The Flow Behavior of Molten Steel in an RH Degasser Under Different Ladle Bottom Stirring Processes

2021 ◽  
Author(s):  
Rudong Wang ◽  
Yu Jin ◽  
Heng Cui
Keyword(s):  
Molten Steel ◽  
Flow Behavior

scholarly journals Flow behavior and heat transfer of molten steel in a two-strand tundish heated by plasma

2021 ◽  
Author(s):  
Mengjing Zhao ◽  
Yong Wong ◽  
Shufeng Yang ◽  
Jingshe Li ◽  
Wei Liu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Molten Steel ◽  
Flow Behavior

Three-Dimensional Numerical Simulation of Molten Steel Flow Behavior in Soft-Contact Electromagnetic Continuous Casting Mold

2012 ◽  
Vol 538-541 ◽  
pp. 1076-1079
Author(s):  
Xing Juan Wang ◽  
Li Guang Zhu ◽  
Ran Liu ◽  
Zhi Hao Li ◽  
Peng Tian
Keyword(s):  
Continuous Casting ◽  
Molten Steel ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Continuous Casting Mold ◽  
Soft Contact ◽  
Flow Process ◽  
Casting Mold ◽  
Steel Flow ◽  
Electromagnetic Continuous Casting

Using finite element method, the molten steel flow process in soft-contact electromagnetic continuous casting mold is simulated. The results show that the molten steel surface were affected by the electromagnetic force and shrink to the centre, near meniscus zone the flow velocity of steel increases and appears an obvious circumfluence, a large number of inclusion float and are absorbed by flux; on the other hand, the turbulent kinetic energy significant increases in circumfluence area, this exacerbates the reaction between flux and liquid steel, the initial size of the solidification organization are refined, and the surface quality of slab are enhanced.

scholarly journals Measurement of Molten Steel Velocity near the Surface and Modeling for Transient Fluid Flow in the Continuous Casting Mold

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 36 ◽  
Author(s):  
Tao Zhang ◽  
Jian Yang ◽  
Peng Jiang
Keyword(s):  
Continuous Casting ◽  
Molten Steel ◽  
Casting Speed ◽  
Surface Defects ◽  
Transient Flow ◽  
Flow Behavior ◽  
Surface Velocity ◽  
Phase Method ◽  
Mold Surface ◽  
Continuous Casting Mold

In the current work, a rod deflection method (RDM) is conducted to measure the velocity of molten steel near the surface in continuous casting (CC) mold. With the experimental measurement, the flow velocity and direction of molten steel can be obtained. In addition, a mathematical model combining the computational fluid dynamics (CFD) and discrete phase method (DPM) has been developed to calculate the transient flow field in a CC mold. The simulation results are compared and validated with the plant measurement results. Reasonable agreements between the measured and simulated results are obtained, both in the trends and magnitudes for the flow velocities of molten steel near the mold surface. Based on the measured and calculated results, the velocity of molten steel near the surface in the mold increases with increasing casting speed and the casting speed can change the flow pattern in the mold. Furthermore, three different types of flow patterns of molten steel in the mold can be obtained. The pattern A is the single-roll-flow (SRF) and the pattern C is the double-roll-flow (DRF). The pattern B is a transition state between DRF and SRF, which is neither cause the vortices nor excessive surface velocity on the meniscus, so the slag entrainment rarely occurs. Argon gas injection can slow down the molten steel velocity and uplift the jet zone, due to the buoyancy of bubbles. Combination of the measurement and numerical simulation is an effective tool to investigate the transient flow behavior in the CC mold and optimize the actual operation parameters of continuous casting to avoid the surface defects of the automobile outer panels.

scholarly journals Numerical Investigation of Flow Characteristics of Molten Steel in the Tundish with Channel Induction Heating

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1937
Author(s):  
Bin Yang ◽  
Hong Lei ◽  
Yingshi Xu ◽  
Kun Liu ◽  
Peng Han
Keyword(s):  
Fluid Flow ◽  
Flow Pattern ◽  
Numerical Investigation ◽  
Induction Heating ◽  
Molten Steel ◽  
Flow Behavior ◽  
Plug Flow ◽  
Flow Characteristics ◽  
Main Flow ◽  
Mixed Flow

In the continuous process, fluid flow is an important physical phenomena in the tundish, as it affects the process of heat transfer, bubble motion and inclusion collision-coalescence and grow up. This paper undertakes a detailed numerical investigation of fluid flow characteristics in the tundish with and without induction heating. The individual unit method and the volume subtraction model are applied to analyze the flow characteristics. A quantitative evaluation method of flow characteristics is proposed to investigate the flow characteristics. In the tundish with and without induction heating, firstly, the main flow behavior of molten steel is mixed flow in the receiving chamber; secondly, the main flow behavior of molten steel is plug flow in the channel; lastly, the main flow pattern is mixed flow, and the minor flow pattern is plug flow in the discharging chamber. The method of the volume subtraction model is an effective way to analyze the flow characteristics in the tundish with channel induction heating.

Investigation on the control of multiphase flow behavior in a continuous casting tundish during ladle change

2020 ◽  
Vol 117 (6) ◽  
pp. 619
Author(s):  
Rui Xu ◽  
Haitao Ling ◽  
Haijun Wang ◽  
Lizhong Chang ◽  
Shengtao Qiu
Keyword(s):  
Multiphase Flow ◽  
Flow Behavior ◽  
Rolled Strip ◽  
Impact Zone ◽  
Steel Cleanliness ◽  
Carry Over ◽  
Slag Carry Over ◽  
Hot Rolled ◽  
Turbulence Inhibitor ◽  
The Impact

The transient multiphase flow behavior in a single-strand tundish during ladle change was studied using physical modeling. The water and silicon oil were employed to simulate the liquid steel and slag. The effect of the turbulence inhibitor on the slag entrainment and the steel exposure during ladle change were evaluated and discussed. The effect of the slag carry-over on the water-oil-air flow was also analyzed. For the original tundish, the top oil phase in the impact zone was continuously dragged into the tundish bath and opened during ladle change, forming an emulsification phenomenon. By decreasing the liquid velocities in the upper part of the impact zone, the turbulence inhibitor decreased considerably the amount of entrained slag and the steel exposure during ladle change, thereby eliminating the emulsification phenomenon. Furthermore, the use of the TI-2 effectively lowered the effect of the slag carry-over on the steel cleanliness by controlling the movement of slag droplets. The results from industrial trials indicated that the application of the TI-2 reduced considerably the number of linear inclusions caused by ladle change in hot-rolled strip coils.

Microstructure Changes of Aluminum Titanate Refractory Doped SiO2 and ZrO2 in Molten Steel

2015 ◽  
Vol 48 (6) ◽  
pp. 116-122 ◽  
Author(s):  
Hyeong-Jun Kim ◽  
Dami Kim ◽  
Hyung-Tae Kim ◽  
Sung-Soo Ryu
Keyword(s):  
Molten Steel ◽  
Aluminum Titanate ◽  
Microstructure Changes
Sign in / Sign up

Export Citation Format

Share Document