Bottom tuyere configuration optimization in 120 t combination blown converter

Zhang Ling; Yu Bo; Zhong Liangcai; Wang Lixin; He Longlong; Weng Li; Li Qiang

doi:10.7513/j.issn.1004-7638.2022.05.020

Volume 43 Issue 5

Nov. 2022

Turn off MathJax

Article Contents

Article Navigation > IRON STEEL VANADIUM TITANIUM > 2022 > 43(5): 136-144

Zhang Ling, Yu Bo, Zhong Liangcai, Wang Lixin, He Longlong, Weng Li, Li Qiang. Bottom tuyere configuration optimization in 120 t combination blown converter[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(5): 136-144. doi: 10.7513/j.issn.1004-7638.2022.05.020

Citation:

Zhang Ling, Yu Bo, Zhong Liangcai, Wang Lixin, He Longlong, Weng Li, Li Qiang. Bottom tuyere configuration optimization in 120 t combination blown converter[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(5): 136-144. doi: 10.7513/j.issn.1004-7638.2022.05.020

Citation:

PDF( 4519 KB)

Bottom tuyere configuration optimization in 120 t combination blown converter

doi: 10.7513/j.issn.1004-7638.2022.05.020

Zhang Ling^{1, 2},
Yu Bo³,
Zhong Liangcai^{1, 2
,
,},
Wang Lixin³,
He Longlong^{1, 2},
Weng Li³,
Li Qiang^{1, 2}

1.
Key Laboratory of Ecological Metallurgy of Multi-metal Symbiosis Ore, Ministry of Education, Northeastern University, Shenyang 110819, Liaoning, China
2.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
3.
Jianlong Fushun New Iron and Steel Plant, Fushun 113001, Liaoning, China

Received Date: 2022-05-09
Publish Date: 2022-11-01

Abstract

Abstract

Physical experiment in a model with a geometric similarity ratio of 1:10 for a 120 t top-bottom combined blown converter based on the similarity theory was conducted in laboratory. The effect of bottom gas flowrate, number and arrangement of bottom tuyeres on the bath mixing was studied. A mathematical model of gas-liquid two-phase flow in the converter at single bottom blowing was established in the simulation. The effect of bottom tuyere configurations on velocity field in molten bath was studied. The results showed that the average mixing time with the optimized configurations of 4, 6 and 8 bottom tuyeres at bottom gas flow rate of 0.534 m³/h and 1.074 m³/h is 28.50, 28.25 s and 27.50 s in the case of single bottom blowing. In the case of combined blowing, the mixing time in the molten bath decreases with increase in bottom gas flow rates with the optimized configuration of 8 bottom tuyeres at top gas flow rate of 122 m³/h under different top lance heights. The velocity fields in the bath with the optimized configurations of 4, 6 and 8 bottom tuyeres were investigated in the mathematical simulation. It is found that less vortex centers of flow fields on horizontal sections and large asymmetry of vortex centers of flow fields on vertical sections can decrease “dead zone” volumes, which can improve the stirring ability of bottom gas and reduce mixing time in molten bath. The “dead zone” volumes in molten bath from the optimized configurations of 4, 6 and 8 bottom tuyeres studied here are 15.44%, 23.56% and 10.30%, respectively.
- converter,
- top and bottom blow,
- bath,
- stirring and mixing,
- fluid flow,
- physical modeling,
- mathematical simulation

FullText(HTML)

References(10)

References

[1]	Yan Guangting, Tang Ping, Zhang Shuyun. Influence of bottom blowing oxygen and bottom tuyeres configuration on mixing characteristics of converter bath[J]. Sichuan Metallurgy, 1990,(1):45−61. (颜广庭, 唐萍, 张淑筠. 底吹氧量及底枪配置对复吹转炉熔池混合特性的影响[J]. 四川冶金, 1990,(1):45−61.
[2]	Yang Wenyuan, Ding Yongliang, Wang Minglin, et al. Water modeling of interaction between jets from multi-nozzle lance and bath in large converter[J]. Iron and Steel, 2004,39(3):16−19. (杨文远, 丁永良, 王明林, 等. 大型转炉多孔喷头射流与熔池作用的水模研究[J]. 钢铁, 2004,39(3):16−19. doi: 10.3321/j.issn:0449-749X.2004.03.004
[3]	Ni Hongwei, Yu Shuren, Qiu Linghui, et al. Cold model study on 90 t top-bottom combined blown converter[J]. Steelmaking, 2002,18(3):39−43. (倪红卫, 喻淑仁, 邱玲慧, 等. 90 t复吹转炉水模实验研究[J]. 炼钢, 2002,18(3):39−43. doi: 10.3969/j.issn.1002-1043.2002.03.010
[4]	Abdul Quiyoom, Ravi Golani, Vikas Singh, et al. Effect of differential flow schemes on gas-liquid flow and liquid phase mixing in a basic oxygen furnace[J]. Chemical Engineering Science, 2017,170(10):777−789.
[5]	Ajmani, Chatterjee. Cold model studies of mixing and mass transfer in steelmaking vessels[J]. Ironmaking & Steelmaking, 2005,32(6):515−527.
[6]	Stišovic T, Koch K. Bottom blowing investigations on a cold model reactor to optimise mixing behaviour in metallurgical processes[J]. Steel Research, 2002,73(9):373−377. doi: 10.1002/srin.200200002
[7]	Lai Z Y, Xie Z, Zhong L C. Influence of bottom tuyere configuration on bath stirring in a top and bottom combined blown converter[J]. ISIJ International, 2008,48(6):793−798. doi: 10.2355/isijinternational.48.793
[8]	Zhong Lingcai, Zhou Xiaobin, Zhu Yingxiong, et al. Bath mixing behavior in a 100 t top-bottom-side blown converter[J]. Journal of Materials and Metallurgy, 2011,10(4):241−243. (钟良才, 周小宾, 朱英雄, 等. 100 t顶底侧吹转炉熔池混匀行为[J]. 材料与冶金学报, 2011,10(4):241−243. doi: 10.3969/j.issn.1671-6620.2011.04.002
[9]	杨晨. 120 t顶底复吹转炉水力学模型优化研究[D]. 鞍山: 辽宁科技大学, 2016. Yang Chen. Optimization of hydraulic model for 120 t on top bottom conbined blown converter [D]. Anshang: University of Science and Technology Liaoning, 2016.
[10]	陈敏. 210 t顶底复吹转炉水模型实验研究[D]. 武汉: 武汉科技大学, 2011. Chen Min. Cold model study 210 t top-bottom combined blown converter [D]. Wuhan: Wuhan University of Science and Technology, 2011.