|
|
|
| Physical and numerical investigation on fluid flow and inclusion removal behavior in a single-strand tundish |
| Qi Quan1, Zhi-xiao Zhang1, Tian-peng Qu1, Xiang-long Li1, Jun Tian1, De-yong Wang1 |
| 1 School of Iron and Steel, Soochow University, Suzhou 215137, Jiangsu, China |
|
|
|
|
Abstract Aiming at the problem that the existence of inclusions in the tundish continuous casting process can easily lead to quality defects of the slab, the stainless steel continuous casting tundish was taken as the research object. The effects of flow control device, inclusion density and inclusion size on the mixing characteristics of molten steel and inclusion behavior in tundish were studied. The results showed that compared with the tundish without flow control device, the average residence time of molten steel was prolonged by about 49 s, the dead zone volume fraction was reduced by 8.93%, and the piston fluid integral rate was increased by 12.68%. In the turbulence inhibitor (TI) tundish with weir–dam combination, the removal rate of inclusions with a density of 2700 kg m-3 and a particle size of 5 lm is 63.32%, while the removal rate of large inclusions with a density of 150 μm could reach 89.04%. When the inclusion particle size was 10–50 μm and the density was 2700–4500 kg m-3, the effect of inclusion density on inclusion removal rate was small. At the same time, when weir–dam combination TI tundish was set, the inclusions were mainly limited to the slag–metal interface of the first and second chambers of the tundish. The removal rate of inclusions in the first chamber was generally improved, with 10 μm inclusions accounting for 47.67% and 150 μm inclusions accounting for 60.69%. Furthermore, it has the best effect on the removal of small-size inclusions, especially those less than 70 μm.
|
|
|
|
|
|
| Cite this article: |
|
Qi Quan,Zhi-xiao Zhang,Tian-peng Qu, et al. Physical and numerical investigation on fluid flow and inclusion removal behavior in a single-strand tundish[J]. Journal of Iron and Steel Research International, 2023, 30(6): 1182-1198.
|
|
|
|
| [1] |
D. Fuchs, T. Tobie, K. Stahl. Challenges in determination of microscopic degree of cleanliness in ultra-clean gear steels[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(10): 1583-1600. |
| [2] |
Ru-ming Geng, Jing Li, Cheng-bin Shi. Influence of cerium treatment on inclusion modification and as-cast microstructure of high-strength low-alloy steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(10): 1659-1668. |
| [3] |
Hai-jun Wang, Rui Xu, Hai-tao Ling, Wei Zhong, Li-zhong Chang, Sheng-tao Qiu. Numerical simulation of fluid flow and alloy melting in RH process for electrical steels[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(09): 1423-1433. |
| [4] |
Yong-bo Peng, Cheng-song Liu, Ling Yang, Song-wei Hou, Ri-jin Cheng, Hua Zhang, Hong-wei Ni. Improving cleanliness of 30Cr2Ni4MoV low-pressure rotor steel by CaO–SiO2–MgO–Al2O3 slag refining[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(09): 1434-1445. |
| [5] |
Wei-sheng Wang, Hang-yu Zhu, Ming-ming Song, Jian-li Li, Zheng-liang Xue. Effect of ferromanganese additions on non-metallic inclusion characteristics in TRIP steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(09): 1464-1473. |
| [6] |
Qiang Yue ,, · Zeng Hu · Zhao-yang Wu, · Hong-ming Long , · Qing-min Meng. Visualization of collision and aggregation behavior of particles simulating movement of inclusions in molten steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2018, 25(2): 173-180. |
|
|
|
|
2023, Vol. 30 
