Basic Oxygen Furnace: Assessment of Recent Physicochemical Models

Vos, Lotte De; Bellemans, Inge; Vercruyssen, Carina; Verbeken, Kim

doi:10.1007/s11663-019-01677-y

Cited by 12 publications

(2 citation statements)

References 80 publications

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“…Gu et al [29] investigated the effect of temperature on de-P kinetics in bloated droplets and C free droplets containing different concentration of S (0.007 to 0.0014 wt pct). One of the significant findings from the research shows that the de-P rate in a droplet is fast (i.e.…”

Section: Refining Kineticsmentioning

confidence: 99%

“…completes within 6 s) compared to the droplet residence time. On the other hand, many studies [11,12,14,16,[27][28][29] highlighted that the de-C was found to be more favorable in droplets than in the hot metal bath. Mathematical models [7,8,24,26,[30][31][32][33] were also developed to compute the parameters (residence time, droplet generation rate, size, the effect of slag, and other elements) relevant to de-C in the emulsion zone.…”

Section: Refining Kineticsmentioning

confidence: 99%

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Droplet Heat Transfer in Oxygen Steelmaking

Madhavan

Brooks

Rhamdhani

et al. 2021

Metall Mater Trans B

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Bloated droplet phenomena play a vital role in the refining kinetics of basic oxygen steelmaking. Previous studies have developed extensive models to understand the kinetics of bloated droplets. However, no studies in the open literature address the thermal behavior of bloated droplets for a BOF (Basic oxygen furnace). The present work aims to develop a bloated droplet heat transfer model by incorporating the dynamic and chemical aspects taking place during the time of flight. The calculations were carried out with reasonable assumptions for a single droplet interacting with the slag/emulsion zone. The model was developed with the input experimental data (initial droplet temperature as 1853 K, initial diameter as 6.4 mm with a mass of 1 g, and a slag composition of 32 pct CaO, 35 pct SiO 2 , 17 pct Al 2 O 3 , 16 pct FeO) from Gu et al. Gu et al. and the results were validated. The study highlights the significance of how the chemical kinetics is influenced by the thermal characteristics of a droplet in a real BOF compared to the experimental scenario. The predicted results infer that the heat transfer contributed by radiation is 6 times greater than the convective heat transfer in a droplet. Moreover, by computing the droplet heat transfer efficiency, it was found that a droplet ejected from the hotspot losses approximately 73 pct of maximum heat to the surrounding.

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Section: Refining Kineticsmentioning

confidence: 99%

Section: Refining Kineticsmentioning

confidence: 99%

Droplet Heat Transfer in Oxygen Steelmaking

Madhavan

Brooks

Rhamdhani

et al. 2021

Metall Mater Trans B

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Effect of blowing parameters on bath mixing efficiency during basic oxygen furnace steelmaking process

Zhou

Liu

Wei

et al. 2021

Engineering Reports

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Basic Oxygen Furnace (BOF) steelmaking is the main method for steelmaking production, mixing efficiency of BOF vessel would greatly affect the uniformity of chemical composition and temperature in molten steel. Therefore, this paper conducted the effect of blowing parameters on bath mixing efficiency during BOF steelmaking process. Through measuring the mixing time of steel bath in BOF vessel, the effect of different blowing parameters was studied. Based on analysis of variance for the experimental results, the influence degree on mixing efficiency by different blowing parameters was acquired, and the optimized combination of blowing parameters was obtained. Moreover, the mixing index which indicated the mixing degree of steel bath in BOF vessel was proposed in this study, and an apparent nonlinear relation was acquired after determining relationship between the mixing index and blowing parameters. The optimal blowing parameters were applied to an 80 t industrial BOF vessel in a special steel plant, the end point carbon and oxygen equilibrium was decreased from 0.0032 to 0.0026, end point phosphorus and total Fe content in slag were reduced by 0.0012% and 2.21%, respectively. The mixing index and results presented in this work could be helpful to improve mixing efficiency in commercial BOF vessels.

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A Review of Mathematical Process Models for the Electric Arc Furnace Process

Hay

Visuri

Aula

et al. 2020

steel research int.

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The electric arc furnace is the main process unit in scrap‐based steelmaking. Owing to its importance, numerous mathematical models for predicting the course of the electric arc furnace process have been developed. This article reviews mathematical process models proposed in the literature, identifying the most common modeling approaches, and uses mathematical descriptions for the main phenomena. Furthermore, the validation of such models is discussed in detail. Finally, the article identifies gaps in the existing knowledge and provides suggestions for the further development of mathematical process models.

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Basic Oxygen Furnace: Assessment of Recent Physicochemical Models

Cited by 12 publications

References 80 publications

Droplet Heat Transfer in Oxygen Steelmaking

Droplet Heat Transfer in Oxygen Steelmaking

Effect of blowing parameters on bath mixing efficiency during basic oxygen furnace steelmaking process

A Review of Mathematical Process Models for the Electric Arc Furnace Process

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