Computer analysis of molten steel flow and application to design of nozzles for continuous casting system

2018 ◽  
Vol 2 (4) ◽  
pp. 36 ◽  
Author(s):  
Arito Mizobe ◽  
Jouji Kurisu ◽  
Masanori Ueki
Keyword(s):  
Kinetic Energy ◽  
Continuous Casting ◽  
Molten Steel ◽  
Flow Analysis ◽  
Submerged Entry Nozzle ◽  
Fundamental Principle ◽  
Water Model ◽  
Casting System ◽  
High Kinetic Energy ◽  
Steel Flow

In steel continuous casting system, nozzles have an important role on the flow rate control of the molten steel and the elimination of the inclusions etc. Based on the fundamental principle of hydrodynamics, the optimal nozzle bore profile was determined for both tundish (TD) upper nozzle and submerged entry nozzle (SEN) with aiming to suppress the turbulence with high kinetic energy generated in the flow of the molten steel. A simulation by flow analysis using computational fluid dynamics (CFD) and a water model experiment were performed and clarified that the turbulence with high kinetic energy could be minimized in the nozzles with newly devised inner bore profile. The actual nozzle devised was manufactured and tested in the steel works with satisfying results. The adhesion of the alumina inclusions to the both nozzles is reduced by lowering the turbulent kinetic energy since the energy loss is minimized at the part. Both stability in the operation and quality of the steels have been brought by the present development.

scholarly journals Water Model Study on Convection Pattern of Molten Steel Flow in Continuous Casting Tundish.

1998 ◽  
Vol 38 (8) ◽  
pp. 843-851 ◽  
Author(s):  
Dong-Yuan Sheng ◽  
Chang-Soo Kim ◽  
Jong-Kyu Yoon ◽  
Tse-Chiang Hsiao
Keyword(s):  
Continuous Casting ◽  
Molten Steel ◽  
Water Model ◽  
Convection Pattern ◽  
Model Study ◽  
Continuous Casting Tundish ◽  
Steel Flow

Effects of U-Shape Inner Cooler on Flow and Solidification of Molten Steel in Slab Continuous Casting Mold

2011 ◽  
Vol 291-294 ◽  
pp. 423-427
Author(s):  
Yan Juan Jin ◽  
Xiao Chao Cui ◽  
Zhu Zhang
Keyword(s):  
Fluid Dynamics ◽  
Temperature Field ◽  
Flow Field ◽  
Continuous Casting ◽  
Molten Steel ◽  
Continuous Casting Mold ◽  
Slab Continuous Casting ◽  
Cooling Technology ◽  
Steel Flow

An inner-outer coupled cooling technology of molten steel for 1240×200mm slab continuous casting, that is to set an inner cooler—U shape pipes in the mold, is put forward in order to enhance the efficiency of transmitting heat and improve inner structure of billet. The flow status and solidification status of molten steel under coupling flow field and temperature field in inner-outer coupled cooling mold are simulated by using fluid dynamics software, and compare with those in traditional mold. It is found that setting inner cooler in the mold can make molten steel flow status even, which is favorable to floating up of the inclusion, quickening the solidification of steel liquid and improving the quality of billet.

Numerical Simulation of Inner-Outer Couple Cooling Slab Continuous Casting in the Filling Process

2012 ◽  
Vol 557-559 ◽  
pp. 2257-2260
Author(s):  
Yan Juan Jin ◽  
Xiao Chao Cui ◽  
Yan Xia Chen
Keyword(s):  
Temperature Field ◽  
Flow Field ◽  
Continuous Casting ◽  
Molten Steel ◽  
Solidification Rate ◽  
Surface Shape ◽  
Filling Process ◽  
Slab Continuous Casting ◽  
Free Surface Shape ◽  
Steel Flow

In the paper, flow status and solidification status of molten steel in inner-outer couple cooling mold in the filling process are simulated by using fluid dynamics software Flow-3d, and obtain distributing diagrams of flow field and temperature field and free-surface shape diagrams in the filling process. Influences of flow field and temperature field of filling process on solidification are analyzed in the slab continuous casting. It is indicated that inner cooler can improve molten steel flow status, which is favorable to inclusion in molten steel floating up, quicken the solidification rate of molten steel in the mold.

scholarly journals Numerical Simulation on the Brake Effect of FAC-EMBr and EMBrRuler in the Continuous Casting Mold

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1620
Author(s):  
Zhuang Li ◽  
Lintao Zhang ◽  
Yanming Bao ◽  
Danzhu Ma
Keyword(s):  
Magnetic Field ◽  
Molten Steel ◽  
Casting Speed ◽  
Submerged Entry Nozzle ◽  
Pole Position ◽  
Level Fluctuation ◽  
Steel Flow ◽  
Magnetic Poles ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

The brake effect of the freestanding adjustable combination electromagnetic brake (FAC-EMBr) and EMBr ruler on the behavior of molten steel flow and the level fluctuation were investigated with the numerical method. The effects of the horizontal magnetic pole position (EMBr ruler), magnetic induction intensity, and casting speed on two types of electromagnetic brakes were studied. The numerical simulation results show that the magnetic field caused by the EMBr ruler is mainly distributed under the submerged entry nozzle (SEN), and it is very weak nearby the meniscus area. After the FAC-EMBr is applied, the magnetic field is mainly distributed in the area below the submerged entry nozzle, the upper roll region, and in the meniscus region. The application of the electromagnetic brake can effectively suppress the impact of the jet and decrease the molten steel velocity in the meniscus area. The brake effect of the EMBr ruler on the behavior of the molten steel flow and the level fluctuation is significantly influenced by the horizontal magnetic pole position. The increasing of the magnetic flux density can significantly increase the velocity of molten steel in the upper roll region and lead to an intense fluctuation in the steel/slag interface, as the horizontal magnetic field cannot cover the three key regions. The brake effect of the FAC-EMBr is less influenced by the variation of the process parameters due to the addition of vertical magnetic poles. Additionally, the “secondary braking effect” of the vertical magnetic poles can help to lower the increase of velocity in the upper roll region caused by the excessive magnetic induction intensity and the high casting speed. Therefore, even under the high casting speed conditions, the application of a new type of FAC-EMBr is also an efficient way to suppress the molten steel flow and level fluctuation at the meniscus area and decrease the possibility of slag entrapment.

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.

Influence of Inner Cooler on Flow of Molten Steel in Slab Continuous Casting Mold

2012 ◽  
Vol 217-219 ◽  
pp. 1942-1945
Author(s):  
Zhu Zhang ◽  
Yan Juan Jin ◽  
Jun Ting Zhang
Keyword(s):  
Fluid Dynamics ◽  
Continuous Casting ◽  
Molten Steel ◽  
Continuous Casting Mold ◽  
Casting Mold ◽  
Slab Continuous Casting ◽  
Cooling Technology ◽  
Steel Flow

In the paper a inner-outer couple cooling technology of molten steel for 1240×200mm slab continuous casting, that is to set an inner cooler-U shape pipes in the mold, is put forward in order to enhance the efficiency of transmitting heat and improve the flow status of molten steel. The flow status of molten steel in inner-outer couple cooling mold is simulated by using fluid dynamics software. It is found that setting inner cooler in the mold can make molten steel flow status even, which partly act as electromagnetic trig and is favorable to inclusion in molten steel floating up.

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