Prediction of the Position on Solidification End Point of Continuous Caster

2011 ◽  
Vol 421 ◽  
pp. 67-70
Author(s):  
Ting Sheng Tu ◽  
Hong Liang Wang ◽  
Zuo Sheng Lei ◽  
Zhong Ming Ren
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Continuous Casting ◽  
Casting Speed ◽  
Continuous Caster ◽  
Shooting Technique ◽  
Soft Reduction ◽  
End Point ◽  
Continuous Casting Slab ◽  
Business Software

Solidification heat transfer in continuous casting slab was simulated with the business software CALCOSOFT. The position on solidification end point which obviously effect on soft reduction was predicted and verified by nail—shooting technique. It is shown from the numerical simulation that the casting speed affected the position significantly: the solidification end point moved backward 3 or 4m as the casting speed increased by 0.2m /min, while the casting temperature has little effect that the solidification end point moved backward only 0.2 or 0.25mm as it increased 6°C or 7°C.

Research on Solidification Numerical Simulation of Continuous Casting Slab Based on Nail-Shooting Experimentation

2011 ◽  
Vol 233-235 ◽  
pp. 2181-2184
Author(s):  
Liang Hua Feng ◽  
Miao Yong Zhu ◽  
Kun Liu
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Continuous Caster ◽  
Solidification Process ◽  
Cooling Zone ◽  
Secondary Cooling ◽  
Practical Result ◽  
Soft Reduction ◽  
Continuous Casting Slab ◽  
Secondary Cooling Zone

Mathematical model of heat transfer on solidification is established combined with the practical production situation of the continuous caster. The thickness of solidified slab shell in secondary cooling spot is determined by nail-shooting experimentation. Heat transfer coefficient on different secondary cooling zone is modified by nail-shooting result, thus the accuracy of the mathematical model is ensured. Comparing practical result with that calculated by mathematical model, it shows that modified model can simulate the heat transfer and solidification process, which can provide accurate end solidification spot and serve for soft reduction.

scholarly journals Mathematical Heat Transfer Model Research for the Improvement of Continuous Casting Slab Temperature

2005 ◽  
Vol 45 (9) ◽  
pp. 1291-1296 ◽  
Author(s):  
Hongming WANG ◽  
Guirong LI ◽  
Yucheng LEI ◽  
Yutao ZHAO ◽  
Qixun DAI ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Continuous Casting ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Continuous Casting Slab ◽  
Model Research ◽  
Slab Temperature

Heat Transfer and Solidification Model of Slab Continuous Casting Based on Nail-Shooting Experiments

2015 ◽  
Vol 1088 ◽  
pp. 153-158 ◽  
Author(s):  
An Gui Hou ◽  
Yi Min ◽  
Cheng Jun Liu ◽  
Mao Fa Jiang
Keyword(s):  
Heat Transfer ◽  
Continuous Casting ◽  
Liquid Core ◽  
Casting Process ◽  
Soft Reduction ◽  
Slab Continuous Casting ◽  
Solidification Model ◽  
Core Length ◽  
Measurement Results ◽  
Heat Transfer And Solidification

A heat transfer and solidification model of slab continuous casting process was developed, and the nail-shooting experiments were carried out to verify and improve the prediction accuracy. The comparison between the simulation and the measurements results showed that, there exists difference between the model predicted liquid core length and the calculated liquid core length according to the measurement results of the solidification shell thickness. In the present study, the value of constant a in the heat transfer coefficient calculation formula was corrected through back-calculation, results showed that, the suitable value of a is 31.650, 33.468 and 35.126 when the casting speed is 0.8m·min-1, 0.9m·min-1 and 1.0m·min-1 respectively, which can meet the liquid core length of the measurement results. The developed model built a foundation for the application of dynamic secondary cooling, and dynamic soft reduction.

scholarly journals Optimization on Reducing Slag Entrapment in 150 × 1270 mm Slab Continuous Casting Mold

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1774 ◽  
Author(s):  
Yang Wang ◽  
Shufeng Yang ◽  
Feng Wang ◽  
Jingshe Li
Keyword(s):  
Numerical Simulation ◽  
Continuous Casting ◽  
Casting Speed ◽  
Surface Velocity ◽  
Continuous Casting Mold ◽  
Slab Continuous Casting ◽  
Eddy Simulation ◽  
Submerged Entrance Nozzle ◽  
Dynamics Simulations ◽  
Slag Entrapment

To reduce slag entrapment in 150 × 1270 mm slab continuous casting molds at the Tang Steel Company, the effect of submerged entrance nozzle (SEN) depth and casting speed on the phenomenon was studied by computational fluid dynamics simulations. Then, the slag entrapment behavior in continuous casting molds, utilizing Large Eddy Simulation (LES) by coupling the volume of fluid (VOF) method, was also used. Finally, the effect of several common oils usually used to simulate slag in water modelling on slag entrapment was discussed and the water modelling results were used to validate the numerical simulation findings. The results showed that the optimum scheme is a submerged depth of SEN 90 mm and a casting speed of 1.6 m/min. Under optimal conditions, the maximum surface velocity is smallest (0.335 m/s) and the maximum slag entrapment ratio (0.44%) appears in the position of 0.1 m below the meniscus after 15 s. The water modelling results were in good agreement with the numerical simulation results.

