scholarly journals Bubbly Mold Flow in Continuous Casting: Comparison of Numerical Flow Simulations with Water Model Measurements

2020 ◽  
Vol 91 (12) ◽  
pp. 2000415
Author(s):  
Mirko Javurek ◽  
Raimund Wincor
Keyword(s):  
Continuous Casting ◽  
Water Model ◽  
Flow Simulations ◽  
Mold Flow

scholarly journals Effect of SEN immersion depth on mold flow profile and slag entrapment during continuous casting of steel

10.30544/653 ◽  
2021 ◽  
Author(s):  
Mallikarjuna Rao P ◽  
Vaibhav Vasantrao Chougale ◽  
Satish Kumar D ◽  
Rajendra T ◽  
Balachandran G
Keyword(s):  
Continuous Casting ◽  
Casting Speed ◽  
Immersion Depth ◽  
Water Model ◽  
Flow Profile ◽  
Continuous Casting Of Steel ◽  
Water Modeling ◽  
Wide Range ◽  
Mold Flow ◽  
Slag Entrapment

Mold flux entrapment during continuous casting of steel contributes to both surface and sub-surface defects in the final product. Continuous casting operating parameters such as casting speed, SEN immersion depth, SEN port geometry, argon flow, and mold EMS significantly affect the mold flow conditions and flow profile. During continuous casting operation, SEN immersion depth is continuously varied to avoid localized erosion of SEN, and it impacts the flow dynamics in the mold. In the present work, water modeling studies were carried out for a wide range of mold widths (1200-1800 mm) and casting speeds (0.8-1.4 m/min) on a 0.5 scaled down water model to optimize casting speed for different combinations of SEN immersion depth and mold width. Results from water modeling were further validated using nail board studies in the actual plant. A safe operating matrix was identified from these experiments to avoid mold slag entrapment during continuous casting.

Study of Mold Fluid Flow on a New Type Nozzle Bottom in Continuous Casting of Steel

2011 ◽  
Vol 284-286 ◽  
pp. 1205-1208 ◽  
Author(s):  
Chuan Bo Ji ◽  
Jing She Li ◽  
Xiao Chuan Lin
Keyword(s):  
Continuous Casting ◽  
Flow Pattern ◽  
Water Model ◽  
Velocity Variation ◽  
Mold Surface ◽  
Continuous Casting Of Steel ◽  
Slab Casting ◽  
New Type ◽  
Mold Flow ◽  
The Impact

There are many serious problems are directly associated with the flow pattern in the mold in the continuous casting of steel process. The nozzle flow plays an important role in determining the mold flow pattern and to minimize casting defects. In this work a new type nozzle designed for a slab casting mold is developed. The 3-D steady k-ε finite-volume model has been applied to study the turbulent flow in nozzle and mold, which predict velocities agree with the impeller measurements in the water model well. The results show that nozzles with a mountain bottom are more impressionable to problems from asymmetric flow and large fluctuation on the mold surface. The impact of liquid at wave bottom nozzle can suppress the jet flow effectively and reduce the velocity variation.

scholarly journals Study of the Effect of a Plug with Torsion Channels on the Mixing Time in a Continuous Casting Ladle Water Model

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1942
Author(s):  
Gerardo Aguilar ◽  
Gildardo Solorio-Diaz ◽  
Alicia Aguilar-Corona ◽  
José Angel Ramos-Banderas ◽  
Constantin A. Hernández ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Mixing Time ◽  
Tangential Velocity ◽  
Water Model ◽  
Mixing Times ◽  
Low Velocity ◽  
Velocity Magnitude ◽  
Image Velocimetry ◽  
Casting Ladle ◽  
Upward Direction

The use of porous plugs in injecting gas through the bottom of a ladle forms vertical plumes in a very similar way to a truncated cone. The gas plume when exiting the plug has a smaller diameter compared to that formed in the upper zone of the ladle because inertial forces predominate over buoyancy forces in this zone. In addition, the magnitude of the plume velocity is concentrated in an upward direction, which increases the likelihood of low velocity zones forming near the bottom of the ladle, especially in lower corners. In this work, a plug with spiral-shaped channels with different torsion angles is proposed, with the objective that the gas, when passing through them, has a tangential velocity gain or that the velocity magnitude is distributed in the three axes and does not just focus on the upward direction, helping to decrease low velocity zones near the bottom of the ladle for better mixing times. For the experimentation, we worked in a continuous casting ladle water model with two configuration injections, which in previous works were reported as the most efficient in mixing the steel in this ladle. The results obtained using the PIV technique (particle image velocimetry) and conductimetry technique indicate that the plugs with the torsion channels at angles of 60° and 120° improve the mixing times for the two injection configurations.

