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| Numerical simulation of influence of bottom blowing gas supply mode on converter mixing effect |
| XUE Rui1,2, ZHANG Yan-chao1,2, ZHANG Cai-jun1,2, WANG Chong-jun3, LIU Zhi-yuan3 |
1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063000, Hebei, China;
2. Hebei Engineering Research Center of High Quality Steel Continuous Casting, Tangshan 063000, Hebei, China;
3. Steelmaking Department, Tangshan Heavy Plate Co., Ltd., Tangshan 063210, Hebei, China |
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Abstract By means of numerical simulation, taking a 300 t converter in a steel mill in the north as the prototype, a three-dimensional model of the bottom blowing converter was established. The effect of argon blowing at the converter bottom on the mixing effects of converter under the non-uniform gas supply system was studied, and the design scheme was optimized. The results showed that with the increase of bottom blowing argon flow rate, the average velocity and the average turbulent kinetic energy in the molten pool increased, and the proportion of the weak flow zone decreased, but the proportion of dead zone decreases less. When the argon flow rate of a single plug brick was 440 m3/h, the average velocity of the flow distribution ratio of 1∶1, 2∶1, 3∶1 and 4∶1 was 0.189, 0.204, 0.167 and 0.168 m/s, respectively. And the dead zone ratio was 17.5%, 11.60%, 23.53% and 20.23%, respectively. The mixing effect of converter was the best when the flow distribution ratio was 2∶1, followed by 1∶1 and 4∶1, and the worst was when the distribution ratio was 3∶1.
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Received: 27 August 2019
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| [1] |
陈家祥. 钢铁冶金学(炼钢部分)[M]. 北京: 冶金工业出版社, 1990.
|
| [2] |
Jung Sung Mo, Rhee Chang Hee, Min Dongjoon.Thermodynamic properties of manganese oxide in BOF slags[J]. ISIJ International, 2002,42(1):63.
|
| [3] |
Matti Juhani Luomala, Timo Matti Juhani Fabritius, Esa Olavi Virtanen. Splashing and spitting behaviour in the combined blown steelmaking converter[J]. ISIJ International, 2002,42(9):944.
|
| [4] |
郑力宁, 皇祝平, 佟溥翘, 等. 宏发炼钢厂180 t转炉复吹技术优化改造[J]. 钢铁, 2008, 43(8):98.
|
| [5] |
孙亮. 迁钢转炉复吹的进步[J]. 中国冶金, 2018, 28(5):47.
|
| [6] |
杨文远, 崔健, 蒋晓放, 等. 大型转炉复吹技术的研究[J]. 钢铁, 2011, 46(5):1.
|
| [7] |
杨文远, 李林, 彭小艳, 等. 转炉铁水脱磷预处理水模试验[J]. 钢铁, 2015, 50(9):34.
|
| [8] |
李建新, 郝旭东, 仇圣桃, 等. 复吹转炉多功能法脱磷工艺[J]. 工程科学学报, 2009, 31(8):970.
|
| [9] |
于鹏飞, 刘小亮, 曾加庆, 等. 转炉底吹元件非均衡供气搅拌的冷态水模拟[J]. 钢铁, 2018, 53(6):39.
|
| [10] |
李姣, 于会香, 王新华, 等. 转炉底吹枪优化布置的数值模拟[J]. 钢铁, 2018, 53(2):32.
|
| [11] |
娄文涛, 李勇, 朱苗勇. 顶底复吹转炉内气液两相流行为的数值模拟[J]. 过程工程学报, 2011, 11(6):926.
|
| [12] |
刘小亮, 曾加庆, 马登, 等. 转炉底吹供气方式对熔池搅拌的影响[J]. 钢铁研究学报, 2017,29(12):990.
|
| [13] |
Launder B E, Spalding D B. Lectures in Mathematical Models of Turbulence [M].London: Academic Press, 1972.
|
| [14] |
唐宏伟. 70吨提钒转炉复吹工艺数理模拟研究[D]. 沈阳:东北大学, 2014.
|
| [15] |
蔡俊,曾加庆,梁强.复吹转炉顶吹枪位与非均衡底吹搅拌的水模拟[J].中国冶金, 2019, 29(10):26.
|
|
|
|
2020, Vol. 30 
