Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual Plugs
The cleanness of steel has always been a big problem for secondary refining. In this work, a new method, which is coupled with slot and porous plugs, is proposed to improve the cleanness in steel. Water experiments and numerical simulations were performed to study this effect. Results revealed that...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/1/162 |
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| author | Xianglong Li Shaoyan Hu Deyong Wang Tianpeng Qu Guangjun Wu Pei Zhang Qi Quan Xingzhi Zhou Zhixiao Zhang |
| author_facet | Xianglong Li Shaoyan Hu Deyong Wang Tianpeng Qu Guangjun Wu Pei Zhang Qi Quan Xingzhi Zhou Zhixiao Zhang |
| author_sort | Xianglong Li |
| collection | DOAJ |
| description | The cleanness of steel has always been a big problem for secondary refining. In this work, a new method, which is coupled with slot and porous plugs, is proposed to improve the cleanness in steel. Water experiments and numerical simulations were performed to study this effect. Results revealed that when using slot-porous plugs, the flow field was obviously asymmetrical, and the circulation flow was pushed towards the porous side. Then, the removement of inclusions was increased to about 22.7% percent, comparing with traditional two-slot bottom stirring and reducing the dead zone area near the bottom of the ladle; however, the mixing time delay was 16%, comparing with traditional plugs. Then, in order to explain the reason for these phenomena, we established a mathematical model through large eddy simulation and discrete particle modeling (DPM). Results shows that the asymmetry flow field awoke the recirculation flow downwards after using slot-porous plugs, which would homogenize the flow at the bottom, promoting floating in steel. What is more, the velocity near the free surface was lowered; therefore, it could also stabilize the surface velocity as well, which is also beneficial for removing inclusions as well. |
| first_indexed | 2024-03-10T00:55:51Z |
| format | Article |
| id | doaj.art-881964f2605f4576833774ad35dcaed9 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T00:55:51Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-881964f2605f4576833774ad35dcaed92023-11-23T14:43:17ZengMDPI AGMetals2075-47012022-01-0112116210.3390/met12010162Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual PlugsXianglong Li0Shaoyan Hu1Deyong Wang2Tianpeng Qu3Guangjun Wu4Pei Zhang5Qi Quan6Xingzhi Zhou7Zhixiao Zhang8School of Iron and Steel, Soochow University, Suzhou 215137, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215137, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215137, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215137, ChinaLaiwu Technique Center, Shandong Iron & Steel Group Company Limited, Jinan 271104, ChinaLaiwu Technique Center, Shandong Iron & Steel Group Company Limited, Jinan 271104, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215137, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215137, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215137, ChinaThe cleanness of steel has always been a big problem for secondary refining. In this work, a new method, which is coupled with slot and porous plugs, is proposed to improve the cleanness in steel. Water experiments and numerical simulations were performed to study this effect. Results revealed that when using slot-porous plugs, the flow field was obviously asymmetrical, and the circulation flow was pushed towards the porous side. Then, the removement of inclusions was increased to about 22.7% percent, comparing with traditional two-slot bottom stirring and reducing the dead zone area near the bottom of the ladle; however, the mixing time delay was 16%, comparing with traditional plugs. Then, in order to explain the reason for these phenomena, we established a mathematical model through large eddy simulation and discrete particle modeling (DPM). Results shows that the asymmetry flow field awoke the recirculation flow downwards after using slot-porous plugs, which would homogenize the flow at the bottom, promoting floating in steel. What is more, the velocity near the free surface was lowered; therefore, it could also stabilize the surface velocity as well, which is also beneficial for removing inclusions as well.https://www.mdpi.com/2075-4701/12/1/162ladle refininginclusionslot plugporous plugLES-DPM model |
| spellingShingle | Xianglong Li Shaoyan Hu Deyong Wang Tianpeng Qu Guangjun Wu Pei Zhang Qi Quan Xingzhi Zhou Zhixiao Zhang Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual Plugs Metals ladle refining inclusion slot plug porous plug LES-DPM model |
| title | Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual Plugs |
| title_full | Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual Plugs |
| title_fullStr | Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual Plugs |
| title_full_unstemmed | Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual Plugs |
| title_short | Inclusion Removements in a Bottom-Stirring Ladle with Novel Slot-Porous Matched Dual Plugs |
| title_sort | inclusion removements in a bottom stirring ladle with novel slot porous matched dual plugs |
| topic | ladle refining inclusion slot plug porous plug LES-DPM model |
| url | https://www.mdpi.com/2075-4701/12/1/162 |
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