ORALS
SESSION:
IronFriAM-R8
| Usui International Symposium on Advanced Sustainable Iron and Steel Making (7th Intl. Symp. on Advanced Sustainable Iron and Steel Making) |
| Fri Oct, 25 2019 / Room: Ambrosia B (77/RF) | |
| Session Chairs: Masaaki Naito; Oleg Ostrovski; Session Monitor: TBA |
11:20: [IronFriAM01] Plenary
Gaseous Reduction of Iron Ore Agglomerates --- Reaction Behavior and Reaction Models Tateo
Usui1 ; Masaaki
Naito
2 ; Hirotoshi
Kawabata
3 ; Hideki
Ono
4 ;
Hirokazu
Konishi3 ; Paulo
Assis
5 ;
1Osaka University, Ibaraki, Japan;
2Nippon Steel Technology Corporation, Futtsu, Japan;
3Osaka University, Suita, Japan;
4University of Toyama, Toyama, Japan;
5UFOP, Ouro Preto, Brazil;
Paper Id: 437
[Abstract] Gaseous reduction behavior of iron oxide pellets and iron ore sinter with CO and H<sub>2</sub> were studied experimentally. In reaction models for gaseous reduction of iron ore agglomerates, the formations of both unreacted-core shrinking (UCS) model for one interface and UCS model for three interfaces and the developments of multi-stage zone-reaction models without and with considering solid-state diffusion are summarized; these models were used mainly for pellets but sometimes used for sinter. UCS model for six interfaces in consideration of quaternary calcium ferrite reduction process was newly developed for sinter. Comparisons of these reaction models for pellets and sinter were carried out by using experimental data on gaseous reduction of these iron ore agglomerates.
References:
1 T. Usui, M. Naito, T. Murayama and Z. Morita: Kinetic Analysis on Gaseous Reduction of Agglomerates, Part 1, Reaction Models for Gaseous Reduction of Agglomerates (in Japanese), Tetsu-to-Hagané, 80 (1994), 431-439.
2 T. Usui, M. Ohmi, M. Naito, H. Kamiya, Y. Oshima and Z. Morita: Kinetic Analyses on the Rate of Gaseous Reduction of Single Particles and Packed Beds of Iron Ore Agglomerates, Proceedings of The Julian Szekely Memorial Symposium on Materials Processing, ed. by H. Y. Sohn, J. W. Evans and D. Apelian, (October, 1997, Boston, Massachusetts, U.S.A.), 67-80, TMS.
3 M. Ohmi, T. Usui, M. Naito and Y. Minamide: Experimental Study of the Resistance Due to the Rate of Gas Flow on the Hydrogen Reduction of an Iron Oxide Pellet, Tetsu-to-Hagané (in Japanese), 67 (1981), 1943-1951; Trans. ISIJ (Transactions of the Iron and Steel Institute of Japan), 23 (1983), 81-89
4 M. Ohmi and T. Usui: Study on the Rate of Reduction of Single Iron Oxide Pellet with Hydrogen (in Japanese), Tetsu-to-Hagané, 59 (1973), 1888-1901; On the Unreacted-core Shrinking Model for Reduction of a Single Hematite Pellet with Hydrogen, Trans. ISIJ, 16 (1976), 77-84.
5 M. Ohmi, M. Naito and T. Usui: Applicability of Three Interface Model to the Analysis of Reduction Rate of Iron Oxide Pellets with Hydrogen, Technology Reports of the Osaka University, 34 (1984), No.1743, 19-27.
6 T. Usui, M. Ohmi and E. Yamamura: Analysis of Rate of Hydrogen Reduction of Porous Wustite Pellets Basing on Zone-reaction Models, Tetsu-to-Hagané (in Japanese), 72 (1986), 1263-1270; ISIJ International, 30 (1990), 347-355.
7 M. Ohmi, M. Naito and T. Usui: Multi-stage Zone-reaction Model for the Gaseous Reduction of Porous Hematite Pellets (in Japanese), Tetsu-to-Hagané, 68 (1982), 592- 601.
8 M. Ohmi and T. Usui: Improved Theory on the Rate of Reduction of Single Particles and Fixed Beds of Iron Oxide Pellets with Hydrogen, Trans. ISIJ, 22 (1982), 66-74.