Microstructural Effects of Electromagnetic Stirring Strength and Casting Speed in Continuous Casting of Al Alloy

2004 ◽  
Vol 449-452 ◽  
pp. 321-324 ◽  
Author(s):  
Dock Young Lee ◽  
Ki Bae Kim ◽  
Ho In Lee ◽  
Do Hyang Kim
Keyword(s):  
Continuous Casting ◽  
Process Parameters ◽  
Casting Speed ◽  
Surface Defect ◽  
Continuous Caster ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Electromagnetic Stirring ◽  
Al Alloy ◽  
Primary Crystal

Semi-solid forming usually requires feed stock material in form of cylindrical billets with a uniform, globular and fine grain microstructure. These billets are commonly being produced by continuous casting involving agitation of the solidifying melt. The paper will present the development of a horizontal continuous casting machine using circumferential electromagnetic stirring to generate melt flow and shear rate in the continuous casting mould. The machine has been used to study the influence of various process parameters such as electromagnetic stirring strength and casting speed in the production of Al billet with a diameter of 76mm. In order to establish the quantitative relationship between microstructure and the process parameters, the morphology and primary crystal size of billet were observed according to the casting speed and electromagnetic stirring strength. A depth and distance of surface defect on the billet was decreased with increasing a casting speed and a very good smooth surface without any surface defect appeared on the billet produced at a casting speed of 600mm/min. A thickness of the solidifying shell was decreased with increasing the casting speed and the maximum casting speed without a break-out was 600mm/min in horizontal continuous caster designed in this study. Both the size and the aspect ratio of primary crystal were decreased with increasing the casting speed and electromagnetic stirring strength in the range of this study.

Mechanism of Macrosegregation Formation in Continuous Casting Slab: A Numerical Simulation Study

2017 ◽  
Vol 48 (6) ◽  
pp. 3120-3131 ◽  
Author(s):  
Dongbin Jiang ◽  
Weiling Wang ◽  
Sen Luo ◽  
Cheng Ji ◽  
Miaoyong Zhu
Keyword(s):  
Numerical Simulation ◽  
Continuous Casting ◽  
Simulation Study ◽  
Continuous Casting Slab

Analytical Solution on the Relation of Technique Parameters for Continuous Casting with Heated Mould

2011 ◽  
Vol 337 ◽  
pp. 225-231
Author(s):  
Feng Ni ◽  
Shi Zhong Wei ◽  
Rui Long
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Continuous Casting ◽  
Casting Speed ◽  
Specific Conductance ◽  
Liquid Interface ◽  
Mould Temperature ◽  
Interface Position ◽  
Solid Liquid Interface ◽  
Solid Liquid

The technique of continuous casting with heated mould is a kind of near-net-shape processing technology, which combines unidirectional solidification with continuous casting and has been used widely for new material development and processing. A steady-state heat-transfer model was suggested for pure metal case. Some of modeling parameters, such as equivalent specific conductance and equivalent heat-transfer coefficient, etc, had been defined. The analytic solution of temperature profile along the axis of casting rod was obtained for solid-liquid interface to be as origin of position coordinate, by which the relations had been solved among mould temperature, casting speed, solid-liquid interface position, equivalent specific conductance between mould and metal, equivalent heat-transfer coefficient of cooling of cast rod, temperature gradient and cooling rate of melt in front of solid-liquid interface. As an example, the coordinate relations of solid-liquid interface position, mould temperature and casting speed were calculated and compared with experimental results in the case of pure copper. The calculation results conformed very well to the experimental ones. And it was indicated that the cooling rate of melt in front of solid-liquid interface had a nonlinear relation with casting speed during steady continuous casting process.

Robust Process Design for Continuous Casting Based on Numerical Simulation and Experimental Study

2012 ◽  
Vol 246-247 ◽  
pp. 341-345
Author(s):  
Shi Lun Zuo
Keyword(s):  
Numerical Simulation ◽  
Continuous Casting ◽  
Water Flow ◽  
Flow Rate ◽  
Casting Speed ◽  
Continuous Casting Machine ◽  
Water Flow Rate ◽  
Casting Machine ◽  
Cooling Water ◽  
Cooling Water Flow Rate

In order to improve design efficiency and reduce design cost, a new method combining numerical simulation with experimental verification was proposed in this study. Firstly, controllable process parameters such as continuous casting speed and cooling water flow rate, are robustly designed according to the numerical simulation results of flow field, process experiments were subsequently done on a newly developed continuous casting machine of lead slice, then the robust optimal design for the continuous casting process were gained. The results show that the cooling water flow significantly affects axial thickness of the lead slice, while the casting speed determines mainly its circumferential thickness. When the casting speed is between 280L/min and 320L/min, and the cooling water flow rate is between 950r/min and 1100r/min at the same time, the axial thickness and circumferential thickness can been kept respectively in1.0±0.03mm and 1.0±0.1mm, which meet the robust design requirements.

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