Influence of Type and Consumption of Pellets on Indicators of Blast-Furnace Smelting in the JSC Ural Steel

Abstract:

The article presents the results of the analysis of production data on the operation of the blast furnace No. 1 of Ural Steel JSC for the period from 2013 to 2018. During this period, the Mikhailovsky GOK pellets with different basicities were used. It has been established, that the effectiveness of the use of pellets of different basicities is determined by their behavior in a blast furnace and depends on the proportion of pellets in the iron ore part of the charge. The gas-dynamic conditions of melting deteriorate with an increase in the proportion of pellets in the charge, which is accompanied by an increase in the specific pressure drop and forces the blast rate, to be adjusted. It is necessary to work on 40-45% of fluxed pellets and 20-25% acid pellets in a charge at a blast rate of 2000-2100 m3/min, to minimize coke rate and increase rate of work of blast furnace No. 1 of Ural Steel JSC. An increase in pellet consumption is possible while maintaining the efficiency of blast-furnace smelting only if their high-temperature properties are improved, as a result of optimization of basicity and increase in MgO content, which affects the structure and properties of the silicate binder.

• Periodical: Solid State Phenomena (Volume 316)
• Pages: 443-448
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.316.443
• Online since: April 2021
• Authors: Roman R. Dema*, Aleksey N. Shapovalov, Aleksandr A. Kal'chenko
• Keywords: Blast Rate, Blast-Furnace Smelting, Fluxed Pellets, Non-Fluxed Pellets, Pellets Consumption, Pressure Drop, Productivity

References

[1] Yu.S. Yusfin, N.F. Pashkov, Metallurgy of iron: tutorial for institutions of higher education, third ed., IKTs Akademkniga, Moscow, 2004 (In Russian).

[2] L. Lu, J. Pan, D. Zhu, 16: Quality requirements of iron ore for iron production, in: Iron Ore: Mineralogy, Processing and Environmental Sustainability, Woodhead Publishing, 2015, pp.475-504.

DOI: 10.1016/b978-1-78242-156-6.00016-2

[3] A. Babich, D Senk, 17: Recent developments in blast furnace iron-making technology in: Iron Ore: Mineralogy, Processing and Environmental Sustainability, Woodhead Publishing, 2015, pp.505-547.

DOI: 10.1016/b978-1-78242-156-6.00017-4

[4] V.I. Korotich, Yu.A. Frolov, G.N. Bezdezhskiy, Agglomeration of ore materials, Ural State Technical University, Ekaterinburg, 2003 (In Russian).

[5] A.N. Dmitriev, G.Yu. Vitkina, Yu.A. Chesnokov, R.V. Petukhov, Iron Ore Materials and Coke Quality Characteristics and Quantitative Indicators of Blast Furnace Smelting, IFAC Proceedings Volumes, 46(16) (2013) 307-311.

DOI: 10.3182/20130825-4-us-2038.00025

[6] G. Gustafsson, H.-Å. Häggblad, P. Jonsén, P. Marklund, Determination of bulk properties and fracture data for iron ore pellets using instrumented confined compression experiments, Powder Technol. 241 (2013) 19-27.

DOI: 10.1016/j.powtec.2013.02.030

[7] J. Mróz, Non‐isothermal reduction as a method of determining the softening – melting temperature of iron‐ore pellets and sinters, Steel Research, 69(12) (1998) 465-468.

DOI: 10.1002/srin.199805581

[8] Sh. Wu, X. Liu, Q. Zhou, J. Xu, Ch. Liu, Low Temperature Reduction Degradation Characteristics of Sinter, Pellet and Lump Ore, J. Iron Steel Res. Int. 18(8) (2011) 20-24.

DOI: 10.1016/s1006-706x(11)60098-8

[9] A. Kemppainen, T. Fabritius, T. Paananen, O. Mattila, E. Pisilä, M. Kondrakov, Effect of adding limestone on the metallurgical properties of iron ore pellets, Int. J. Miner. Process. 141 (2015) 34-43.

