Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen Furnace
Basic oxygen furnace (BOF) steelmaking is widely used in the metallurgy field. The slagging reaction is a necessary process that oxidizes C, Mn, Si, P, S, and other impurities and therefore directly affects the quality of the resultant steel. Relevant research has suggested that intensifying the sti...
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MDPI AG
2020-07-01
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| author | Zichao Yin Jianfei Lu Lin Li Tong Wang Ronghui Wang Xinghua Fan Houkai Lin Yuanshun Huang Dapeng Tan |
| author_facet | Zichao Yin Jianfei Lu Lin Li Tong Wang Ronghui Wang Xinghua Fan Houkai Lin Yuanshun Huang Dapeng Tan |
| author_sort | Zichao Yin |
| collection | DOAJ |
| description | Basic oxygen furnace (BOF) steelmaking is widely used in the metallurgy field. The slagging reaction is a necessary process that oxidizes C, Mn, Si, P, S, and other impurities and therefore directly affects the quality of the resultant steel. Relevant research has suggested that intensifying the stirring effect can accelerate the slagging reaction and that the dynamic characteristics of the top blow are the key factor in exploring the related complex physical and chemical phenomena. To address the issue, the standard k-<inline-formula><math display="inline"><semantics><mi>ω</mi></semantics></math></inline-formula> turbulence model and level-set method were adopted in the present work and a fluid dynamics model was developed for a BOF. Accordingly, the slag–metal–gas emulsion interaction and stirring effect were investigated, and the interference mechanism of a multi-nozzle supersonic coherent jet was revealed. Finally, a self-adjustment method based on fuzzy control is proposed for the oxygen lance. The results indicate that the transfer efficiency of jet kinetic energy at the gas–liquid interface is the critical factor for the slagging reaction and that multi-nozzle oxygen lances with a certain twisted angle have important advantages with respect to stirring effects and splashing inhibition. The fuzzy control method predicts that the optimal nozzle twist angle is within the range of 7.2° to 7.8°. The results presented herein can provide theoretical support and beneficial reference information for BOF steelmaking. |
| first_indexed | 2024-03-10T18:13:47Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T18:13:47Z |
| publishDate | 2020-07-01 |
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| series | Applied Sciences |
| spelling | doaj.art-3444f1568ffa4d6b90a279237e13ec542023-11-20T07:52:01ZengMDPI AGApplied Sciences2076-34172020-07-011015510110.3390/app10155101Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen FurnaceZichao Yin0Jianfei Lu1Lin Li2Tong Wang3Ronghui Wang4Xinghua Fan5Houkai Lin6Yuanshun Huang7Dapeng Tan8College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaZhejiang Chendiao Machinery Co. Ltd., Lishui 321404, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaAutomation Engineering Co., Maanshan Iron & Steel Co. Ltd., Maanshan 243000, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaBasic oxygen furnace (BOF) steelmaking is widely used in the metallurgy field. The slagging reaction is a necessary process that oxidizes C, Mn, Si, P, S, and other impurities and therefore directly affects the quality of the resultant steel. Relevant research has suggested that intensifying the stirring effect can accelerate the slagging reaction and that the dynamic characteristics of the top blow are the key factor in exploring the related complex physical and chemical phenomena. To address the issue, the standard k-<inline-formula><math display="inline"><semantics><mi>ω</mi></semantics></math></inline-formula> turbulence model and level-set method were adopted in the present work and a fluid dynamics model was developed for a BOF. Accordingly, the slag–metal–gas emulsion interaction and stirring effect were investigated, and the interference mechanism of a multi-nozzle supersonic coherent jet was revealed. Finally, a self-adjustment method based on fuzzy control is proposed for the oxygen lance. The results indicate that the transfer efficiency of jet kinetic energy at the gas–liquid interface is the critical factor for the slagging reaction and that multi-nozzle oxygen lances with a certain twisted angle have important advantages with respect to stirring effects and splashing inhibition. The fuzzy control method predicts that the optimal nozzle twist angle is within the range of 7.2° to 7.8°. The results presented herein can provide theoretical support and beneficial reference information for BOF steelmaking.https://www.mdpi.com/2076-3417/10/15/5101basic oxygen furnaceslagging reactionslag-metal-gas emulsionsmulti-nozzle oxygen lancesupersonic coherent jetfuzzy control method |
| spellingShingle | Zichao Yin Jianfei Lu Lin Li Tong Wang Ronghui Wang Xinghua Fan Houkai Lin Yuanshun Huang Dapeng Tan Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen Furnace Applied Sciences basic oxygen furnace slagging reaction slag-metal-gas emulsions multi-nozzle oxygen lance supersonic coherent jet fuzzy control method |
| title | Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen Furnace |
| title_full | Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen Furnace |
| title_fullStr | Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen Furnace |
| title_full_unstemmed | Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen Furnace |
| title_short | Optimized Scheme for Accelerating the Slagging Reaction and Slag–Metal–Gas Emulsification in a Basic Oxygen Furnace |
| title_sort | optimized scheme for accelerating the slagging reaction and slag metal gas emulsification in a basic oxygen furnace |
| topic | basic oxygen furnace slagging reaction slag-metal-gas emulsions multi-nozzle oxygen lance supersonic coherent jet fuzzy control method |
| url | https://www.mdpi.com/2076-3417/10/15/5101 |
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