Dripping and evolution behavior of primary slag bearing TiO<sub>2</sub> through the coke packed bed in a blast-furnace hearth

Yan-xiang Liu; Jian-liang Zhang; Zhi-yu Wang; Ke-xin Jiao; Guo-hua Zhang; Kuo-chih Chou

doi:10.1007/s12613-017-1387-4

Volume 24 Issue 2

Feb. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(2): 130-138

Yan-xiang Liu, Jian-liang Zhang, Zhi-yu Wang, Ke-xin Jiao, Guo-hua Zhang, and Kuo-chih Chou, Dripping and evolution behavior of primary slag bearing TiO₂ through the coke packed bed in a blast-furnace hearth, Int. J. Miner. Metall. Mater., 24(2017), No. 2, pp. 130-138. https://doi.org/10.1007/s12613-017-1387-4

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Yan-xiang Liu, Jian-liang Zhang, Zhi-yu Wang, Ke-xin Jiao, Guo-hua Zhang, and Kuo-chih Chou, Dripping and evolution behavior of primary slag bearing TiO2 through the coke packed bed in a blast-furnace hearth, Int. J. Miner. Metall. Mater., 24(2017), No. 2, pp. 130-138. https://doi.org/10.1007/s12613-017-1387-4

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Research Article

Dripping and evolution behavior of primary slag bearing TiO₂ through the coke packed bed in a blast-furnace hearth

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Corresponding author:
Ke-xin Jiao E-mail: jiaokexin_ustb@126.com
Received: 25 July 2016; Revised: 13 September 2016; Accepted: 22 October 2016

Abstract

Abstract

To investigate the flow of primary slag bearing TiO₂ in the cohesive zone of blast furnaces,experiments were carried out based on the laboratory-scale packed bed systems.It is concluded that the initial temperature of slag dripping increases with decreasing FeO content and increasing TiO₂ content.The slag holdup decreases when the FeO content is in the range of 5wt%-10wt%,whereas it increases when the FeO content exceeds 10wt%.Meanwhile,the slag holdup decreases when the TiO₂ content increases from 5wt% to 10wt% but increases when the TiO₂ content exceeds 10wt%.Moreover,slag/coke interface analysis shows that the reaction between FeO and TiO₂ occurs between the slag and the coke.The slag/coke interface is divided into three layers:slag layer,iron-rich layer,and coke layer.TiO₂ in the slag is reduced by carbon,and the generated Ti diffuses into iron.
- blast furnace slag;
- titanium dioxide;
- packed beds;
- dripping

