Argon Bubble Coalescence and Breakup in a Steel Ladle with Bottom Plugs

2018 ◽  
Vol 90 (4) ◽  
pp. 1800396 ◽  
Author(s):  
Wenjie Liu ◽  
Justina Lee ◽  
Xipeng Guo ◽  
Armin K. Silaen ◽  
Chenn Q. Zhou
Keyword(s):  
Bubble Coalescence ◽  
Steel Ladle ◽  
Argon Bubble

Behaviour of air injection nozzles in dissolved air flotation

1995 ◽  
Vol 31 (3-4) ◽  
pp. 25-35 ◽  
Author(s):  
E. M. Rykaart ◽  
J. Haarhoff
Keyword(s):  
Bubble Coalescence ◽  
Second Phase ◽  
Initial Growth ◽  
Two Phase ◽  
Dissolved Air Flotation ◽  
Nozzle Orifice ◽  
Pressure Release ◽  
Air Volume ◽  
Air Flotation ◽  
Dissolved Air

A simple two-phase conceptual model is postulated to explain the initial growth of microbubbles after pressure release in dissolved air flotation. During the first phase bubbles merely expand from existing nucleation centres as air precipitates from solution, without bubble coalescence. This phase ends when all excess air is transferred to the gas phase. During the second phase, the total air volume remains the same, but bubbles continue to grow due to bubble coalescence. This model is used to explain the results from experiments where three different nozzle variations were tested, namely a nozzle with an impinging surface immediately outside the nozzle orifice, a nozzle with a bend in the nozzle channel, and a nozzle with a tapering outlet immediately outside the nozzle orifice. From these experiments, it is inferred that the first phase of bubble growth is completed at approximately 1.7 ms after the start of pressure release.

scholarly journals Multiphasic Study of Fluid-Dynamics and the Thermal Behavior of a Steel Ladle during Bottom Gas Injection Using the Eulerian Model

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1082
Author(s):  
Antonio Urióstegui-Hernández ◽  
Pedro Garnica-González ◽  
José Ángel Ramos-Banderas ◽  
Constantin Alberto Hernández-Bocanegra ◽  
Gildardo Solorio-Díaz
Keyword(s):  
Heat Exchange ◽  
Thermal Behavior ◽  
Gas Flow ◽  
Fluid Dynamic ◽  
Steel Slag ◽  
Scale Model ◽  
Discrete Ordinates ◽  
Transfer Model ◽  
Steel Ladle ◽  
Physical Scale

In this work, the fluid dynamic and thermal behavior of steel was analyzed during argon gas stirring in a 140-t refining ladle. The Eulerian multiphase mathematical model was used in conjunction with the discrete ordinates (DO) thermal radiation model in a steel-slag-argon system. The model was validated by particle image velocimetry (PIV) and the analysis of the opening of the oil layer in a physical scale model. The effect of Al2O3 and Mg-C as a refractory in the walls was studied, and the Ranz-Marshall and Tomiyama models were compared to determine the heat exchange coefficient. The results indicated that there were no significant differences between these heat exchange models; likewise, the radiation heat transfer model adequately simulated the thermal behavior according to plant measurements, finding a thermal homogenization time of the steel of 2.5 min for a gas flow of 0.45 Nm3·min−1. Finally, both types of refractory kept the temperature of the steel within the ranges recommended in the plant; however, the use of Al2O3 had better heat retention, which would favor refining operations.

Bubble coalescence inhibition in volatile solutions at elevated temperatures

2016 ◽  
Vol 94 (7) ◽  
pp. 1413-1422 ◽  
Author(s):  
Jianbiao Shen ◽  
Jian Huang ◽  
Chuanping Liu ◽  
Li Wang
Keyword(s):  
Elevated Temperatures ◽  
Bubble Coalescence

Bubble coalescence in viscous liquids

1971 ◽  
Vol 26 (6) ◽  
pp. 839-851 ◽  
Author(s):  
J.R. Crabtree ◽  
J. Bridgwater
Keyword(s):  
Bubble Coalescence ◽  
Viscous Liquids

Bubble coalescence in foaming process of polymers

2006 ◽  
Vol 46 (5) ◽  
pp. 680-690 ◽  
Author(s):  
Kentaro Taki ◽  
Kazuhide Tabata ◽  
Shin-ichi Kihara ◽  
Masahiro Ohshima
Keyword(s):  
Bubble Coalescence ◽  
Foaming Process

Computational Studies and Optimization of Inclusion Removal in a Steel Ladle

2021 ◽  
Author(s):  
A. Bhansali ◽  
J. Godinez ◽  
X. Guo ◽  
H. Oltmann ◽  
E. Pretorius ◽  
...  
Keyword(s):  
Steel Ladle ◽  
Computational Studies ◽  
Inclusion Removal

scholarly journals Interaction model of steel ladle of continuous caster in steel works

2016 ◽  
Vol 44 ◽  
pp. 02014
Author(s):  
Bang Fu Huang ◽  
Zhi Wei Ma ◽  
Nai Yuan Tian ◽  
Zhe Shi ◽  
Xiao Lei Zhou ◽  
...  
Keyword(s):  
Continuous Caster ◽  
Interaction Model ◽  
Steel Ladle ◽  
Steel Works
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