Prediction of Blast Furnace Thermal State in Real-Time Operation

Abstract:

The paper gives a general description of the dynamic model of the blast-furnace process that enables to calculate transition processes of the blast furnace thermal state, evaluated by the content of silicon in hot metal. It provides calculation results of the transition processes to be subjected to changes in control actions: ore load from the top and oxygen concentration in blast, natural gas flow rate and hot blast temperature from the bottom. Specific features of these transition processes during blast-furnace smelting are analyzed. The paper shows that the dynamic characteristics of blast furnaces change are subjected to control actions and depend significantly on properties of melted raw materials and operating parameters of blast furnaces. The oscillatory transition process in the blast furnace is observed in the case after disturbance it has an opposite influence on the thermal state of the lower and uppers stages of heat exchange. The paper presents prediction results of the silicon content in hot metal. It gives practical recommendations for selection of control actions.

• Periodical: Solid State Phenomena (Volume 299)
• Pages: 518-523
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.299.518
• Online since: January 2020
• Authors: Nikolay Spirin*, Oleg Onorin, Alexander Istomin
• Keywords: Blast Parameters, Blast-Furnace Smelting, Burden Materials, Dynamic Model, Prediction, Silicon Content in Hot Metal, Transition Process

References

[1] I.G. Tovarovsky, Blast-furnace smelting. Porogi, Dnepropetrovsk, (2009).

[2] M. Geerdes, Modern domain process / M. Geerdes, R. Cheno, I. Kurunov [and others], Moscow, Metallurgizdat, (2016).

[3] V.A. Ulakhovich, E.I. Raykh, V.M. Sholeninov [et al], The dynamic study of blast-furnace process, Steel 1 (1975) 9-14.

[4] L.S. Mkrtchan, A.F. Rebeko, Yu.V. Serov [et al], The dynamic study of blast-furnace process, Steel 11 (1975) 981-986.

[5] D. Bulter, K. Mattheis, Control of the blast-furnace process, Ferrous metals 22 (1970) 3-11.

[6] K. Mattheis, D. Bulter, E. Schurmann, The transition conditions of the blast furnace, Ferrous metals 22 (1974) 31-38.

[7] I.F. Kurunov, V.A. Dobroskok, V.G. Makienko, The influence of blast furnace dimensions and metal tapping number on dynamic characteristics, Issues of automatic control of blast-furnace production: col. Issue 3. Automation Institute, Kiev, 1973, 85-87.

[8] V.I. Moykin, N.M. Babushkin, B.A. Bokovikov, Dynamic characteristics of blast furnace according to the results of mathematical modelling: subject collection of scientific works MChM USSR (IChM) Issues of iron production in blast furnaces. Metallurgy, Moscow, 1984, 46-52.

[9] Xu Jian, Sheng-li Wu, Xin-ying Guo, Kai-ping Du. Numerical simulation on dynamic and static holdups of powder inside pre-reduction shaft furnace: Proc. the 6th Int. congress on the science and technology of ironmaking, Rio de Janeiro, RJ, Brazil. October 14–18 (2012) 414-424.

[10] А.N. Ramm, Modern blast-furnace process, Metallurgy, Moscow, (1980).

[11] T. Yamamoto, T. Shokyu, H. Kanoshima, Y. Hayashi, K. Tamura, T. Takahashi Development of monitoring system for lump and cohesive zones in the blast furnace, Transactions of the Iron and Steel Institute of Japan 22 (1982) 774-781.

DOI: 10.2355/isijinternational1966.22.774

[12] S. Taguchi, H. Kubo, N. Tsuchiya, K. Ichifuji, K. Okabe, Development of a mathematical model of silicon transfer via SiO in the blast furnace, Tetsu-To-Hagane. Journal of the Iron and Steel Institute of Japan 68 (1982) 2303-2310.

DOI: 10.2355/tetsutohagane1955.68.15_2303

[13] M. Hatano, K. Kurita, H. Yamaoka, T. Yokoi, Investigation of blow-in operation through the blast furnace dynamic model, Tetsu-To-Hagane. Journal of the Iron and Steel Institute of Japan 68 (1982) 2369-2376.

DOI: 10.2355/tetsutohagane1955.68.15_2369

[14] Y. Abe, Y. Umezu, T. Fukuda, K. Kubokochi, Development of process data control system in iron-making process, Transactions of the Iron and Steel Institute of Japan 23 (1982).

[15] Yu.N. Ovchinnikov, V.I. Moykin, N.A. Spirin, B.A. Bokovikov, Non-steady processes and improvement of blast-furnace smelting efficiency, Metallurgy, Chelyabinsk, (1989).

[16] B.I. Kitaev, Yu.G. Yaroshenko, E.L. Sukhanov [et al], Heating engineering of blast-furnace process, Metallurgy, Moscow, (1978).

[17] N.А. Spirin, V.V. Lavrov, V.Yu. Rybolovlev [et al], Mathematical Modelling of Metallurgical Processes in ICS, OOO UIPTs, Ekaterinburg, (2014).

[18] O.P. Onorin, N.A. Spirin, V.V. Lavrov, I.E. Kosachenko, V.Yu. Rybolovlev, Assessing the shape of the viscoplastic iron-ore zone in a blast furnace, Steel in Translation, 43 (2013) 335-340.

DOI: 10.3103/s0967091213060132

[19] N.A. Spirin, V.V. Lavrov, V.Y. Rybolovlev, A.V. Krasnobaev, A.V. Pavlov, Use of Contemporary Information Technology for Analyzing the Blast Furnace Process, Metallurgist, 60 (2016) 471-477.

DOI: 10.1007/s11015-016-0317-4

[20] S.V. Emelyanov, S.K. Korovin, L.P. Myshlyaev [et al], Theory and practice of prediction in control systems, Russian Universities Publishing Union: Kuzbassvuzizdat – ASTech, Kemerovo, Мoscow, (2008).

[21] N.A. Spirin, L.Y. Gileva, V.V. Lavrov, Information modeling system for blast furnace control, IOP Conference Series: Materials Science and Engineering, 150 (2016).

DOI: 10.1088/1757-899x/150/1/012011

[22] O.P. Onorin, N.A. Spirin, A.S. Istomin, V.V. Lavrov, A.V. Pavlov, Features of blast furnace transient processes, Metallurgist, 61 (2017) 121-126.

DOI: 10.1007/s11015-017-0464-2