore concentrate) in the composition of the agglomeration charge the fine fraction of –0.5 mm of solid agglomeration fuel during sintering does not have a noticeable negative impact on the technical and economic indicators of the sintering process, nor on the quality of the finished product. In the course of the conducted studies, there was no improvement in the parameters of the sintering process or the quality of the agglomerate with a decrease in the fraction of –0.5 mm in the composition of the solid agglomeration fuel for the existing agglomeration production at NLMK.

keywords Agglomeration production, agglomeration charge, agglomeration fuel, coke fines, roll crusher, agglomerate quality, sintering rate

1. Shapovalov А. N., Ovchinnikova Е. V., Maystrenko N. А. Improving the quality of preparation of the sinter charge for sintering in the conditions of JSC "Ural Steel". Metallurg. 2015. No. 3. pp. 30–36.
2. Тen S. B., Mikhalevich А. G., Boranbaev B. М. et. al. Improvement of fuel efficiency in agglomeration. Stal. 1980. No. 10. pp. 868–870.
3. Mikhaylov V. G., Ryazhskikh А. А., Putilin Е. А. Influence of size of sintering fuel on sintering performance and quality of sinter from KMA concentrates. Modern metallurgy at the beginning of the new millennium: collection of scientific works. Lipetsk: Izdatelstvo LGTU, 2007. Part 3. pp. 68–75.
4. Won S. Y., Kim B. C., Seo Y. S., Yoon H. J., Lee H. M., Choi Y. H. Controlling of fuel particle size to minimize dust emission and improve productivity in iron ore sintering process. 8th International Congress on Science and Technology of Ironmaking - ICSTI 2018.
5. Titov V. I., Iskalin V. I., Grigoryev N. Е. et. al. Optimization of particle size distribution of solid sintering fuel. Metallurg. 2005. No. 1. pp. 15, 16.
6. Karabasov Yu. S. et. al. On the mechanism of influence of coke breeze size on the sintering process. Izvestiya vuzov. Chernaya metallurgiya. 1975. No. 11. pp. 22–26.
7. Efimenko G. G., Vlasov V. G. Et. al. Influence of fuel size on the quality of agglomerate from finely ground concentrate. Metallurg. 1970. No. 10. pp. 3, 4.
8. Niesler M., Stecko J., Blacha L., Oleksiak B. Application of fine-grained coke breeze fractions in the process of iron ore sintering. Metalurgija. 2014. Vol. 53. pp. 37–39.
9. Korshikov G. V. et. al. Influence of the method of fuel feeding, its type and size on the indicators of the process of sintering the charge from KMA ores. Message I. Izvestiya vuzov. Chernaya metallurgiya. 1971. No. 6. pp. 39–42.
10. Vanyukova N. D. Study of the influence of the quality of sintering fuel on the content of residual carbon in the sinter. Vestnik Priazovskogo gosudarstvennogo tekhnicheskogo universiteta. 2001. No. 11. pp. 1–4.
11. Dabbagh A., Moghadam A., Naderi S., Hamdi M. A study on the effect of coke particle size on the thermal profile of the sinters produced in Esfahan Steel Company (ESCO). The Journal of The Southern African Institute of Mining and Metallurgy. 2013. Vol. 113. pp. 941–945.
12. Kotov V. G. On the indicator of the chemical completeness of combustion of the fuel of the sintering charge. Izvestiya vuzov. Chernaya metallurgiya. 1980. No. 10. pp. 24–27.
13. Chuprinov Е. V., Lyalyuk V. P., Zhuravlev F. М., Lyakhova I. А., Kassim D. А. Optimization of technological parameters of sintering the sinter with solid fuels of different reactivity. Vestnik Priazovskogo gosudarstvennogo tekhnicheskogo universiteta. 2015. No. 30. pp. 36–40.
14. Ganin D. R., Druzhkov V. G., Panychev А. А., Shapovalov А. N. Analysis of methods for estimating the equivalent diameter of granules of pelletized sintering charge in the conditions of JSC "Ural Steel". TiTMP. 2015. No. 1 (16). pp. 5–11.
15. GOST 15137–77. Iron and manganese ores, agglomerates and pellets. Determination of tumbler strength. Introduced: 01.01.1978.
16. Nechkin G. А., Kobelev V. А., Kurunov I. F., Semenov О. А., Isaenko G. Е., Titov N. А. Study of the distribution of solid fuel along the height of the layer of sintering charge. Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii. 2015. No. 9. pp. 32–38.
17. Vegman Е. F., Zherebin B. N., Pokhvisnev А. N., Yusfin Yu. S. et. al. Iron metallurgy. Moscow: Akademkniga, 2004. 774 p.
18. Korotich V. I., Frolov Yu. А., Bezdezhskiy G. N. Agglomeration of ore materials. Ekaterinburg: GOU VPO «UGTU-UPI», 2003. 400 p.

Language of full-text russian
Full content Buy