Published June 30, 2020 | Version v1
Journal article Open

FEATURES OF THE PHASE AND STRUCTURAL TRANSFORMATIONS IN THE PROCESSING OF INDUSTRIAL WASTE FROM THE PRODUCTION OF HIGH­ALLOYED STEELS

Creators

  • 1. Donbass Institute of Technique and Management Private Higher Educational Establishment "Academician Yuriy Bugay Internationalscientific and Technical University"
  • 2. Kharkiv Petro Vasylenko National Technical University of Agriculture
  • 3. National University "Zaporizhzhya Polytechnic"
  • 4. National University of Civil Defence of Ukraine
  • 5. Luhansk National Agrarian University
  • 6. National University of Life and Environmental Sciences of Ukraine
  • 7. National Scientific Center "Institute of Mechanization and Electrification of Agriculture"
  • 8. Vinnytsia National Agrarian University

Description

We have investigated the physical and chemical properties of the alloy obtained by reduction smelting using wastes from the production of highly-alloyed steels and alloys. This is necessary to determine the technological aspects that reduce the loss of doping components when obtaining and using a doping alloy. The study results indicate that at the charge's oxygen-to-carbon ratio of 2.25, the alloy consisted mainly of a solid solution of doping elements in γ-Fe. At the charge's oxygen-to-carbon ratio of 1.67, we also observed Fe3C, followed by an increase in the intensity of carbide manifestation at the oxygen-to-carbon ratio of 1.19. Photographs of the microstructure clearly showed several phases with a different ratio of doping elements. The Ni content in the examined sections of various phases changed within 1.38‒46.38 % by weight, Cr ‒ 3.45‒45.32 % by weight, W ‒ 1.51‒27.32 % by weight, Mo ‒ 0.48‒10.38 % by weight. Mo, W, Nb mostly concentrated in individual particles. The Nb content in some inclusions reached 47.62 % by weight. Analysis of the study results has shown that the most beneficial charge's oxygen-to-carbon ratio is 1.67. At the same time, the phase composition is dominated by a solid solution of doping elements in γ-Fe. The proportion of residual carbon, which was in the form of a carbide component, accepted values in the range of 0.52‒2.32 % by weight while providing the necessary reducing capacity when using the alloy. Our research has identified new technological aspects in the processing of highly-alloyed anthropogenic waste when obtaining an alloy with a relatively low residual carbon content. The resulting parameters of the resource-saving doping material ensure the possibility to replace some of the standard ferroalloys when smelting steels with certain carbon content restrictions

