渣-金界面气泡夹带行为数值物理模拟
收稿日期: 2022-05-05
修回日期: 2022-07-28
网络出版日期: 2022-08-29
基金资助
国家自然科学基金项目(51704006);国家自然科学基金项目(51774004)
Physical and Mathematical Simulation on the Bubble Entrainment Behavior at Slag-Metal Interface
Received date: 2022-05-05
Revised date: 2022-07-28
Online published: 2022-08-29
Supported by
National Natural Science Foundation of China(51704006);National Natural Science Foundation of China(51774004)
利用物理模拟和数值模拟研究气泡和熔渣不同物性参数对气泡在渣-金界面夹带量的影响。研究结果表明,影响气泡夹带量和渣-金界面面积的主要因素是气泡直径,其次是渣层密度,渣黏度和界面张力对气泡夹带影响相对较小。气泡初始直径由10 mm增大到16 mm,气泡夹带量增大了7.41倍,渣-金界面面积增量最大值增大3.67倍。渣层密度由2000 kg/m3增大到5000 kg/m3,气泡夹带量增大了62.3%,渣-金界面面积最大值增大了13.1%。渣-金界面张力和黏度增大,气泡夹带量和渣-金界面面积均降低。渣-金界面张力从0.65 N/m增大到1.10 N/m,气泡夹带量减小了30.6%,渣-金界面面积最大值减小6.4%。渣层黏度由0.05 Pa·s增大到2.0 Pa·s时,气泡夹带量降低18.4%,渣-金界面面积最大值减小10.2%。
周小宾 , 赵占山 , 汪万行 , 徐建国 , 岳强 . 渣-金界面气泡夹带行为数值物理模拟[J]. 金属学报, 2023 , 59(11) : 1523 -1532 . DOI: 10.11900/0412.1961.2022.00218
The flow and interaction between slag, metals, and bubbles are very complicated phenomena in metallurgical processes, such as desulfurization in hot metal pretreatment, steelmaking process in a converter, and second refining process. The molten steel or hot metal can be entrained into the slag when a bubble or bubbles flow through the slag-metal interface during the metallurgical process. The bubble entrainment behavior can increase the heat and mass transfer and, in turn, increase the chemical reaction efficiency of the slag-metal interface. Investigating the entrainment behavior helps in understanding the interaction between bubbles and liquid phases. The current study focuses on the effects of bubbles and slag properties on the bubble entrainment behaviors at the slag-metal interface. The results show that the bubble size is the most important factor influencing the entrainment, followed by the slag density. The slag viscosity and interfacial tension of the slag-metal interface show a weaker effect on the entrainment. In particular, the entrainment volume of steel and maximum area of the slag-metal interface increase by 7.41 and 3.67 times when the bubble diameter increased from 10 to 16 mm, respectively. When the slag density increases from 2000 to 5000 kg/m3, the entrainment volume of steel and maximum area of the slag-metal interface increase by 62.3% and 13.1%, respectively. The increasing in slag viscosity and interfacial tension is less affected by slag entrainment and interface area. The entrainment volume of steel and maximum area of the slag-metal interface are decreased by 30.6% and 6.4% when the interfacial tension of the slag-metal interface increases from 0.65 to 1.10 N/m, respectively. Similarly, when the slag viscosity increases from 0.05 to 2.0 Pa·s, the entrainment volume of steel and maximum area of the slag-metal decrease by 18.4% and 10.2%, respectively.
| 1 | Feng J X. Application of desulphurization technique by magnesium injection in molten iron [J]. Met. Mater. Metall. Eng., 2007, 35(4): 21 |
| 冯建新. 铁水喷镁脱硫技术的应用 [J]. 金属材料与冶金工程, 2007, 35(4): 21 | |
| 2 | Wang D G, Cheng N L, Zhou X B. Research on the effect of bottom blowing on bath stirring in a 250 t converter [J]. Chin. J. Process Eng., 2020, 20: 678 |
| 王多刚, 程乃良, 周小宾. 250吨转炉底吹对熔池搅拌的影响研究 [J]. 过程工程学报, 2020, 20: 678 | |
| 3 | Mazumdar D, Dhandapani P, Sarvanakumar R. Modeling and optimisation of gas stirred ladle systems [J]. ISIJ Int., 2017, 57: 286 |
| 4 | Iguchi M, Nakamura K I, Tsujino R. Mixing time and fluid flow phenomena in liquids of varying kinematic viscosities agitated by bottom gas injection [J]. Metall. Mater. Trans., 1998, 29B: 569 |
| 5 | Chen Z P, Zhu M Y, Wen G H, et al. Effect of submerged entry nozzle argon blowing on slab quality [J]. Iron Steel, 2009, 44(7): 28 |
| 陈志平, 朱苗勇, 文光华 等. 连铸板坯浸入式水口吹氩工艺研究 [J]. 钢铁, 2009, 44(7): 28 | |
| 6 | Li B K, Yin H B, Zhou C Q, et al. Modeling of three-phase flows and behavior of slag/steel interface in an argon gas stirred ladle [J]. ISIJ Int., 2008, 48: 1704 |
