For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Experimental Determination of the Main Parameters of the Refining Process of Rough Ferronickel, Obtained by Iron-Chromium-Nickel Selective Reduction
p.250
Laboratory Assessment of the Technogenic Raw Materials Briquettes Effect on the Arc Furnace Electric Mode
p.256
Impact of Initial Titanium Magnetite Ore Material Composition on Fluxed Pellet Metallurgical Properties
p.262
Technology and Equipment for Sintering of Iron-Ore Materials by Adding Brown Iron Ores as Pulp during Sinter Mix Pelletizing at Ural Steel, JSC
p.267
Analysis of the Granulometric Composition of the Feedstock Influence on Mechanical Properties of Iron Ore Pellets
p.272
Features of Casting Magnesium Alloys in Chill Mold
p.287
The Effect of Cooling Rate on Structure, Basic Mechanical and Special Properties of Complex Alloyed Manganese Cast Iron
p.292
Development and Introduction of a New Composition of Wear-Resistant Cast Iron with Improved Performance Properties for Castings of Pump Parts
p.304
On the Issue of Casting Copper Alloys in Chill Mold
p.313

Analysis of the Granulometric Composition of the Feedstock Influence on Mechanical Properties of Iron Ore Pellets

Article Preview

Abstract:

The paper investigates the effect of high-temperature roasting and cooling modes of roasted iron ore pellets on their strength and porosity. These characteristics depend on the initial iron ore raw materials properties, the parameters of the raw pellets, the firing temperature, the holding time at this temperature, the heating and cooling rate, and take into account the change in these indicators in connection with the chemical and mineralogical compositions of the pellets. It has been established that the strength of iron ore pellets obtained at the optimum firing temperature depends on the characteristics of the initial finely dispersed iron ore raw material. The relationship between the content of draw rock and the strength of calcined pellets has been revealed. A significant influence of the raw pellets porosity on the strength of the calcined pellets was found. It is shown that the crushing strength of pellets cooled in air is higher than the strength of pellets cooled with water, and a decrease in the final cooling temperature leads to an increase in the strength of the pellets. It is substantiated that the heating rate should not exceed the rate of gas diffusion, and with a decrease in the size of finely dispersed iron ore raw materials, the shrinkage of the pellet layer increases during heating. It is shown that shrinkage appears at temperatures lower than the optimal calcining temperature and insignificantly affects the strength of the pellets. The results obtained can be used to substantiate resource-and-energy efficient operating modes of horizontal-grate machines in ferrous metallurgy.

You might also be interested in these eBooks
Materials Science and Metallurgical Technology III View Preview

Info:

Periodical:

Materials Science Forum (Volume 1052)

Pages:

272-283

DOI:

https://doi.org/10.4028/p-2r8x9q

Citation:

Cite this paper

Online since:

February 2022

Authors:

Vladimir I. Bobkov, Elvira V. Morgunova*

Keywords:

Ferrous Metallurgy, Horizontal-Grate Machine, Iron Ore Pellets

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2022 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

References

[1] L.I. Leontyev, K.V. Grigorovich, M.V. Kostina, Fundamental research as a base of creating new materials and technologies in the fieild of metallurgy. Part 1, Institution news, Ferrous Metallurgy. 61(1) (2018) 11-22.

Google Scholar

[2] I.A. Gurin, V.V. Lavrov, N.A. Spirin, A.G. Nikitin, Web technologies for building information-modeling systems for technological processes in metallurgy, higher education news, Ferrous Metallurgy. 60(7) (2017) 573-579.

DOI: 10.17073/0368-0797-2017-7-573-579

Google Scholar

[3] D. Nayak, N. Ray, N. Dash, S. Pati, P.S. De, Induration aspects of low-grade ilmenite pellets: Optimization of oxidation parameters and characterization for direct reduction application, Powder Technology. 380 (2021) 408-420.

DOI: 10.1016/j.powtec.2020.11.018

Google Scholar

[4] V.V. Bragin, B.A. Bokovikov, M.I. Naidich, A.I. Gruzdev, V.S. Shvydkii, Relation between the productivity and fuel consumption in roasting machines, Steel. 44(8) (2014) 590-594.

DOI: 10.3103/s0967091214080051

Google Scholar

[5] S. Wang, Y. Guo, F. Zheng, F. Chen, L. Yang, Improvement of roasting and metallurgical properties of fluorine-bearing iron concentrate pellets, Powder Technology. 376 (2020) 126-135.

DOI: 10.1016/j.powtec.2020.08.004

Google Scholar

[6] B.A. Bokovikov, V.V. Bragin, V.S. Shvydkii, About the role of the zone of thermal inertia during the heat pellets processing in conveyor indurating machines, Steel. 8 (2014) 43-48.

DOI: 10.3103/s096709121408004x

Google Scholar

[7] J. Li, H.-F. An, W.-X. Liu, A.-M. Yang, M.-S. Chu, Effect of basicity on metallurgical properties of magnesium fluxed pellets, Journal of Iron and Steel Research International. 27(3) (2020) 239-247.

DOI: 10.1007/s42243-019-00307-w

Google Scholar

[8] H. Tian, J. Pan, D. Zhu, D. Wang, Y. Xue, Utilization of ground sinter feed for oxidized pellet production and its effect on pellet consolidation and metallurgical properties, in: Minerals, Metals and Materials Series, 11th International Symposium on High-Temperature Metallurgical Processing, 2020, pp.857-866.

