Novotroitsk branch of the National University of Science and Technology “MISIS” (Novotroitsk, Russia):

D. R. Ganin, Engineer, e-mail: dmrgan@mail.ru
A. A. Panychev, Cand. Eng., Associate Prof., Dept. of Metallurgical Technology and Foundry Processes

Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia):
V. G. Druzhkov, Cand. Eng., Associate Prof., Dept. of Metallurgical Technology and Equipment

“TOREKS” Scientific and Production Corporation (Ekaterinburg, Russia):
I. S. Bersenev, Cand. Eng., Head of Agglomeration Equipment & Technology Group

Currently, a significant increase in technical and economic indicators of agglomerate production can be achieved in the conditions of JSC «Ural Steel» only by modernizing the equipment of the sintering shop. However, the use of mineral additives in the agglomeration charge supplied in the pulp during pelletization can be considered as an effective and relatively easy way to improve the quality of the agglomerate. In this paper we present the results of a study of the mineralogical composition of agglomerates obtained with the use of additives from brown ironstone ores of the Novokievsky deposit, clays of the Voskresenskoye deposit, serpentinitomagnesite of the Khalilovskoye field. A mechanism for improving the quality of the agglomerate was clarified on this basis. Iron ore agglomerates, obtained in a «sintering bowl» type installation, were used as the research objects. Scanning electron microscopy was used to determine the chemical composition of minerals, and the minerals themselves were classified into ore minerals, ferrocalciumolivines, high-iron minerals, calcium silicates, dicalcium silicate, and others. Analysis of the obtained data showed that the reasons for improving the quality of the agglomerate of JSC «Ural Steel» with the use of additives of brown ironstone ores, bentonite clays and serpentinitomagnesites are an increase in the temperature and heat level of the sintering process and the formation of a silicate binder with impurities preventing the formation of dicalcium silicate and softening of the sinter at its polymorphic transformation during cooling. The realization of additives contributed to the improvement in the granulometric composition of the agglomeration charge, which led to an intensification of the combustion process of fuel and increased heat transfer.

1. Kurunov I. F. State and trends in development of world iron metallurgy in the light of challenges of the XXI century. Iron metallurgy — challenges of XXI century. Proceedings of VIII International congress of blast-furnace workers. Moscow: Kodex, 2017. pp. 10–20.
2. Matsumura M., Hoshi M., Kawaguchi T. Effects of mineral matrix on softening property and reduciability at dolomite sinter. Tetsu-to Hagane. 2006. Vol. 92, No. 12. 865 p.
3. Tretyak А. А. Blust-furnace production in Russia in 2011–2016 in the light of challenges of XXI century. Iron metallurgy — challenges of XXI century. Proceedings of VIII International congress of blast-furnace workers. Moscow: Kodex, 2017. pp. 21–34.
4. Shparber L. Ya. Iron metallurgy in 2 volumes. Vol. 1. History. State. Tula: ASSOD, 1996. 416 p.
5. Anisimov N. K., Naftal M. N., Maslov E. V., Burzev D. L., Solodukhin А. А., Bersenev I. S. Modernization of production of JSC “Ural Steel” as part of strategy of development of holding “Metalloinvest”. Metallurg, 2016. No. 7. Pp. 4–6.
6. Ganin D. R., Druzhkov V. G., Panychev А. А., Shapovalov A. N. Improvement of agglomeration production efficiency by introduction of additives-activators as pulp in the charge during pelletizing. Iron metallurgy — challenges of XXI century. Proceedings of VIII International congress of blast-furnace workers. Moscow: Kodex, 2017. pp. 471–479.
7. Ganin D. R., Druzhkov V. G., Panychev А. А., Shapovalov A. N., She vchenko E. A. Study of the effect of Khalilov deposit serpentinitemagnesite addition on agglomeration process performances in JSC «Ural Steel». Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universitets im. G. I. Nosova, 2017 Vol. 15. No. 1. pp. 20–26.
8. Zhang M., Andrade M. W. Effect of MgO and basicity on microstructure and metallurgical properties of iron ore sinter. Characterization of Minerals, Metals & Materials, 2016. pp. 167–174.
9. Zhang M., Andrade M. W. Effect of alumina and magnesia on microstructure and mineralogy of iron ore sinter. Characterization of Minerals, Metals & Materials, 2017. p. 291–299.
10. Babich A., Senk D., Gudenau H. W., Mavrommatis K. Th. Ironmaking. Aachen: RWTH Aachen University Department of Ferrous Metallurgy. 2008. 402 p.
11. Malysheva T. Ya., Dolizkaya О. А. Petrography and mineralogy of iron ore raw materials: tutorial for higher educational institutes. Moscow: MISiS, 2004. 424 p.
12. Bazilevich S. V., Vegman E. F. Agglomeration. Moscow: Metallurgiya, 1967. 367 p.
13. Sinter and pellets production. Reference book. Edited by Yusfin Yu. S. Moscow: Metallurgiya, 1984. 212 p.
14. Molel М. S., Lyadova V. Ya., Chugunova N. V. Ferrit formation in iron ore raw materials. Moscow: Nauka, 1990. 150 p.
15. Puzanov V. P., Kobelev V. А. Structurization from small-sized materials with participation of liquid phases. Ekaterinburg: UrO RAN, 2001. 631 p.
16. Puzanov V. P., Kobelev V. А. Fundamentals for formation of iron ore agglomerates functional properties. Ekaterinburg: 2015. 352 p.
17. Yushina T. I., Petrov I. M., Krylov I. O., Pak S. G. Analysis of technologies and practice of limonite ore processing. CIS Iron and Steel Review. 2015. No. 1. pp. 5–8.