Effect of Refining Slag Phase Composition on Ladle Furnace Unit Lining Life1

Sheshukov, O. Yu.; Nekrasov, I. V.; Михеенков, М. А.; Egiazar’yan, D. K.; Ovchinnikova, L. A.; Kashcheev, I. D.; Zemlyanoi, K. G.; Kamenskikh, V. A.

doi:10.1007/s11148-016-9937-2

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…The heat balance has been studied in some specialized works (Çamdali and Tunç, 2006;Glaser, Görnerup, and Sichen, 2011;Zimmer et al, 2008;Duan et al, 2018;Zhang et al, 2009). The effect of slag composition has been studied in multiple works (Bai et al, 2022;Jansson, 2008;Kasimagwa, Brabie, and Jönsson, 2014;Mattila, Vatanen, and Harkki, 2002;Sarkar, Nash, and Sohn, 2020;Sheshukov et al, 2016;Zhu et al, 2018). A critical step in developing prediction models is the local mass transfer between the lining and slag/metal.…”

Section: Previous Work On Ladle Lining Erosionmentioning

confidence: 99%

A pragmatical physics-based model for predicting ladle lifetime

Johansen,

Levfall,

Duran

2024

J. S. Afr. Inst. Min. Metall.

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In this paper we develop a physics-based model for lining erosion in steel ladles. The model predicts the temperature evolution in the liquid slag, steel, refractory bricks, and outer steel shell of the ladle. The flow of slag and steel is due to forced convection induced by inert gas injection, vacuum treatment (extreme bubble expansion), natural convection, and waves caused by the gas stirring. The lining erosion takes place by dissolution of refractory elements into the steel or slag. The mass and heat transfer coefficients inside the ladle during gas stirring are modelled based on wall functions which take the distribution of wall shear velocities as a critical input. The wall shear velocities are obtained from computational fluid dynamics (CFD) simulations for a sample of scenarios, spanning out the operational space, and a model is developed using curve fitting. The model is capable of reproducing both thermal and erosion evolution well. Deviations between model predictions and industrial data are discussed. The model is fast and has been tested successfully in a 'semi-online' application. The model source code is available to the public at [https://github.com/SINTEF/refractorywear].

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Section: Previous Work On Ladle Lining Erosionmentioning

confidence: 99%

A pragmatical physics-based model for predicting ladle lifetime

Johansen,

Levfall,

Duran

2024

J. S. Afr. Inst. Min. Metall.

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“…The boundary conditions are the same as the above. The inner surface temperature of the ladle lining working layer under ladle holding conditions is set as 1500 • C. 49…”

Section: Setting Of Lining Materials Properties and Boundary Conditionsmentioning

confidence: 99%

Numerical simulation of thermal insulation and longevity performance in new lightweight ladle

Sun

Tian

et al. 2020

Concurrency and Computation

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For meeting the comprehensive requirements of "super insulation," "lightweight," and "longevity" of the contemporary ladle, this article designs a new kind of lightweight ladle with heat preservation and longevity performance, and based on steady-state analysis method and numerical simulation technology, the comparison of temperature distribution between new lightweight and traditional ladle under typical operating modes is made and analyzed. The simulation results of temperature field prove that the performance of heat preservation in new kind of lightweight ladle has been improved obviously from the two aspects of ladle shell temperature and molten steel file rate. At the same time, the simulation results of stress field indicate that the stress of designed lightweight ladle reduced and distributed more evenly, which is conducive to prolonging the work time in-service of the ladle. Finally, based on the field test, the simulation is proved to be effective, and the designed ladle structure achieves the expected purpose.

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The Hydration Activity Enhancement Method of Mayenite in Ladle Slag: A Review

Duan,

Chao,

Zhang

et al. 2024

steel research int.

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As a byproduct of the steelmaking process, ladle slag has the potential to be used as an auxiliary cement material in the construction field. However, ladle slag generated after secondary refining is typically handled by air cooling and stacking, leading to the presence of the typical mineral phase mayenite (Ca12Al14O33, abbreviated as C12A7) in a crystalline form within the slag. This reduces its early hydration activity, which adversely affects the compressive strength of concrete and consequently lowers the resource utilization rate of ladle slag. Based on this, this article provides a comprehensive review of the generation process and composition of ladle slag. By discussing the hydration process and hydration products of the typical mineral phase C12A7 in ladle slag, as well as the mutual transformation of hydration products, it is shown that hydration products undergo transformation with increasing temperature. Compared to crystalline C12A7, amorphous, C12A7 exhibits excellent hydration activity. Building upon this, methods for amorphizing C12A7 are elucidated, wherein thermal activation or chemical activation is employed to alter the ordered arrangement of atoms within the crystal structure, thereby reducing the stability of the crystal structure to achieve amorphization of C12A7.

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Effect of Refining Slag Phase Composition on Ladle Furnace Unit Lining Life1

Cited by 10 publications

References 3 publications

A pragmatical physics-based model for predicting ladle lifetime

A pragmatical physics-based model for predicting ladle lifetime

Numerical simulation of thermal insulation and longevity performance in new lightweight ladle

The Hydration Activity Enhancement Method of Mayenite in Ladle Slag: A Review

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