2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing

Editors:Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A
Publisher:Flogen Star OUTREACH
Publication Year:2016
Pages:480 pages
ISBN:978-1-987820-46-1
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
CD-SIPS2016_Volume1
CD shopping page

    Experimental investigations into metallurgical properties evolution of Xinjiang lump coal under COREX gasifier condition

    runsheng xu1; Jianliang Zhang2; Zhengjian Liu2; Guangwei Wang2; Kexin Jiao2; Yun Zhou2;
    1, Beijing, China; 2UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, China;
    Type of Paper: Regular
    Id Paper: 38
    Topic: 3

    Abstract:

    The COREX process is the new ironmaking technology which has realized industrialization with lump coal instead of coke to get high-quality hot metal, and reduced the dependence on coking coal resources. So lump coal is the major fuel for COREX process, and the performance of COREX depends on its metallurgical properties. The descending process of Xinjiang lump coal was simulated and the evolution of metallurgical properties during the process was investigated by experiment. The results showed that the thermal stability was getting worse at the temperature of 300-500íŠ. The mechanical strength of lump coal first decreased then became better with the temperature increase, and the most serious chalking interval was under 600-800íŠ condition. Moreover, the reactivity with CO2 decreased with its temperature increase. The metallurgical properties of Xiangjiang lump coal during the descending process depend on its pyrolysis reaction and microstructures evolution.

    References:

    [1] S. Pal and A. k. Lahiri: Mathematical model of COREX melter gasifier: Part I. Steady-state model, Metallurgical and Materials Transactions B, 34(2003), 103 - 114.
    [2] S. Pal and A. k. Lahiri: Mathematical model of COREX melter gasifier: Part II. Dynamic model, Metallurgical and Materials Transactions B, 34(2003), 115 - 119.
    [3] X. Liu, ,G. Pan, G.Wang, Z. Wen: Mathematical Model of Lump Coal Falling in the Freeboard Zone of the COREX Melter Gasifier, Energy & Fuels, 25(2011), 5729-5735.
    [4] H. Zhou, Z. Luo, Z. Zou, T. Zhang, Y. You: Experimental Study on Burden Descending Behavior in COREX Shaft Furnace with AGD Beams, Steel research international, 86 (2015), 1073-1081.
    [5] R. Zhu, J. Zhu, W. Song: Present operation situation and development prospect of Baosteel COREX-3000, Baosteel Technology, (2011), 12-17 (in Chinese).
    [6] C. Wang, Z. Zhou, X. Li: Analysis of operation and improvement approach of COREX-3000, World Iron & Steel, (2012), 44-49 (in Chinese).
    [7] Z. Xue, Q. Zou, H. Xu: Feasibility analysis of Xinjiang's coals as fuel for COREX, Xinjiang Iron and Steel, 130(2014),1-4 (in Chinese)
    [8] P. P. Kumar, D. Gupta, T. K. Naha, S. S. Gupta: Factors affecting fuel rate in Corex process, Ironmaking & Steelmaking, 33(2006), 293-298.
    [9] Y. L. Guo, W. R. Xu, J. M. Zhu, J. Y. Zhang: Influence of operational parameters on hot metal temperature in Corex process, Ironmaking & Steelmaking, 40 (2013), 545-550.
    [10] P. P. Kumar,;A. V. R. P. Dasu,;M. Ranjan,;T. K. Naha: Influence of operational parameters on silicon in hot metal from Corex, Ironmaking & Steelmaking, 35 (2008), 108-114.
    [11] P. P. Kumar, S. C. Barman, B. M. Reddy, V. R. Sekhar: Raw materials for Corex and their influence on furnace performance, Ironmaking & Steelmaking, 36 (2009), 87-90.
    [12] R. Sahoo, D. Roach: Degradation behavior of weathered coal during handling for the COREX process of iron making, Powder Technology , 152,(2005), 1-8.
    [13] R. Sahoo, D. Roach: Quantification of the lump coal breakage during handling operation at the Gladstone port, Chemical Engineering and Processing: Process Intensification, 44 (2005), 797-804.
    [14] B. Kim, S. Gupta, S. Lee, S. Kim, V. Sahajwalla: Devolatilization and Cracking Characteristics of Australian Lumpy Coals, Energy & Fuels, 22 (2008), 514-522.
    [15] S. Zhang, F. Zhu, C. Bai, L. Wen, H. Peng: High temperature pyrolysis behaviour and kinetics of lump coal in COREX melter gasifier, Ironmaking & Steelmaking, 41(2014), 219-228.
    [16] S. Zhang, H. Peng, X. Zhang, W. Liu, L. Wen, G. Qiu: Structure characterization and metallurgical properties of the chars formed by devolatilization of lump coals, Fuel Processing Technology, 129(2015), 174-182.
    [17] Q. P. Campbell, J. R. Bunt, F. de: Waal Investigation of lump coal agglomeration in a non-pressurized reactor. Journal of Analytical and Applied Pyrolysis, 89(2010), 271-277.
    [18] M. Minkina, F. L. G. Oliveira, V. Zymla: Coal lump devolatilization and the resulting char structure and properties, Fuel Processing Technology, 91 (2010), 476-485.
    [19] Z. Fu, Z. Guo, Z. Yuan, Z. Wang: Swelling and shrinkage behavior of raw and processed coals during pyrolysis, Fuel, 86(2007), 418-425.
    [20] M. Knepper, A. Babich, D. Senk: Study on coal and coal briquettes pyrolysis and conversion, Proc. 6th Int. Congress on the Science and Technology of Ironmaking - ICSTI, Rio de Janeiro, Brazil, 2012: 811-821.
    [21] R. Xu, J. Zhang, G. Wang, H. Zuo, P. Li, H. Wang, H. Lin, S. Liu: Isothermal kinetic analysis on fast pyrolysis of lump coal used in COREX process, Journal of Thermal Analysis and Calorimetry, 123(2015), 773-783.
    [22] R. Xu, J. Zhang, G. Wang, H. Zuo, Z. Liu, K. Jiao, Y. Liu, K. Li: Devotilization characteristics and kinetic analysis of lump coal from China Corex under high Temperature, Metallurgical and Materials Transactions B, under revised.
    [23] Y. Bai, Y. Wang, S. Zhu, L. Yan, F. Li, K. Xie: Synergistic effect between CO2 and H2O on reactivity during coal chars gasification. Fuel, 126(2014), 1-7.

    Full Text:

    Click here to access the Full Text

    Cite this article as:

    xu r, Zhang J, Liu Z, Wang G, Jiao K, Zhou Y. Experimental investigations into metallurgical properties evolution of Xinjiang lump coal under COREX gasifier condition. In: Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A, editors. Sustainable Industrial Processing Summit SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing. Volume 6. Montreal(Canada): FLOGEN Star Outreach. 2016. p. 350-361.