Stirring and its effect on aluminum deoxidation of steel in the ASEA-SKF furnace: Part I. Plant scale measurements and preliminary analysis

Nakanishi, Koji; Szekely, J.; Fujii, Tetsuya; Mihara, Yoshinori; Iwaoka, S.

doi:10.1007/bf02825685

Cited by 23 publications

(19 citation statements)

References 3 publications

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“…The formation and growth of inclusions in steel was studied extensively 25-40 years ago by different researchers, such as Elliott and coworkers, 53,54 Flemings and co-workers, 54 Turkdogan, 55,56 Olette and coworkers, [57][58][59] Fruehan and coworkers, 60 Szekely and coworkers, [61][62][63][64] Cramb and coworkers, [65][66][67][68] Thomas and coworkers, 69,70 and Zhang.…”

Section: -10mentioning

confidence: 99%

Nucleation, Growth, Transport, and Entrapment of Inclusions During Steel Casting

Zhang

2013

JOM

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Section: -10mentioning

confidence: 99%

Nucleation, Growth, Transport, and Entrapment of Inclusions During Steel Casting

Zhang

2013

JOM

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“…Moreover, for high-capacity ladles used in many steel factories of China, two porous plugs are usually utilized, and their positions and relative angle have effect on the homogenization of molten steel. 1,6) For the function of argon gas in ladle refining, many studies were performed in the earlier years through water model 1,2,4,6) and mathematical simulation 5,[7][8][9] from different aspects such as (a) gas injection and transport, [10][11][12][13] (b) the effect of top slag layer, [14][15][16][17][18][19] (c) stirring and mixing. [20][21][22][23][24][25][26][27][28] In 1975, Nakanishi et al 10) investigated the correlation between gas mixing efficiency and mass transfer in a model ladle and explained this correlation with turbulence theory.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gas Blown Modes on Mixing Phenomena in a Bottom Stirring Ladle with Dual Plugs

Tang

Guo

et al. 2016

ISIJ International

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Gas stirring plays a significant role in steelmaking process. The stirring effect is often assessed by the mixing time. In the past, the effects of many factors such as the number and position and relative angle of porous plugs in a ladle, as well as gas flowrate on the mixing time have been studied and some beneficial results used in industrial practice. However, for a ladle with dual plugs, the researches on gas flowrate basically focused on the blowing mode with the same gas flowrates for every plug (Mode-S), while the mode with different flowrates (Mode-D) has not yet been reported. In the present work, a water model for a 120 t ladle is carried out to mainly compare the effect of the two gas blowing modes on mixing. Two porous plugs are located at 0.55-0.70R (R is the radius of ladle bottom), with different relative angles (45-180°) and total flowrates (6.92-18.45 NL/min). The results show that Mode-D can significantly change the mixing time. Compared with Mode-S, the mixing time is respectively decreased by 50 seconds at 6.92 NL/min and 30 seconds at 18.45 NL/min when the plug positions are located at 0.64R. The results of mathematical simulation explain the phenomena. In the Mode-D, the strong gas plume forms a larger circulation flow to stir the ladle and the weak plume forms a smaller one. Under this case, the interference and collision from two plumes are weakened and the dissipation of stirring energy is decreased, thus the mixing time is shortened.

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“…However, the analysis of particle formation processes with twodimensional flow fields can lead to large mathematical expenses. Nakanishi and coworkers [31][32] approximated the flow present in a ladle by a circulation flow ( Fig. 1) and could describe comparatively well the experimental mixing progresses in the ladle by that means.…”

Section: Fundamental Equationsmentioning

confidence: 99%

“…1 given by Nakanishi and coworkers [31,32] with the Eqs. (3), (8), (9), (t 0), (23) and (27) a system of equations…”

Section: Fundamental Equationsmentioning

confidence: 99%

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Buildup of concentration excess during the deoxidation of a circulating steel melt with aluminium

Chung

Lange

1989

Wärme- und Stoffübertragung

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W~r m eW~irme-und Stofftibertragung 24, 61 -78 (1989) u n d S t o f f O b e r t r a g u n g © Springer-Verlag 1989Buildup of concentration excess during the deoxidation of a circulating steel melt with aluminium S.-H. Chung and K.W. Lange, Aachen, F R G Abstract. In order to understand the particle formation processes during the precipitation deoxidation of steel melts with aluminium, in the present work a relationship for the rate of the concentration excess buildup is derived according to Slezov from the differential equations for convective diffusion and simultaneous reaction and from the mass action law for the system Fe-AI-O, using the one-dimensional circulation flow field proposed by Nakanishi and coworkers because of computation expense.

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Stirring and its effect on aluminum deoxidation of steel in the ASEA-SKF furnace: Part I. Plant scale measurements and preliminary analysis

Cited by 23 publications

References 3 publications

Nucleation, Growth, Transport, and Entrapment of Inclusions During Steel Casting

Nucleation, Growth, Transport, and Entrapment of Inclusions During Steel Casting

Effect of Gas Blown Modes on Mixing Phenomena in a Bottom Stirring Ladle with Dual Plugs

Buildup of concentration excess during the deoxidation of a circulating steel melt with aluminium

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