Theoretical Analysis and Experiment of Liquid Metal Penetration into Slot Plug Applied for Refining Ladles

Cheng, Zhiheng; Zhu, Miaoyong

doi:10.1007/s11663-014-0093-0

Cited by 15 publications

(4 citation statements)

References 16 publications

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“…The geometrical deformation of the slits caused by thermal expansion and creep could also promote the infiltration of the liquid metal. As explained by Cheng and Zhu [34], when the molten steel contacts with the refractory surface, an adhesive force appears between melt and refractory, which prevents the molten steel from spreading along the refractory slit wall; a cohesive force of liquid metal will prevent the surface of liquid metal from tearing. Consequently, the molten steel in the slit can form a liquid film on the gas-liquid interface to withstand a certain amount of static pressure.…”

Section: Thermomechanical Resultsmentioning

confidence: 99%

Numerical study of creep effect on purging plug performance under cyclic service

Tan

Jin

et al. 2022

J. Iron Steel Res. Int.

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The service life of the purging plug is one of the fundamental factors that determine the downtime and usage efficiency of the whole ladle. The creep behaviour of the purging plug was thus investigated to identify the possible failure mechanism. At first, the creep parameters of the Norton–Bailey strain hardening rule were inversely identified via the results of the creep test. Then, the thermal-solid coupling model approach was employed to predict the creep behaviour of the purging plug, in which the Norton–Bailey strain hardening rule was applied. The numerical results show that the temperature of the purging plug presents a cyclic trend after the first service period since the preheating temperature is lower than the temperature of molten steel. Furthermore, the distribution of the creep strain intensity in a layered form could also contribute to a gradual spalling of the purging plug end in service. Besides, the creep strain concentration around the slit can be responsible for the clogging of the purging plug.

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Section: Thermomechanical Resultsmentioning

confidence: 99%

Numerical study of creep effect on purging plug performance under cyclic service

Tan

Jin

et al. 2022

J. Iron Steel Res. Int.

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“…Lots of previous studies [8][9][10][11][12][13][14][15][16][17][18][19][20] carried out by researcher are focused on gas-powder injection. Lou and Zhu [8] developed a numerical coupled model to analyse the influence of bubbly plume flow, powder particle motion on the multiphase flow behaviour of LPI, combing computation fluid dynamics, population balance model and simultaneous reaction model.…”

Section: Introductionmentioning

confidence: 99%

“…Lou and Zhu [8] developed a numerical coupled model to analyse the influence of bubbly plume flow, powder particle motion on the multiphase flow behaviour of LPI, combing computation fluid dynamics, population balance model and simultaneous reaction model. Cheng and Zhu [9] calculated the transfer behaviour of particulate flow using Eulerian-Lagrangian approach and investigated the influence of wall roughness on the trajectories of particles and the velocity field distribution. Dong et al [10] developed a mathematical model is developed to describe the gas-powder flow and powder accumulation with different gas flow rates and cohesive zone shape.…”

Section: Introductionmentioning

confidence: 99%

Effect of powder injection rate on the flow field of coherent lime powder injection (C-LPI) for EAF steelmaking

Wei

Zhu

Feng

et al. 2020

Ironmaking & Steelmaking

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The technology of coherent lime powder injection (C-LPI) was developed and applied in the electric arc furnace steelmaking, which can inject lime powder into the molten pool deeply and effectively. In this paper, a computational fluid dynamics model of C-LPI was developed and the results of numerical simulation were validated by measured data. And then, the interaction between lime powder and carrier gas and the effect of powder injection rate on the jet behaviour of C-LPI were analysed. Results show that more lime powder can keep more kinetic energy in storage and the energy transformation from lime powder to carrier gas could delay the gas velocity attenuation. With larger powder injection rate, more lime powder tends to get together in the middle of gas-powder jet and a part of O2 would be pushed out to the surroundings, which would promote the shrouding combustion reactions at the initial section of C-LPI.

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“…With the increase of demands for high quality and ultralow sulfur grade steel, high efficiency of ladle desulfurization has become one of main objectives in the steelmaking process because sulfur in most of steel products is detrimental. Ladle bottom powder injection (L-BPI), is a new refining technology that the fine refining powders are injected into liquid steel for desulfurization through bottom slot plugs in ladle, [1][2][3][4][5] as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Desulfurization Behavior in Ladle with Bottom Powder Injection

et al. 2018

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A computation fluid dynamics-population balance model-simultaneous reaction model (CFD-PBM-SRM) coupled model was used to predict the reaction kinetic and desulfurization behavior in 80 ton ladle with bottom powder injection. The reaction rate and evolution of multi-components including Al, S, Si, Mn and Fe at the powder droplet-liquid steel interface, bubble-liquid steel interface, top slag-liquid steel interface and air-liquid steel interface were revealed. Then, the effects of different kinetic conditions on the desulfurization efficiency were investigated, and the importance of various mechanisms was discussed and clarified. The results show that at the lower powder injection rate, the desulfurization is mainly attributed to the joint effort of both powder-liquid steel reaction and top slag-liquid steel reaction which is the prevailing mechanism. At the higher powder injection rate, the powder particle-liquid steel and bubble-liquid steel interface reaction become more important and then predominate the desulfurization behavior. With the increase of gas flow rate, the total desulfurization ratio gradually decreases, and with the increasing of powder injection rate, the total desulfurization ratio increases.

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Theoretical Analysis and Experiment of Liquid Metal Penetration into Slot Plug Applied for Refining Ladles

Cited by 15 publications

References 16 publications

Numerical study of creep effect on purging plug performance under cyclic service

Numerical study of creep effect on purging plug performance under cyclic service

Effect of powder injection rate on the flow field of coherent lime powder injection (C-LPI) for EAF steelmaking

Numerical Simulation of Desulfurization Behavior in Ladle with Bottom Powder Injection

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