Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow rates
Lime, as one of the main components of foam slag generation, is often put into the molten pool in the form of lumps, and there are problems such as slower melting and difficulties in deep dephosphorization. This study proposes a central tubular lance design to enhance molten bath dynamics and dephos...
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Elsevier
2025-09-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025020791 |
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| author | Ceng Li Guangsheng Wei Rong Zhu Fuhai Liu Chengjin Han Linghui Meng |
| author_facet | Ceng Li Guangsheng Wei Rong Zhu Fuhai Liu Chengjin Han Linghui Meng |
| author_sort | Ceng Li |
| collection | DOAJ |
| description | Lime, as one of the main components of foam slag generation, is often put into the molten pool in the form of lumps, and there are problems such as slower melting and difficulties in deep dephosphorization. This study proposes a central tubular lance design to enhance molten bath dynamics and dephosphorization efficiency. The dual-function configuration maintains oxygen jet impact velocity while injecting lime powder via high-speed gas-solid jets toward the slag-metal interface, optimizing flux utilization efficiency. Numerical modeling of shrouding supersonic gas-solid injection reveals: (1) The jet length of the 25-mm insertion depth nozzle measures approximately 1.6 times that of the 5-mm configuration, with gas-phase velocity attenuation rates decreasing as powder flow increases; (2) Increased insertion depth inversely enhances circumfluent oxygen jet velocity, peaking at 483.2 m/s with 15-mm insertion; central pipe powder primarily affects axial velocity magnitude while exerting minimal impact on circumfluent oxygen jet speed; (3) The region of high TKE is directly proportional to the depth of insertion of the the center pipe and inversely proportional to the rate of powder injection into the the center pipe. These findings will provide a certain theoretical basis for the industrial test of supersonic gas-solid injection of lime powder in EAF, which is of significance for the less-slag efficient smelting of the Tweed iron EAF. |
| format | Article |
| id | doaj-art-7f8cc7aca29c46b4a322fcb8211ba3cd |
| institution | DOAJ |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-7f8cc7aca29c46b4a322fcb8211ba3cd2025-08-20T02:44:47ZengElsevierResults in Engineering2590-12302025-09-012710600710.1016/j.rineng.2025.106007Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow ratesCeng Li0Guangsheng Wei1Rong Zhu2Fuhai Liu3Chengjin Han4Linghui Meng5University of Science and Technology Beijing, Institute for Carbon Neutrality, Beijing 100083, ChinaUniversity of Science and Technology Beijing, Institute for Carbon Neutrality, Beijing 100083, China; State Key Laboratory of Advance`d Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110000, China; Corresponding author: Guangsheng Wei. Tex: 0086-010-18210986009.University of Science and Technology Beijing, Institute for Carbon Neutrality, Beijing 100083, China; State Key Laboratory of Advance`d Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; Institute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang, 110000, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 100083, China; Parallel corresponding author: Fuhai Liu. Tex: 0086-010-17601642727.University of Science and Technology Beijing, Institute for Carbon Neutrality, Beijing 100083, ChinaUniversity of Science and Technology Beijing, Institute for Carbon Neutrality, Beijing 100083, ChinaLime, as one of the main components of foam slag generation, is often put into the molten pool in the form of lumps, and there are problems such as slower melting and difficulties in deep dephosphorization. This study proposes a central tubular lance design to enhance molten bath dynamics and dephosphorization efficiency. The dual-function configuration maintains oxygen jet impact velocity while injecting lime powder via high-speed gas-solid jets toward the slag-metal interface, optimizing flux utilization efficiency. Numerical modeling of shrouding supersonic gas-solid injection reveals: (1) The jet length of the 25-mm insertion depth nozzle measures approximately 1.6 times that of the 5-mm configuration, with gas-phase velocity attenuation rates decreasing as powder flow increases; (2) Increased insertion depth inversely enhances circumfluent oxygen jet velocity, peaking at 483.2 m/s with 15-mm insertion; central pipe powder primarily affects axial velocity magnitude while exerting minimal impact on circumfluent oxygen jet speed; (3) The region of high TKE is directly proportional to the depth of insertion of the the center pipe and inversely proportional to the rate of powder injection into the the center pipe. These findings will provide a certain theoretical basis for the industrial test of supersonic gas-solid injection of lime powder in EAF, which is of significance for the less-slag efficient smelting of the Tweed iron EAF.http://www.sciencedirect.com/science/article/pii/S2590123025020791Shrouding supersonic gas-solid injectionCentral tubular lanceLime powder |
| spellingShingle | Ceng Li Guangsheng Wei Rong Zhu Fuhai Liu Chengjin Han Linghui Meng Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow rates Results in Engineering Shrouding supersonic gas-solid injection Central tubular lance Lime powder |
| title | Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow rates |
| title_full | Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow rates |
| title_fullStr | Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow rates |
| title_full_unstemmed | Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow rates |
| title_short | Characterization of shrouding supersonic gas-solid jet with different center pipe insertion depths and powder flow rates |
| title_sort | characterization of shrouding supersonic gas solid jet with different center pipe insertion depths and powder flow rates |
| topic | Shrouding supersonic gas-solid injection Central tubular lance Lime powder |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025020791 |
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