Numerical and Experimental Investigations of Steel Mixing Time in a 130-t Ladle

Warzecha, M.; Jowsa, J.; Warzecha, P.; Pfeifer, Herbert

doi:10.1002/srin.200806210

Cited by 30 publications

(22 citation statements)

References 30 publications

(31 reference statements)

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“…They reported a value of 7-8 minutes, independently of the ladle size. In contrast to these values, Warzecha et al 16) and Aoki et al 17) have reported mixing times in the range from 1.5-3 minutes for ladles of 110-140 tonnes, using gas flow rates in the order of 10 Nm 3 /hr. The large differences reported for mixing times in industrial size ladles can be attributed to different porous plugs configurations (i.e., number and location) as well as gas flow rate, however our current numerical predictions suggest that mixing times in industrial size ladles is at least one order of magnitude higher in comparison with water models.…”

Section: δT T T Z Z Zmentioning

confidence: 88%

“…Only few investigations have reported mixing time for industrial size ladles. [13][14][15][16][17] Abel et al 13) compared water modelling results and industrial size ladles, reporting mixing times one order of magnitude higher for industrial size ladles. In the experimental work of Schurmann et al reported by Mietz et al 14) a mixing time of approximately 12 minutes is reported for an industrial ladle of 120 tonnes.…”

Section: δT T T Z Z Zmentioning

confidence: 99%

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Effect of Both Radial Position and Number of Porous Plugs on Chemical and Thermal Mixing in an Industrial Ladle Involving Two Phase Flow

et al. 2011

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Gas injection in metallurgical vessels is an important tool to improve chemical and thermal mixing. Chemical mixing has been extensively studied in the past 40 years, however, thermal mixing is still poorly understood. This work reports a mathematical model developed to describe the effect of the number and position of porous plugs on thermal and chemical mixing under industrial conditions.A relevant contribution of this work is the evidence indicating a suppressing effect of bottom gas injection on thermal homogenization with off-center gas injection; furthermore, it also suggests that mixing time is optimized with only one nozzle instead of two or three.

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Section: δT T T Z Z Zmentioning

confidence: 88%

Section: δT T T Z Z Zmentioning

confidence: 99%

Effect of Both Radial Position and Number of Porous Plugs on Chemical and Thermal Mixing in an Industrial Ladle Involving Two Phase Flow

et al. 2011

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“…Liu et al (9) measured slag eye area in a water model for different gas flow rates, slag layer thickness and porous plug locations. Several numerical simulation models [10][11][12][13] have been proposed for investigating the fluid flow and mixing phenomena in gas stirred ladles. Mazumdar et al (14) made an extensive review of physical modelling, combined physical and mathematical modelling and mathematical modelling studies.…”

Section: Introductionmentioning

confidence: 99%

A CFD and Experimental Investigation of Slag Eye in Gas Stirred Ladle

Ramasetti¹,

Visuri²,

Sulasalmi³

et al. 2018

Proceedings of the 5th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'18)

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-In ladle metallurgy, gas stirring and behavior of the slag layer are very important for the quality of the steel. When gas is injected through a nozzle located at the bottom of the ladle into the metal bath, the gas jet exiting the nozzle breaks up into gas bubbles. The rising bubbles break the slag layer and create a slag eye. In this paper, the behavior of the slag eye area for different gas flow rates is been investigated through experimental measurements and CFD simulations. A 1/5-scale water model of 150 ton-ladle was deployed for the experimental measurements and for studying the effect of gas flow rate on the slag eye diameter. The physical modelling results show that the slag eye area changes from 20 to 182 cm 2 when the gas flow rate increases from 1.

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“…Thus, the convenient solution is to carry out research with the use of water models and computational simulation (applied commonly in metallurgy of steel and non-ferrous metals) [6][7][8][9][10][11][12][13]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Physical Modelling Of The Steel Flow In RH Apparatus

Pieprzyca¹,

Merder²,

Saternus³

et al. 2015

Archives of Metallurgy and Materials

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The efficiency of vacuum steel degassing using RH methods depends on many factors. One of the most important are hydrodynamic processes occurring in the ladle and vacuum chamber. It is always hard and expensive to determine the flow character and the way of steel mixing in industrial unit; thus in this case, methods of physical modelling are applied. The article presents the results of research carried out on the water physical model of RH apparatus concerning the influence of the flux value of inert gas introduced through the suck legs on hydrodynamic conditions of the process. Results of the research have visualization character and are presented graphically as a RTD curves. The main aim of such research is to optimize the industrial vacuum steel degassing process by means of RH method.

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Numerical and Experimental Investigations of Steel Mixing Time in a 130-t Ladle

Cited by 30 publications

References 30 publications

Effect of Both Radial Position and Number of Porous Plugs on Chemical and Thermal Mixing in an Industrial Ladle Involving Two Phase Flow

Effect of Both Radial Position and Number of Porous Plugs on Chemical and Thermal Mixing in an Industrial Ladle Involving Two Phase Flow

A CFD and Experimental Investigation of Slag Eye in Gas Stirred Ladle

Physical Modelling Of The Steel Flow In RH Apparatus

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