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References

[1]	X.L. Wang, Ferrous Metallurgy (Ironmaking), The Metallurgy Industry Press, Beijing, 2000.
[2]	M.W. Chapman, B.J. Monaghan, S.A. Nightingale, J.G. Mathieson, and R.J. Nightingale, The effect of sulfur concentration in liquid iron on mineral layer formation during coke dissolution, Metall. Mater. Trans. B, 42(2011), No. 4, p. 642.
[3]	A.K. Biswas, Principles of Blast Furnace Ironmaking:Theory and Practice, Cootha Publishing House, Brisbane, 1981.
[4]	H.L. Shulman, C.F. Ullrich, and N. Wells, Performance of packed columns:I. Total, static, and operating holdups, AlChE J., 1(1955), No. 2, p. 247.
[5]	S.J. Chew, G.X. Wang, A.B. Yu, and P. Zulli, Experimental study of liquid flow in blast furnace cohesive zone, Ironmaking Steelmaking, 24(1997), No. 5, p. 392.
[6]	S.J. Chew, P. Zulli, and A.B. Yu, Modelling of liquid flow in the blast furnace:theoretical analysis of the effects of gas, liquid and packing properties, ISIJ Int., 41(2001), No. 10, p. 1112.
[7]	H. Kawabata, Z. Liu, F. Fujita, and T. Usui, Characteristics of liquid hold-ups in a soaked and unsoaked fixed bed, ISIJ Int., 45(2005), No. 10, p. 1466.
[8]	H. Kawabata, K. Shinmyou, T. Harada, and T. Usui, Influence of channeling factor on liquid hold-ups in an initially unsoaked bed, ISIJ Int., 45(2005), No. 10, p. 1474.
[9]	K. Saito, K.I. Ohno, T. Miki, Y. Sasaki, and M. Hino, Behavior of ironmaking slag permeation to carbonaceous material layer, ISIJ Int., 46(2006), No. 12, p. 1783.
[10]	G.S. Gupta and K. Naveen, Quantification of liquid holdup in the dropping zone of a blast furnace:a cold model study, Metall. Mater. Trans. B, 38(2007), No. 2, p. 203.
[11]	Y. Bando, S. Hayashi, A. Matsubara, and M. Nakamura, Effects of packed structure and liquid properties on liquid flow behavior in lower part of blast furnace, ISIJ Int., 45(2005), No. 10, p. 1461.
[12]	W.M. Husslage, T. Bakker, A.G.S. Steeghs, M.A. Reuter, and R.H. Heerema, Flow of molten slag and iron at 1500℃ to 1600℃ through packed coke beds, Metall. Mater. Trans. B, 36(2005), No. 6, p. 765.
[13]	Y.L. Cao, Y.W. Dong, Z.H. Jiang, H.B. Cao, D. Hou, and Q.L. Feng, Research on droplet formation and dripping behavior during the electroslag remelting process, Int. J. Miner. Metall. Mater., 23(2016), No. 4, p. 399.
[14]	H.L. George, R. Longbottom, S. Chew, D. Pinson, and B. Monaghan, Characterisation of coke packed beds after liquid slag flow at 1500℃ by image analysis, ISIJ Int., 54(2014), No. 8, p. 1790.
[15]	M. Shin, J.S. Oh, and J. Lee, Carburization, melting and dripping of iron through coke bed, ISIJ Int., 55(2015), No. 10, p. 2056.
[16]	D. Jang, M. Shin, J.S. Oh, H.S. Kim, S.H. Yi, and J. Lee, Static holdup of liquid slag in carbonaceous beds, ISIJ Int., 54(2014), No. 6, p. 1251.
[17]	S. Natsui, T. Kikuchi, R.O. Suzuki, T. Kon, S. Ueda, and H. Nogami, Characterization of liquid trickle flow in poor-wetting packed bed, ISIJ Int., 55(2015), No. 6, p. 1259.
[18]	J.R. Kim, Y.S. Lee, D.J. Min, S.M. Jung, and S.H. Yi, Influence of MgO and Al₂O₃ contents on viscosity of blast furnace type slags containing FeO, ISIJ Int., 44(2004), No. 8, p. 1291.
[19]	Y.S. Lee, D.J. Min, S.M. Jung, and S.H. Yi, Influence of basicity and FeO content on viscosity of blast furnace type slags containing FeO, ISIJ Int., 44(2004), No. 8, p. 1283.
[20]	P.A. Tanskanen, S.M. Huttunen, P.H. Mannila, and J.J. Härkki, Experimental simulations of primary slag formation in blast furnace, Ironmaking Steelmaking, 29(2002), No. 4, p. 281.
[21]	H. Park, J.H. Park, G.H. Kim, and I. Sohn, Effect of TiO₂ on the viscosity and slag structure in blast furnace type slags, Steel Res. Int., 83(2012), No. 2, p. 150.
[22]	C. Feng, M.S. Chu, J. Tang, J. Qin, F. Li, and Z.G. Liu, Effects of MgO and TiO₂ on the viscous behaviors and phase compositions of titanium-bearing slag, Int. J. Miner. Metall. Mater., 23(2016), No. 8, p. 868.
[23]	G.H. Zhang, Y.L. Zhen, and K.C. Chou, Influence of TiC on the viscosity of CaO-MgO-Al₂O₃-SiO₂-TiC suspension system, ISIJ Int., 55(2015), No. 5, p. 922.
[24]	Y.L. Zhen, G.H. Zhang, and K.C. Chou, Viscosity of CaO-MgO-Al₂O₃-SiO₂-TiO₂ melts containing TiC particles, Metall. Mater. Trans. B, 46(2015), No. 1, p. 155.
[25]	K.X. Jiao, J.L. Zhang, Z.J. Liu, M. Xu, and F. Liu, Formation mechanism of the protective layer in a blast furnace hearth, Int. J. Miner. Metall. Mater., 22(2015), No. 10, p. 1017.
[26]	W. Zhao, M.S. Chu, H.T. Wang, Z.G. Liu, and Y.T. Tang, Novel blast furnace operation process involving charging with low-titanium vanadium-titanium magnetite carbon composite hot briquette, Int. J. Miner. Metall. Mater., 23(2016), No. 5, p. 501.
[27]	M.W. Chapman, B.J. Monaghan, S.A. Nightingale, J.G. Mathieson, and R.J. Nightingale, Observations of the mineral matter material present at the coke/iron interface during coke dissolution into iron, ISIJ Int., 47(2007), No. 7, p. 973.
[28]	B.J. Monaghan, M.W. Chapman, and S.A. Nightingale, Carbon transfer in the lower zone of a blast furnace, Steel Res. Int., 81(2010), No. 10, p. 829.
[29]	S.S. Gornostayev, T.M.J. Fabritius, O. Kerkkonen, and J.J. Härkki, Fe-Si droplets associated with graphite on blast furnace coke, Int. J. Miner. Metall. Mater., 19(2012), No. 6, p. 478.
[30]	K.J. Li, J.L. Zhang, Z.J. Liu, M. Barati, J.B. Zhong, M.F. Wei, G.W. Wang, K.X. Jiao, and T.J. Yang, Interfaces between coke, slag, and metal in the tuyere level of a blast furnace, Metall. Mater. Trans. B, 46(2015), No. 3, p. 1104.