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References

  • Maksimov, E. A., Vasil'ev, V. I. (2016). The Utilization of the Wastes of the Rolling and Pipe-Rolling Shops of the Metallurgical Plants and their Processing. Ferrous Metallurgy. Bulletin of Scientific, Technical and Economic Information, 3, 99–107.
  • Grigor'ev, S. M., Petrishchev, A. S. (2012). Assessing the phase and structural features of the scale on P6M5Φ3 and P12M3K5Φ2 steel. Steel in Translation, 42 (3), 272–275. doi: https://doi.org/10.3103/s0967091212030059
  • Demydyk, V. N. (2014). Sustainable development and waste recycling in ferrous metallurgy. Metall i lit'e Ukrainy, 8, 36–40.
  • Petryshchev, A., Milko, D., Borysov, V., Tsymbal, B., Hevko, I., Borysova, S., Semenchuk, A. (2019). Studying the physical­chemical transformations at resource­saving reduction melting of chrome–nickel­containing metallurgical waste. Eastern-European Journal of Enterprise Technologies, 2 (12 (98)), 59–64. doi: https://doi.org/10.15587/1729-4061.2019.160755
  • Hryhoriev, S., Petryshchev, A., Shyshkanova, G., Zaytseva, T., Frydman, O., Krupey, K. et. al. (2018). A study of environmentally friendly recycling of technogenic chromium and nickel containing waste by the method of solid phase extraction. Eastern-European Journal of Enterprise Technologies, 1 (10 (91)), 44–49. doi: https://doi.org/10.15587/1729-4061.2018.121615
  • Mechachti, S, Benchiheub, O., Serrai, S., Shalabi, M. (2013). Preparation of iron Powders by Reduction of Rolling Mill Scale. International Journal of Scientific & Engineering Research, 4 (5), 1467–1472.
  • Hryhoriev, S., Petryshchev, A., Belokon', K., Krupey, K., Yamshinskij, M., Fedorov, G. et. al. (2018). Determining the physical-chemical characteristics of the carbon-thermal reduction of scale of tungsten high-speed steels. Eastern-European Journal of Enterprise Technologies, 2 (6 (92)), 10–15. doi: https://doi.org/10.15587/1729-4061.2018.125988
  • Huang, D. H., Zhang, J. L., Lin, C. C., Mao, R. (2011). Production of ferro-nickel granules from nickel laterite ore/coal composite briquettes by direct reduction. Beijing Keji Daxue Xuebao, 33 (12), 1442–1447.
  • Wang, L., Lü, X., Liu, M., You, Z., Lü, X., Bai, C. (2018). Preparation of ferronickel from nickel laterite via coal-based reduction followed by magnetic separation. International Journal of Minerals, Metallurgy, and Materials, 25 (7), 744–751. doi: https://doi.org/10.1007/s12613-018-1622-7
  • Zhang, Y., Wei, W., Yang, X., Wei, F. (2013). Reduction of Fe and Ni in Fe-Ni-O systems. Journal of Mining and Metallurgy, Section B: Metallurgy, 49 (1), 13–20. doi: https://doi.org/10.2298/jmmb120208038z
  • Zhao, L., Wang, L., Chen, D., Zhao, H., Liu, Y., Qi, T. (2015). Behaviors of vanadium and chromium in coal-based direct reduction of high-chromium vanadium-bearing titanomagnetite concentrates followed by magnetic separation. Transactions of Nonferrous Metals Society of China, 25 (4), 1325–1333. doi: https://doi.org/10.1016/s1003-6326(15)63731-1
  • Ryabchikov, I. V., Belov, B. F., Mizin, V. G. (2014). Reactions of metal oxides with carbon. Steel in Translation, 44 (5), 368–373. doi: https://doi.org/10.3103/s0967091214050118
  • Simonov, V. K., Grishin, A. M. (2013). Thermodynamic analysis and the mechanism of the solid-phase reduction of Cr2O3 with carbon: Part 1. Russian Metallurgy (Metally), 2013 (6), 425–429. doi: https://doi.org/10.1134/s0036029513060153
  • Simonov, V. K., Grishin, A. M. (2013). Thermodynamic analysis and the mechanism of the solid-phase reduction of Cr2O3 with carbon: Part 2. Russian Metallurgy (Metally), 2013 (6), 430–434. doi: https://doi.org/10.1134/s0036029513060165
  • Shveikin, G. P., Kedin, N. A. (2014). Products of carbothermal reduction of tungsten oxides in argon flow. Russian Journal of Inorganic Chemistry, 59 (3), 153–158. doi: https://doi.org/10.1134/s0036023614030206
  • Smirnyagina, N. N., Khaltanova, V. M., Kim, T. B., Milonov, A. S. (2012). Thermodynamic modeling of the formation of borides and carbides of tungsten, synthesis, structure and phase composition of the coatings based on them, formed by electron-beam treatment in vacuum. Izvestiya vysshih uchebnyh zavedeniy. Fizika, 55 (12 (3)), 159–163.
  • Zhu, H., Li, Z., Yang, H., Luo, L. (2013). Carbothermic Reduction of MoO3 for Direct Alloying Process. Journal of Iron and Steel Research International, 20 (10), 51–56. doi: https://doi.org/10.1016/s1006-706x(13)60176-4