Journals →  Obogashchenie Rud →  2022 →  #6 →  Back

SECONDARY RAW MATERIAL PROCESSING
ArticleName A study on the influence of the graphite flakes disintegration method on their dispersed composition, particle shape, and flotation performance
DOI 10.17580/or.2022.06.08
ArticleAuthor Orekhova N. N., Fadeeva N. V., Kolodezhnaya E. V., Efimova Yu. Yu.
ArticleAuthorData

Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia):

Orekhova N. N., Professor, Doctor of Engineering Sciences, Associate Professor, n_orehova@mail.ru
Fadeeva N. V., Associate Professor, Candidate of Engineering Sciences, Associate Professor, natali_fadeeva@mail.ru
Efimova Yu. Yu., Associate Professor, Candidate of Engineering Sciences, jefimova78@mail.ru

Melnikov Institute of Problems of Integrated Development of Mineral Resources of the RAS (Moscow, Russia):

Kolodezhnaya E. V., Leading Researcher, Candidate of Engineering Sciences, kev@uralomega.ru

Abstract

Cast iron cooling generates iron-graphite flakes that may serve as a source of flaked graphite, a valuable material, in high demand by Russian manufacturers. This study was aimed at analyzing the changes in the dispersed composition and shape of iron-graphite flake dust particles when ground under various conditions. The grinding equipment comprised ball mills with metal and porcelain grinding media and a centrifugal impact grinding unit (a vertical shaft mill) with dynamic particle classification. The sieve analysis method and a laser particle size analyzer were used to study dispersion of the initial dust and its grinding products. The material composition and changes in the shapes of flake particles were studied using optical geometry analysis methods and scanning electron microscopy (SEM). Varying distributions of particles by size classes and grain agglomeration probability rates have been established for different grinding methods. The influence of the grinding method on the redistribution of magnetic particles is shown. It has been established that centrifugal milling of graphite flakes intensifies particle aggregation, but also contributes to higher performance in flotation separation as compared to ball milling. The following has been observed for centrifugal milling vs. ball milling: an increase in the yield by 3 %; higher mass fractions of carbon in fine and coarse product flotation concentrates by 22.7 and 17.5 %, respectively; and a 5 times lower concentration of the magnetic fraction.
The work was carried out with the financial support of the Russian Science Foundation as part of a grant for fundamental scientific and exploratory research in 2022–2023, agreement No. 22-27-20068, and with the participation of the TsKL NII «Nanostali» of the NMSU.

keywords Iron-graphite flakes, graphite, particle-size distribution, X-ray spectral microanalysis, material composition, flotation, carbon content, magnetic particles
References

1. Spherical graphite. URL: http://www.sungraf.net/newsshow-133-186-1.html (accessed: 23.11.2022).
2. Yang Z., Wu H., Zhang R., Deng K., Li Y., Liu Z., Zhong Q., Kang Y. Effect of graphene/spherical graphite ratio on the properties of PLA/TPU composites. Polymers. 2022. Vol. 14. DOI: 10.3390/polym14132538.
3. Leonardi M., Alemani M., Straffelini G., Gialanella S. A pin-on-disc study on the dry sliding behavior of a Cu-free friction material containing different types of natural graphite. Wear. 2020. Vol. 442–443. DOI: 10.1016/j.wear.2019.203157.
4. State report on the state and use of mineral resources of the Russian Federation in 2020. Moscow: VIMS, 2021. 572 p.
5. Shu-Lung Kuo. Resourceful and characteristic evaluation of kish graphite in steel mill desulfurization slag. Journal of the Chinese Institute of Engineers. 2022. Vol. 45, Iss. 7. pp. 644–650.
6. Shu-Lung Kuo, Edward Ming-Yang Wu. Analysis on certain physical and resourceful properties of kish graphite containing materials. Journal of the Indian Chemical Society. 2020. Vol. 97, No. 11b. pp. 2490–2494.
7. Fadeeva N. V., Orekhova N. N., Gorlova O. E. Ecological, economic and resource aspects of processing graphitecontaining dust of metallurgical production. Modern problems and prospects of development of science, technology and education. Materials of the I National scientific and practical conference. Magnitogorsk: NMSTU, 2020. pp. 1229–1232.
8. Fadeeva N. V., Orekhova N. N., Gorlova O. E. Experience of processing graphite-containing dust of metallurgical production. Chernaya Metallurgiya. Byulleten' Nauchnotekhnicheskoy i Ekonomicheskoy Informatsii. 2019. Vol. 75, No. 5. pp. 632–639.
9. Li J., Liu R., Ma L., Wei L., Cao L., Shen W., Kang F., Huang Zh.-H. Combining multiple methods for recycling of kish graphite from steelmaking slags and oil sorption performance of kish-based expanded graphite. ACS Omega. 2021. Vol. 6, Iss. 14. pp. 9868–9875.
10. Eigeles M. A. Beneficiation of non-metallic minerals. Moscow: Promstroyizdat, 1952. 563 p.
11. Nazarenko L. N., Buzunova T. A., Shikhov N. V. Peculiarities of beneficiation of graphite ores of the Topolikha section of the Soyuznoye deposit in order to obtain a largeflake concentrate. Proc. of the XXI International scientific and technical conference «Scientific foundations and practice of processing ores and man-made raw materials». Ekaterinburg: Fort Dialog-Iset', 2016. pp. 37–41.
12. Chizhevsky V. B., Fadeeva N. V. Study of the action of the RAS foamer during graphite flotation. Vestnik NMSTU. 2003. No. 4. pp. 37–41.
13. Gilmanshina T. R., Illarionov I. E., Koroleva G. A., Lytkina S. I. Grindability research for natural cryptocrystalline graphites. Obogashchenie Rud. 2018. No. 4. pp. 6–10. DOI: 10.17580/or.2018.04.02.
14. Aman S., Aman A., Hintz W., Trüe M., Veit P., Hirsch S. The exfoliation of graphite particles in the vibratory disk mill. Chemie–Ingenieur–Technik. 2017. Vol. 89, Iss. 9. pp. 1185–1191.

15. Fadeeva N. V., Orekhova N. N., Gorlova O. E. Study of the features of the material composition and technological properties of metallurgical graphite-containing dust for the production of flake graphite. Aktualnye Problemy Gornogo Dela. 2021. No. 3. pp. 20–27.
16. Ohzeki K., Saito Y., Golman B., Shinohara K. Shape modification of graphite particles by rotational impact blending. Carbon. 2005. Vol. 43, Iss. 8. pp. 1673-1679.
17. Wang X., Gai G.-Sh., Yang Y.-F., Shen W.-C. Preparation of natural microcrystalline graphite with high sphericity and narrow size distribution. Powder Technology. 2008. Vol. 181, Iss. 1. pp. 51–56.
18. Analysis of particle size distribution. URL: https://www.microtrac.com/ru/knowledge/page-particle-sizedistribution/ (accessed: 15.11.2022).
19. Bodryaga V. V., Nedopekin F. V., Belousov V. V. Ecological problem of utilization of kish graphite during cast iron overflows. Security in the technosphere: a collection of articles. Izhevsk: Institute of Computer Research, 2018. pp. 154–163.

Language of full-text russian
Full content Buy
Back