135 t LF钢包炉底吹氩混匀时间及临界流量的物理模拟

doi:10.13228/j.boyuan.issn1005-4006.20170081

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Abstract Based on a prototype of 135 t LF ladle bottom argon-blowing in a steel plant， the ladle hydraulics model with model and prototype ratio of 1[∶]3.4 was established， the effects of ventilation brick arrangement and argon flow on the mixing time of molten steel were studied. It shows that： under the single blowing process， the mixing time of 0.3 R to 0.4R ventilation brick arrangement is shortest. The mixing time of 0.3R and 0.4R is 42.7 s and 43.3 s respectively. In addition， the scouring effect on the wall is the weakest. Under the double blowing process， the blending effect of the large angle process （≥120°） is more significant than the small angle process. Under 0.5 R-120° ventilation brick arrangement condition， the mixing time is 35.7 s， which is shortest. Under the same flow conditions. The mixing time of the single blowing process is slightly shorter than the double blowing process. Besides， the scouring effect on the wall of double blowing process is weaker than single blowing process owing to the gas-shunting phenomenon. To summarize， the double blowing process should be adopt， the best ventilation plan for the prototype is 0.5 R-120°. The optimum argon flow rate for the single blowing process and double blowing process is 500 L/min and 600 L/min respectively.

Received: 31 July 2017 Published: 16 March 2018

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Cite this article:

DAN Zhong-Hua. Physical simulation of mixing time and critical flow rate of bottom blowing argon in a 135 t LF ladle[J]. , 2018, 37(1): 29-33.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20170081 OR http://www.chinamet.cn/Jweb_lz/EN/Y2018/V37/I1/29