DOI: 10.1007/978-3-030-36540-0_76

Google Scholar

[9] V.I. Bobkov, V.V. Borisov, M.I. Dli, V.P. Meshalkin, Multicriterial optimization of the energy efficiency of the thermal preparation of raw materials, Theoretical Foundations of Chemical Engineering. 49(6) (2015) 842-846.

DOI: 10.1134/s0040579515060020

Google Scholar

[10] V.P. Meshalkin, S.M. Khodchenko, V.I. Bobkov, M.I. Dli, Computer modeling of the chemical-power engineering process of roasting of a moving multilayer mass of phosphorite pellets, Doklady Chemistry. 477(2) (2017) 282-285.

DOI: 10.1134/s0012500817120023

Google Scholar

[11] V.P. Meshalkin, S.M. Khodchenko, V.I. Bobkov, M.I. Dli, Computer-aided modeling of the chemical process of drying of a moving dense multilayer mass of phosphorite pellets, Doklady Chemistry. 475(2) (2017) 188-191.

DOI: 10.1134/s0012500817080031

Google Scholar

[12] S.V. Pancnehko, V.I. Bobkov, A.S. Fedulov, M.V. Chernovalova, Mathematical modelling of thermal and physical-chemical processes during sintering, Non-Ferrous Metals. 45(2) (2018) 50-55.

DOI: 10.17580/nfm.2018.02.09

Google Scholar

[13] V.I. Bobkov, A.S. Fedulov, M.I. Dli, V.P. Meshalkin, Studying the chemical and energy engineering process of the strengthening calcination of phosphorite pellets containing free carbon, Theoretical Foundations of Chemical Engineering. 52(4) (2018) 525-532.

DOI: 10.1134/s0040579518030041

Google Scholar

[14] Y. Tian, G. Qin, Y. Zhang, L. Zhao, T. Yang, Experimental research on pellet production with boron-containing concentrate, Characterization of Minerals, Metals, and Materials, (2020).

DOI: 10.1007/978-3-030-36628-5_9

Google Scholar

[15] Y.G. Yaroshenko, Thermal physics as the basis for energy and resource conservation in steelmaking, Steel in Translation. 47(8) (2017) 505-516.

DOI: 10.3103/s0967091217080150

Google Scholar

[16] S.T. Matkarimov, B.T. Berdiyarov, A.A. Yusupkhodjayev, Technological parameters of the process of producing metallized iron concentrates from poor raw material, International Journal of Innovative Technology and Exploring Engineering. 8(11) (2019) 600-603.

Google Scholar

[17] V.I. Bobkov, V.V. Borisov, M.I. Dli, V.P. Meshalkin, Intensive Technologies for Drying a Lump Material in a Dense Bed, Theoretical Foundations of Chemical Engineering. 51(1) (2017) 70-75.

DOI: 10.1134/s0040579517010031

Google Scholar

[18] B.A. Bokovikov, V.V. Bragin, V.S. Shvydkii, Role of the thermal-inertia zone in conveyer roasting machines, Steel. 44 (8) (2014) 595-601.

DOI: 10.3103/s096709121408004x

Google Scholar

[19] A.A. Akberdin, A.S. Kim, R.B. Sultangaziev, Planning of numerical and physical experiment in the simulation of technological processes, Institution News, Ferrous Metallurgy. 61(9) (2018) 737-742.

DOI: 10.17073/0368-0797-2019-9-737-742

Google Scholar

[20] V.S. Shvydkii, A.R. Fakhtudinov, E.A. Devyatykh, N.A. Spirin, To the mathematical modeling of layered metallurgical furnaces and units, Institution News, Ferrous Metallurgy. 60(1) (2018) 19-23.

DOI: 10.17073/0368-0797-2017-1-19-23

Google Scholar

[21] B.P. Yuryev, V.A. Goltsev, Change in the equivalent porosity of the pellet bed along the length of the indurating machine, Institution News, Ferrous Metallurgy. 60(2) (2018)116-123.

Google Scholar

[22] V.S. Shvydkii, Yu.G. Yaroshenko, N.A. Spirin, V.V. Lavrov, Mathematical model of roasting process of ore and coal pellets in a indurating machine, Institution news, Ferrous Metallurgy. 60(4) (2018) 329-335.

DOI: 10.17073/0368-0797-2017-4-329-335

Google Scholar

[23] A.V. Novichikhin, A.V. Shorokhova, Control procedures for the step-by-step processing of iron ore mining waste, Institution News, Ferrous Metallurgy. 60(7) (2018) 565-572.

DOI: 10.17073/0368-0797-2017-7-565-572

Google Scholar

[24] C.-C. Yang, D.-Q. Zhu, J. Pan, B.-Z. Zhou, H. Xun, Oxidation and induration characteristics of pellets made from western australian ultrafine magnetite concentrates and its utilization strategy, Journal of Iron and Steel Research International. 23(9) (2017) 924-932.

DOI: 10.1016/s1006-706x(16)30140-6

Google Scholar

[25] F.M. Zhuravlev, V.P. Lyalyuk, A.K. Tarakanov, E.V. Chuprinov, D.A. Kassim, Metallurgical characteristics of unfluxed pellets produced from concentrates with different mineral content, Steel in Translation. 46(6) (2016) 419-427.

DOI: 10.3103/s0967091216060139

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.