| 7 | Wei G S, Zhu R, Cheng T, et al. Study on the impact characteristics of coherent supersonic jet and conventional supersonic jet in EAF steelmaking process [J]. Metall. Mater. Trans., 2018, 49B: 361 |
| 8 | Zhao C, Chen W, Zhang L F, et al. Numerical simulation of multiphase flow in converter top blowing process [J]. China Metall., 2018, 28(suppl.1) : 1 |
| 赵 冲, 陈 威, 张立峰 等. 转炉顶吹过程多相流数值模拟 [J]. 中国冶金, 2018, 28(): 1 | |
| 9 | De Jesús Villela-Aguilar J, Ramos-Banderas J á, Hernández-Bocanegra C A, et al. Optimization of the mixing time using asymmetrical arrays in both gas flow and injection positions in a dual-plug ladle [J]. ISIJ Int., 2020, 60: 1172 |
| 10 | Hibbeler L C, Liu R, Thomas B G. Review of mold flux entrainment mechanisms and model investigation of entrainment by shear-layer instability [A]. Proceedings of the 7th ECCC [C]. Dusseldorf, Germany, 2011: 1 |
| 11 | Yu H Q, Zhu M Y. The interfacial behavior of molten steel and liquid slag in slab continuous casting mold with electromagnetic brake and argon gas injection [J]. Acta Metall. Sin., 2008, 44: 1141 |
| 于海岐, 朱苗勇. 板坯结晶器电磁制动和吹氩过程的钢/渣界面行为 [J]. 金属学报, 2008, 44: 1141 | |
| 12 | Yang H L, He P, Zhai Y C. Removal behavior of inclusions in molten steel by bubble wake flow based on water model experiment [J]. ISIJ Int., 2014, 54: 578 |
| 13 | Li B, Lu H B, Zhong Y B, et al. Numerical simulation for the influence of EMS position on fluid flow and inclusion removal in a slab continuous casting mold [J]. ISIJ Int., 2020, 60: 1204 |
| 14 | Han Z J, Holappa L. Formation of metal droplets from gas bubbles bursting on iron melt [J]. Steel Res., 2001, 72: 434 |
| 15 | Han Z J, Holapp L. Bubble bursting phenomenon in gas/metal/slag systems [J]. Metall. Mater. Trans., 2003, 34B: 525 |
| 16 | Han Z J, Holappa L. Characteristics of iron entrainment into slag due to rising gas bubbles [J]. ISIJ Int., 2003, 43: 1698 |
| 17 | Ekeng?rd J, Andersson A M T, J?nsson P G. Distribution of metal droplets in top slags during ladle treatment [J]. Ironmaking Steelmaking, 2008, 35: 575 |
| 18 | Yoshida H, Liu J, Kim S J, et al. Influence of the interfacial tension on the droplet formation by bubble rupture in Sn(Te) and salt system [J]. ISIJ Int., 2016, 56: 1902 |
| 19 | Song D Y, Maruoka N, Gupta G S, et al. Influence of bottom bubbling rate on formation of metal emulsion in Al-Cu alloy and molten salt system [J]. ISIJ Int., 2012, 52: 1018 |
| 20 | Reiter G, Schwerdtfeger K. Observations of physical phenomena occurring during passage of bubbles through liquid/liquid interfaces [J]. ISIJ Int., 1992, 32: 50 |
| 21 | Greene G A, Chen J C, Conlin M T. Onset of entrainment between immiscible liquid layers due to rising gas bubbles [J]. Int. J. Heat Mass Trans., 1988, 31: 1309 |
| 22 | Zhao H L, Wang J Q, Zhang W L, et al. Bubble motion and interfacial phenomena during bubbles crossing liquid-liquid interfaces [J]. Processes, 2019, 7: 719 |
| 23 | Singh K K, Gebauer F, Bart H J. CFD Simulation of the phenomenon of passage of a bubble through the interface between two initially quiescent liquids [J]. Chem. Ing. Tech., 2015, 87: 1047 |
| 24 | Natsui S, Takai H, Kumagai T, et al. Multiphase particle simulation of gas bubble passing through liquid/liquid interfaces [J]. Mater. Trans., 2014, 55: 1707 |
| 25 | Boyer F, Lapuerta C. Study of a three component Cahn-Hilliard flow model [J]. ESAIM: Math. Model. Numer. Anal., 2006, 40: 653 |
| 26 | Boyer F, Lapuerta C, Minjeaud S, et al. Cahn-Hilliard/Navier-Stokes model for the simulation of three-phase flows [J]. Transp. Porous Med., 2010, 82: 463 |
| 27 | Chen J X. Handbook of Steelmaking Data and Diagrams [M]. 2nd Ed., Beijing: Metallurgical Industry Press, 2010: 275 |
| 陈家祥. 炼钢常用图表数据手册 [M]. 第 2版, 北京: 冶金工业出版社, 2010: 275 |
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