Analysis of Air-Mist Cooling Effect for Coil in the Electromagnetic Induction Controlled Automated Steel Teeming System

He, Ming; Wang, Qingwei; Zhao, Lijia; Liu, Xiaoming; Wang, Qiang

doi:10.2355/isijinternational.isijint-2020-681

Cited by 2 publications

(2 citation statements)

References 32 publications

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“…Efficient cooling for the coil is necessary (Kanamori et al, 2009). As we reported earlier, an air mist cooling approach can be used to minimize the coil temperature during the induction heating stage after installing WDS heat insulation material (He et al, 2021). Experiments revealed that the air mist cooling for 120 s reduces the coil temperature from 507°C to 255°C.…”

Section: Coil Temperature Variation During the Whole Thermal Cycle Pr...mentioning

confidence: 93%

A model to predict coil temperature evolution during the whole thermal cycle process of ladle with a novel steel teeming technology

WANG

et al. 2022

JTST

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Electromagnetic induction controlled automated steel teeming (EICAST) is a ladle-sand-free technology applied to the steel teeming process for clean steel practice. The temperature of the induction coil in the EICAST system greatly influence its service life. In this paper, a numerical model was developed to predict the temperature evolution of the induction coil without or with a nano thermal insulation felt (WDS) during the whole thermal cycle of ladle. Industrial experiment was conducted for the model validation. The results indicate that WDS reduces the coil temperature at the ladle baking and secondary refining stages, however it causes a rapid jump in the coil temperature from 309°C to 707°C during the induction heating process. Because the coil temperature is high enough compared to its ambient temperature after the induction heating stage, the temperature of the induction coil using WDS heat insulation material drops to 461°C constantly at the steel teeming stage. The measured temperatures of the nozzle brick and coil in the industrial experiment correspond well with the calculated ones by numerical simulation. The developed model could be used to predict the coil temperature evolution and improve coil cooling strategy at each stage of the whole thermal cycle process of ladle for the industrial application.

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Section: Coil Temperature Variation During the Whole Thermal Cycle Pr...mentioning

confidence: 93%

A model to predict coil temperature evolution during the whole thermal cycle process of ladle with a novel steel teeming technology

WANG

et al. 2022

JTST

Self Cite

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“…[ 23 ] And its temperature could be kept in a low range by the heat insulation and air‐mist cooling. [ 24,25 ] Direct current (DC) is applied to produce a static electromagnetic field near the nozzle. The static electromagnetic field interacts with the tangential velocity of molten steel to generate an electromagnetic force.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Design of Vortex Suppression Utilizing Static Electromagnetic Field during Steel Teeming from Ladle

Zhao

et al. 2022

steel research int.

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Vortex slag entrapment during ladle teeming process causes liquid steel pollution, nozzle clogging, etc. Tangential velocity of molten steel is directly related to the vortex. Herein, the tangential velocity is reduced by the electromagnetic force generated by the interaction between a static electromagnetic field and the molten steel. Through the multiphysical field simulation, influences of the electromagnetic parameter, coil structure, coil position, and ladle structure on the vortex are investigated. Results demonstrate that magnetic induction intensity is proportional to the coil ampere‐turns, thereby affecting the vortex suppression. The action region of the static electromagnetic field expands when the coil diameter increases from 180 to 360 mm; it is beneficial to reduce the vortex critical height by 37.9%. The reduction of the distance between the coil and the molten steel also promotes the vortex suppression. The coil misalignment is beneficial to fully utilize the electromagnetic field; the critical height is reduced by 15%. The tangential velocity is changed when the nozzle diameter and eccentricity are optimized, and the vortex suppression will be amplified by using the electromagnetic field. This study provides the theoretical guidance for the optimizing design of the vortex suppression utilizing the static electromagnetic field.

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Analysis of Air-Mist Cooling Effect for Coil in the Electromagnetic Induction Controlled Automated Steel Teeming System

Cited by 2 publications

References 32 publications

A model to predict coil temperature evolution during the whole thermal cycle process of ladle with a novel steel teeming technology

A model to predict coil temperature evolution during the whole thermal cycle process of ladle with a novel steel teeming technology

Optimizing Design of Vortex Suppression Utilizing Static Electromagnetic Field during Steel Teeming from Ladle

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