Journals →  Chernye Metally →  2023 →  #3 →  Back

Ore Dressing
ArticleName Experimental studies of the pelletizing process of reground iron ore concentrate from Stoilensky GOK using new compositions of bentonite-polymer binders
DOI 10.17580/chm.2023.03.01
ArticleAuthor D. A. Vetugov, T. N. Matveeva

Bentonite of Khakassia Ltd., Chernogorsk, Russia1 ; Research Institute of Comprehensive Exploitation of Mineral Resources named after Academician N. V. Melnikov (ICEMR RAS), Moscow, Russia2:

D. A. Vetyugov, Mineral Processing Technologist1, Postgraduate Student2, e-mail:


Research Institute of Comprehensive Exploitation of Mineral Resources named after Academician N. V. Melnikov (ICEMR RAS), Moscow, Russia:

T. N. Matveeva, Dr. Eng., Deputy Director for Research, Head of the Dept. of Complex Extraction of Mineral Components from Natural and Technogenic Raw Materials, e-mail:


In this article, we present the results of the experimental studies of new compositions of bentonite-polymer composites (BPC) for use as a binder in the process of Stoilensky GOK (SGOK) iron-ore pelletizing. The alkali-activated bentonite clay from the 10th Khutor (Republic of Khakassia) was used as the main ingredient of the BPC. The bentonitepolymer composites used in this work are mixtures of organic polymer and bentonite clay with improved binding and strengthening properties. The polymer binders are presented by the domestic high-viscosity binders (in the composition of BPC-1 and BPC-3) used to improve the viscosity and filtration characteristics of the materials. Experimental data were compared with the basic characteristics of pellets from the charge of the JSC SGOK pelletizing plant. During these studies were defined the possibility of bentonite consumption reduction by 20 %, 30 %, and 50 % by adding bentonite-polymer composite to the charge. The analysis of the laboratory test results of green and dry pellets including moisture content, size distribution, compressive strength, and green drop, allowed defining the optimal composition of bentonite-polymer composite and its consumption in charge during pelletizing. It is established that replacing pure bentonite with BPC-1 allowed reducing the binder consumption by 30%, providing a more homogeneous pellet size distribution with improved strength characteristics.

The authors express their gratitude to the staff of the laboratory of pelletizing of Bentonite of Khakassia Ltd. and personally to the head of the project "Bentonite in the production of metallurgical raw materials" V. I. Lebedeva for their assistance in conducting research.

keywords Iron-ore concentrate, pelletizing, bentonite, polymer additives, bentonite-polymer composite, green iron ore pellets, dry iron ore pellets

1. ITS 2021. 25. Information and technical guide to the best available technologies. Mining and enrichment of iron ores. p. 15.
2. Pelevin А. Е. Ways to improve the efficiency of iron ore beneficiation technology. Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii. 2019. Vol. 75. No. 2. pp. 137–146.
3. Vetyugov D. А., Russkiy А. V., Zhigarev V. V. Bentonite is a mineral raw material for the production of iron ore pellets. Proceedings of the 5th International scientific school "Problems and prospects for the integrated development and conservation of the earth interior". Moscow: IPKON RAN. 2022. 404 p.
4. Doroshenko М. V., Bashlykova Т. V. Technological properties of minerals. Handbook for technologists. Moscow: Teploenergetik, 2007. 296 p.
5. Hao Liu, Bing Xie, Yue-lin Qin. Effect of bentonite on the pelleting properties of iron concentrate. Journal of Chemistry. 2017. Vol. 6. pp. 1–6.
6. Sivrikaya O., Arol A. I. Alternative binders to bentonite for iron ore pelletizing: Part I: Effects on physical and mechanical properties. Holos. 2014. Vol. 3. pp. 94–103.
7. Anand Babu Kotta et al. Characterization of iron ore pellets with dextrin added organic binders under different time and temperature conditions. IOP Conf. Ser.: Mater. Sci. Eng. 2017. Vol. 178. 012003.
8. Anand Babu Kotta, Anshuman Patra, Mithilesh Kumar, Swapan Kumar Karak. Effect of molasses binder on the physical and mechanical properties of iron ore pellets. International Journal of Minerals, Metallurgy and Materials. 2019. Vol. 26. No. 1. pp. 41–51.
9. Halt J. A., Kawatra S. K. Review of organic binders for iron ore concentrate agglomeration. Mining, Metallurgy & Exploration. 2014. Vol. 31. pp. 73–94.
10. Wang C., Xu Cy., Liu Zj. et al. Effect of organic binders on the activation and properties of indurated magnetite pellets. International Journal of Minerals, Metallurgy and Materials. 2021. Vol. 28. pp. 1145–1152.
11. Usoltsev D. Yu. Study of the effect of bentonite-polymer compositions on the properties of iron ore pellets and improvement on this basis of the technology for preparing the charge for their production: Dissertation … of Candidate of Engineering Science. Ekaterinburg. 2007. 165 p.
12. GOST 21043–87. Iron ores and concentrates. Method for determination of external specific surface. Introduced: 01.01.1988.

Language of full-text russian
Full content Buy