Numerical Investigation of Inclusion Motion at Molten Steel–Liquid Slag Interface During Ruhrstahl Heraeus (RH) Process

JOM ◽  
2018 ◽  
Vol 70 (12) ◽  
pp. 2877-2885 ◽  
Author(s):  
Wei Liu ◽  
Shufeng Yang ◽  
Jingshe Li ◽  
Hongbo Yang
Keyword(s):  
Numerical Investigation ◽  
Molten Steel ◽  
Liquid Slag ◽  
Rh Process ◽  
Inclusion Motion

scholarly journals Mold Nonsinusoidal Oscillation Mode and Its Effect on Slag Infiltration for Lubrication and Initial Shell Growth during Steel Continuous Casting

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 418 ◽  
Author(s):  
Xiaobo Yan ◽  
Boran Jia ◽  
Qiangqiang Wang ◽  
Shengping He ◽  
Qian Wang
Keyword(s):  
Liquid Film ◽  
Molten Steel ◽  
Liquid Slag ◽  
Shell Growth ◽  
Oscillation Mode ◽  
Quantitative Prediction ◽  
Multiphase Model ◽  
Obvious Effect ◽  
Mold Slag ◽  
Mold Oscillation

The effect of nonsinusoidal oscillation at different modification ratios (α) on slag lubrication was investigated during mold oscillation. A validated and reliable multiphase model was employed, which involved flow and solidification of the molten steel and mold slag. The main results revealed that a large amount of liquid slag at the entrance of the mold–strand channel reflowed into the slag pool at the middle of the negative strip period. The phenomenon was more distinct, with an increase in the modification ratio. The modification ratio had no obvious effect on the average thickness of the liquid film at different depths below the meniscus. A modification ratio of 0.5 caused less fluctuation of the transient liquid film. Quantitative prediction of slag consumption indicated that as the modification ratio increased from 0.2 to 0.5 to 0.8, the average values were 0.278, 0.286, and 0.279 kg/m2, respectively. Shell solidification and growth near the meniscus mainly occurred when the mold was descending, which not only depended on the heat flux, but also on the liquid slag flow, the pressure driven by slag rim, and the mold oscillation. Optimization of the modification ratio of nonsinusoidal oscillation could be an alternative to delay growth of the initial shell towards the molten steel. A modification ratio of 0.5 had the least robust shell tip at the meniscus, thereby reducing entrapment of inclusions and bubbles by the shell tip.

scholarly journals Numerical Investigation of Unsteady Molten Steel Flow and Inclusion Behavior in the Tundish in the Ladle Change Period

2014 ◽  
Vol 54 (2) ◽  
pp. 304-310 ◽  
Author(s):  
Koichi Takahashi ◽  
Makoto Ando ◽  
Toshio Ishii
Keyword(s):  
Numerical Investigation ◽  
Molten Steel ◽  
Change Period ◽  
Steel Flow

scholarly journals Numerical analysis of molten steel flow in ladle of RH process.

1989 ◽  
Vol 29 (7) ◽  
pp. 589-595 ◽  
Author(s):  
Ryoji Tsujino ◽  
Junji Nakashima ◽  
Masazumi Hirai ◽  
Ikuo Sawada
Keyword(s):  
Numerical Analysis ◽  
Molten Steel ◽  
Rh Process ◽  
Steel Flow

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.

scholarly journals Numerical Investigation of Effect of Casting Speed on Flow Characteristics of Molten Steel in Multistrand Tundish

2019 ◽  
Vol 59 (7) ◽  
pp. 1250-1258 ◽  
Author(s):  
Fei He ◽  
Haijun Wang ◽  
Zhenghai Zhu
Keyword(s):  
Numerical Investigation ◽  
Molten Steel ◽  
Casting Speed ◽  
Flow Characteristics

Improvement of cleanness of molten steel in the RH process

2008 ◽  
Vol 105 (9) ◽  
pp. 424-427 ◽  
Author(s):  
Jungho Park ◽  
Soochang Kang ◽  
Jongmin Park
Keyword(s):  
Molten Steel ◽  
Rh Process

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
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