DOI: 10.1016/j.minpro.2015.06.004

[10] S. Dwarapudi, C. Sekhar, I. Paul, Y. G. S. Prasad, K. Modi and U. Chakraborty, Effect of fluxing agents on reduction degradation behaviour of hematite pellets, Ironmak. Steelmak. 43(3) (2015) 180-191.

DOI: 10.1179/1743281215y.0000000030

[11] L. Yi, Zh. Huang, T. Jiang, R. Zhong, Zh. Liang, Iron ore pellet disintegration mechanism in simulated shaft furnace conditions, Powder Technol. 317 (2017) 89-94.

DOI: 10.1016/j.powtec.2017.04.056

[12] T. Umadevi, A. Kumar, P. Karthik, R. Srinidhi, M. Sambandam, Characterisation studies on swelling behaviour of iron ore pellets, Ironmak. Steelmak. 45(2) (2018) 157-165.

DOI: 10.1080/03019233.2016.1250043

[13] S.K. Sibagatullin, T.V. Maiorova, The increase in gas flow in a blast furnace with an increase in the total pressure drop in height. Vestnik of Nosov Magnitogorsk State Technical University, 33(1) (2011) 14-16 (In Russian).

DOI: 10.18503/1995-2732-2017-15-1-37-44

[14] E.V. Ovchinnikova, A.N. Shapovalov, The influence of the parameters of the blast mode on the efficiency of blast furnace smelting in the conditions of JSC Ural Steel. Bulletin of the South Ural State University. Series: Metallurgy, 13(1) (2013) 61-67 (In Russian).

DOI: 10.14529/met170403

[15] Zh. Li, Sh. Kuang, S. Liu et al. Numerical investigation of burden distribution in ironmaking blast furnace. Powder Technol. (353) 2019 385-397.

DOI: 10.1016/j.powtec.2019.05.047

[16] Q. Gao, F. Shen, G. Wei et al. Effects of MgO Containing Additive on Low-Temperature Metallurgical Properties of Oxidized Pellet. J. Iron Steel Res. Int. 20(7) (2013) 25-28.

DOI: 10.1016/s1006-706x(13)60121-1

[17] F. Shen, Q. Gao, X. Jiang et al. Effect of magnesia on the compressive strength of pellets. Int. J. Min. Met. Mater. 21(5) (2014) 431-437.

[18] G.L. Qing, C.D. Wang, E.J. Hou et al. Compressive strength and metallurgical property of low silicon magnesium pellet, J. Iron Steel Res. Int. 26(4) (2014) 7–12.

[19] J. Pal, C. Arunkumar, Y. Rajshekhar, Development on iron ore pelletization using calcined lime and MgO combined flux replacing limestone and bentonite, ISIJ Int. 54(10) (2014) 2169-2178.

DOI: 10.2355/isijinternational.54.2169

[20] E.V. Ovchinnikova, V.B. Gorbunov, A.N. Shapovalov et al. Magnesia Sinter with Flux Based on Magnesium Silicat,. Steel in Translation, 48(1) (2018) 34-38.

DOI: 10.3103/s0967091218010126

[21] A.N. Shapovalov, E.V. Ovchinnikova, N.A. Maistrenko, Effect of the type of magnesia materials on the sintering process indicators at JSC Ural Steel, Chernye Metally, (11) 2018 38-42.

[22] A.N. Shapovalov, E.V. Ovchinnikova, V.B. Gorbunov et al. The effect of the composition of magnesia flux on the sinter structure and properties, IOP Conference Series: Materials Science and Engineering 625 (2019) 012009.

DOI: 10.1088/1757-899x/625/1/012009

[23] A.N. Shapovalov, E.V. Ovchinnikova, V.B. Gorbunov, Use of magnesian fluxes of the Khalilovo deposit in sinter production, Izvestiya Ferrous Metallurgy, 62(7) (2019) 548-556 (In Russian).

DOI: 10.17073/0368-0797-2019-7-548-556

[24] R. Wang, J. Zhang, Zh. Liu et al. Interaction between iron ore and magnesium additives during induration process of pellets, Powder Technol. (36) 2020 894-902.

DOI: 10.1016/j.powtec.2019.11.006