针对某钢厂130 t精炼钢包炉熔池进行水模型实验,在研究混匀时间的同时,选择乳状液作为模拟夹杂物,研究了底吹氩钢包内夹杂物的上浮行为.实验考察指标为混匀时间和夹杂物的去除率.结果表明,底吹气量对混匀时间和夹杂物去除率影响均很显著,综合考虑混匀时间和夹杂物去除率及吹气量对钢液的影响,混匀时间较短,夹杂物去除效果较好,并且对钢液温度及污染影响较小的工艺参数为:双孔吹气,原型吹气量为250 L/min.
Water modeling experiments were carried out for the 200 t refining ladle at a steel plant.Not only the mixing phenomena but also the floating performance of inclusion were studied by choosing emulsion drops simulated as inclusions.The observed parameters of the experiments are the mixing time and the remove ratio of the inclusion.The results show that the flow rate has obviously effect on the mixing time and the remove ratio of the inclusion.Considering the influence of mixing time,removal ratio and bowing rate on the liquid steel,the process parameters satisfying less mixing time,better removal ratio and less effect on steel temperature and contamination are double holes blowing with blowing rate of 250 L/min.
参考文献
| [1] | Krishna Myrtgy G G;Mehrotra S P;Ghosh A .Experimental Investigation of Mixing Phenomena in a Gas Stirred Liquid Bath[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1988,19B(12):839. |
| [2] | Seon-Hyo Kim;Fruehan R J .Physical Modeling of Gas/Liquid Mass Transfer in a Gas Stirred Ladle[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1987,18B(12):673. |
| [3] | Sahai Y;Guthrie R I L .Hydrodynamics of Gas Stirred Melts:Part Ⅰ.Gas/Liquid Coupling[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1982,13(06):193. |
| [4] | 蔡志鹏;魏伟胜 .底吹过程喷射区含气率分布及气液上升速度模型[J].钢铁,1988,23(07):19. |
| [5] | Iguchi M;Hebusi O H;Ueda H .Model Study of Bubble and Liquid-Flow Charaeteristies in a Bottom Blown Bath Under Reduced Pressure[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1996,27B:35. |
| [6] | 郑淑国,朱苗勇.钢包内喷嘴与透气砖吹氩去夹杂水模型研究[J].金属学报,2006(11):1143-1148. |
| [7] | 朱苗勇;萧泽强.钢的精炼过程数学物理模拟[M].北京:冶金工业出版社,1998 |
| [8] | Wang L.;Lee H.G. .Prediction of the Optimum Bubble Size for Inclusion Removal from Molten Steel by Flotation[J].ISIJ International,1996(1):7-16. |
| [9] | Zhang Lifeng;Taniguchi S .Fundamentals of Inclusion and Inclusion Removal in Continuous Casting Tundishes.Removal From Liquid Steel by Attachment to Rising Bubbles[J].Ironmaking and Steelmaking,2001,28(09):55. |
| [10] | 薛正良,王义芳,王立涛,李正邦,张家雯.用小气泡从钢液中去除夹杂物颗粒[J].金属学报,2003(04):431-434. |
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