Water model study of horizontal molten steel-Ar two-phase jet in a continuous casting mold

2000 ◽  
Vol 31 (3) ◽  
pp. 453-460 ◽  
Author(s):  
Manabu Iguchi ◽  
Norifumi Kasai
Keyword(s):  
Continuous Casting ◽  
Molten Steel ◽  
Water Model ◽  
Continuous Casting Mold ◽  
Two Phase ◽  
Casting Mold ◽  
Model Study

Level Estimation in a Water Model of Continuous Casting

2010 ◽  
Author(s):  
Francisco Sanchez ◽  
Raul Miranda-Tello ◽  
Cesar Real-Ramirez ◽  
Luis Hoyos ◽  
Miguel Ramirez ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Water Model

scholarly journals Oscillation of Confined Jets in Continuous Casting Mold Flow

PAMM ◽  
2006 ◽  
Vol 6 (1) ◽  
pp. 527-528 ◽  
Author(s):  
Mirko Javurek ◽  
Raimund Wincor ◽  
Markus Brummayer
Keyword(s):  
Continuous Casting ◽  
Continuous Casting Mold ◽  
Confined Jets ◽  
Casting Mold ◽  
Mold Flow

Effect of Bottom Structure of Submerged Entry Nozzle on Flow Field in Ultra-Thick Slab Continuous Casting Mold

2010 ◽  
Vol 154-155 ◽  
pp. 840-845 ◽  
Author(s):  
Xin Xie ◽  
Deng Fu Chen ◽  
Qiang Liu ◽  
Jia Long Shen ◽  
Zheng Peng ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Flow Pattern ◽  
Submerged Entry Nozzle ◽  
Casting Process ◽  
Surface Flow ◽  
Water Model ◽  
Continuous Casting Mold ◽  
Flat Bottom ◽  
Thick Slab ◽  
Flow Intensity

Submerged entry nozzle (SEN) bottom structure plays an important role in determining the flow pattern in continuous casting process. This work applies a water model to evaluate the pointed-bottom, flat-bottom and recessed-bottom nozzle performance in ultra-thick slab mold. The jet properties and surface flow are compared for the three kinds of nozzles quantitatively. The results show that flat-bottom and recessed-bottom nozzles are similar in flow pattern, but the pointed-bottom nozzle has smaller jet angle, thinner flow pattern, larger surface asymmetry rate, and higher surface flow intensity.

Study on Fluid Flow in a Large Round Bloom Continuous Casting Mold

2011 ◽  
Vol 402 ◽  
pp. 196-201 ◽  
Author(s):  
Liang Cai Zhong ◽  
Mao Qiang Zhang ◽  
Xi Hai Liu
Keyword(s):  
Fluid Flow ◽  
Mold Wall ◽  
Vertical Section ◽  
Immersion Depth ◽  
Water Model ◽  
Continuous Casting Mold ◽  
Recirculating Flow ◽  
Large Round ◽  
Mold Flow ◽  
Good Agreement

The fluid flow in an 800 mm diameter bloom mold from two kinds of submerged entry nozzles (SEN) was investigated numerically with a mathematical model and experimentally in a water model. It was shown from the research results that the impacting depths measured in the water modeling experiments are in good agreement with the ones from the numerical calculation. The impacting depths obtained from the 4-port down 5° SEN are 140~220 mm at immersion depths from 100 to 180 mm, while those from 5-port up 5° SEN are 60~120 mm at immersion depths from 100 to 140 mm. There are an upper and a lower recirculating zone for these two SENs at the vertical section through a port center. Dimension of these two recirculating flow zones varies with the immersion depth of the SENs. At 100 mm immersion depth of the tow SENs the eye of the upper recirculating flow is not evident. The eyes of the upper recirculating flows for 5-port up 5° SEN are close to the SEN, while the ones for 4-port down 5° SEN are close to the mold wall. On the liquid surface in the mold, flow produced with the 4-port SEN creates 8 recirculating flow zones close to the SEN, while 10 recirculating flow zones close to the mold wall are formed with the 5-port SEN.

scholarly journals Experimental and Numerical Analysis of the Free Surface in a Water Model of a Slab Continuous Casting Mold

2005 ◽  
Vol 45 (11) ◽  
pp. 1626-1635 ◽  
Author(s):  
Raul MIRANDA ◽  
Miguel Angel BARRON ◽  
Jose BARRETO ◽  
Luis HOYOS ◽  
Jesus GONZALEZ
Keyword(s):  
Free Surface ◽  
Numerical Analysis ◽  
Continuous Casting ◽  
Water Model ◽  
Continuous Casting Mold ◽  
Casting Mold ◽  
Slab Continuous Casting
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