Physical Modeling of Slag Penetration on the Refractories in a Static Magnetic Field

Ao Huang, Huangzhi Gu, Yongshun Zou, Pengfei Lian, Wenxuan Zhang, Yunke Chen

The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology, Wuhan, Hubei 430081/China

Revision 29.06.2018, 30.07.2018

Volume 10, Issue 4, Pages 79 - 86

Abstract

Alumina based refractory is the important lining material in the process of steelmaking, and slag corrosion is one of the main forms of refractory wear. Electromagnetic feld will affect the interface behaviour between refractories and molten slag because the molten slag has certain conductivity, meanwhile the wettability between refractories and molten slag is an important factor affecting slag corrosion. Therefore, a method of simulation experiment at room temperature was adopted, in which the molten slag was simulated by saturated NaCl solution composite, and alumina and resin materials were selected to simulate refractories in the static magnetic feld, the effect of magnetic fux density on the slag penetration was investigated. The results showed that the effective electromagnetic damping formed in the static magnetic feld, which can prevent the penetration of the molten slag to refractory materials. The higher the magnetic fux density is, the shallower the penetration will be, and the weaker the electrophoretic effect is. Furthermore, the inhibitory effect of slag penetration to the smaller pores is more obvious in the static magnetic feld with same magnetic fux density. It is indicated that a static magnetic feld can effectively regular or control the interface behaviour between refractory and molten slag to prolong the service life of refractories.March 2018

Keywords

static magnetic feld, slag penetration resistance, physical modeling,electromagnetic damping

References

[1] Li, G.; Wang, H.: Electromagnetic process of materials. Jiangsu University Press, 2014 [2] Wang, Q.; et al.: New electromagnetic technology. Science Press, 2015 [3] Mapelli, C.; Baragiola, S.: Development of solidifcation microstructures in continuously cast billets of boron and resulphurised steel grades. Ironmaking & Steelmaking 35 (2008) 441–451 [4] Tsukaguchi, Y.; et al.: Development of swirling fow submerged entry nozzles for slab casting. ISIJ Int. 50 (2010) 721–729 [5] Aneziris, C.G.; Hampel, M.: Microstructured and electro-assisted high-temperature wettability of MgO in contact with a silicate slag based on fayalite. Int. J. of Appl. Ceram. Technol. 5 (2008) 469–479 [6] Khoroshavin, B.; Shcherbatskii. B.: An electronic technology for refractories based on the periodic law. Refractories and Industrial Ceramics 46 (2005) 344–351 [7] Pötschke, J.: Does electrowetting infuence slag infltration? 51st Int. Coll. on Refractories for Metallurgy, Eurogress Aachen, 2008, 144–146 [8] Aneziris, G.; Hampel, M.: Microstructured and electro-assisted high-temperature wettability of MgO in contact with a silicate slag-based on fayalite. Int. J. of Applied Ceram. Technol. 5 (2008) 469–479 [9] Li, X.; Zhu, B.; Wang, T.: Effect of electromagnetic feld on slag corrosion resistance of low carbon MgO-C refractories. Ceramics Int. 38 (2012) 2105–2109 [10] Li, X.; Zhu, B.; Wang, T.: Electromagnetic feld effects on the formation of MgO dense layer in low carbon MgO-C refractories. Ceramics Int. 38 (2012) 2883–2887 [11] Li, S.; Ma, B., Li, H.: Corrosion and penetration behaviors of molten slag on the magnesia calcia refractories under electromagnetic feld. Proc. of the 11 China Iron and Steel Conference, Beijing, 2017, 1127 [12] Lian, P.; et al.: Characteristics and corrosion behavior on refractories of molten slag under electromagnetic feld. Proc. 15 Unifed Int. Technical Conf. on Refractories, Santiago, Chile, 2017, 641–644 [13] Huang, A.; et al.: Modeling and experiment of slag corrosion on the lightweight alumina refractory with static magnetic feld facing green metallurgy. J. of Mining and Metallurgy, Section B: Metallurgy 54 (2018) [2] [14] Yao, J.; et al.: Research on the empirical formula of the line between conductivity and solution concentration function. China Sci. and Technol. Expo 20 (2008) [5–6] [15] Liang, L.; et al.: Electrical conductivity measurement of electroslag using four-probe electrode with AC conductometer. J. of Northeastern Institute of Technology, Natural Sci. Ed. (1985) [3] 74–80 [16] Shen, P.: Study on interfacial phenomenon among steel-slag-lining refractory system. University of Science and Technology Beijing, 2017 [17] Cheng, S.; et al.: Experimental research on effects of magnetic felds on the conductivity of NaCI solutions. High Technol. Letters 20 (2010) 1091–1095 [18] Xi, H.: Physical properties of sodium chloride solution. J. of Tianjin Institute of Light Industry (1997) [2] 72–74

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