9 M. Ohmi, M. Naito and T. Usui: Kinetic Analysis of Hydrogen Reduction of Various Hematite Pellets on the Basis of the Multi-stage Zone-reaction Models (in Japanese), Tetsu-to-Hagané, 69 (1983), 546-555.
10 M. Ohmi, M. Naito and T. Usui: Effects of Various Factors on the Reduction Rate of Hematite Pellets with Hydrogen (in Japanese), Tetsu-to-Hagané, 68 (1982), 1503-1512.
11 M. Ohmi, M. Naito and T. Usui: Multi-stage Zone-reaction Model with Solid-state Diffusion for the Hydrogen Reduction of Porous Hematite Pellets (in Japanese), Tetsu-to-Hagané, 69 (1983), 363-370.
12 T. Usui, M. Ohmi, S. Hirashima and N. Kitagawa: Kinetic Analysis on the Rate of Stepwise Reduction of a Single Sinter with CO-CO2-N2 Gas Mixture (in Japanese), Tetsu-to-Hagané, 73 (1987), 1956-1963.
13 T. Usui, M. Ohmi, S. Kaneda, M. Ohmasa and Z. Morita: Re-examination of Method of Kinetic Analysis on the Rate of Stepwise Reduction of a Single Sinter Particle with CO-CO<sub>2</sub>-N<sub>2</sub> Gas Mixture, ISIJ International, 31 (1991), 425-433.
14 T. Usui, M. Ohmi, N. Kitagawa, S. Kaneda, H. Kawabata and Z. Morita: Change of Sinter Minerals and Final Fractional Reduction in the Reduction Stage from Hematite to Magnetite with CO-CO<sub>2</sub>-N<sub>2</sub> Gas Mixture (in Japanese), Tetsu-to-Hagané, 77 (1991), 1251-1258.
15 T. Usui, H. Kawabata, T. Fujimori, I. Fukuda and Z. Morita: Influence of CO Ratio and Reduction Temperature upon the Reducibility of Calcium Ferrite in Sinter in the Initial Stage of Reduction with CO-CO<sub>2</sub>-N<sub>2</sub> Gas Mixture (in Japanese), Tetsu-to-Hagané, 78 (1992), 982-989.
16 H. Ono-Nakazato, Y. Tsubone, Y. Takaki and T. Usui: Measurement of Hydrogen Reduction Rates of FeO in 2FeO.SiO<sub>2</sub> and CaO.FeO.SiO<sub>2</sub> (in Japanese), Tetsu-to-Hagané, 87 (2001), 320-326.
17 T. Usui, Y. Nakamuro, M. Nishi, M. Naito, H. Ono and Paulo S. Assis: Gaseous Reduction Model for Sinter in Consideration of Calcium Ferrite Reaction Process (Unreacted-core Shrinking Model for Six Interfaces), Tetsu-to-Hagané (in Japanese), 100 (2014), 294-301; ISIJ International, 55 (2015), 1617-1624.
18 T. Murayama, T. Usui, M. Naito and Y. Ono: Kinetic Analysis on Gaseous Reduction of Agglomerates, Part 2, Rate Parameters Included in the Mathematical Model for Gaseous Reduction of Agglomerates (in Japanese), Tetsu-to-Hagané, 80 (1994), 493-500.
19 M. Naito, T. Murayama and T. Usui: Kinetic Analysis on Gaseous Reduction of Agglomerates, Part 3, Application of Gaseous Reduction Models for Agglomerates to Blast Furnace Analysis (in Japanese), Tetsu-to-Hagané, 80 (1994), 581-586.
20 T. Usui, H. Konishi, K. Ichikawa, H. Ono, H. Kawabata, Francisco B. Pena, Matheus H. Souza, Alexandre A. Xavier and Paulo S. Assis: Evaluation of Carbonisation Gas from Coal and Woody Biomass and Reduction Rate of Carbon Composite Pellets, Advances in Materials Science and Engineering, Special Issue on Biomass Materials for Metallurgical Applications, Vol. 2018, Article ID 3807609, (2018), pp.1 – 14.
