基于PIV技术的结晶器液面波动指数优化

doi:10.13228/j.boyuan.issn1005-4006.20230059

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Abstract For the strand of 1 150 mm×230 mm section size of a Chinese steel plant, there are often problems such as slivers and blisters in the cold rolled sheet, a 0.6-scale water model of slab mold was built, and the casting speed, submerged entry nozzle (SEN) outlet angle and submerged depth were selected to carry out a three-factor three-level orthogonal experiment. Particle image velocimetry (PIV) was used to measure the mold flow field under different operating conditions, the liquid steel flow field and liquid steel flow rate in the mold were obtained, and the influence of different operating conditions on the mold flow field was analyzed by the mold level fluctuation index (F value). The results show that the jet angle of the liquid steel flow and the impact point, impact speed and impact angle of the flow on the narrow surface strand can be obtained through PIV, the characterization of liquid steel flow and level fluctuation in the mold can be analyzed using the F value. In the orthogonal experiment, the influence importance of each factor is casting speed> outlet angle > submerged depth, and the optimal operating conditions are casting speed of 1.5 m/min, SEN angle of -30°, submerged depth of 175 mm. Compared with the current operating conditions, the jet angle and impact depth of the optimized operating conditions increase, the upward flow of molten range gradually increases, the F value decreases and is closer to the target value, the level fluctuation amplitude decreases, the probability of slag entrainment decreases.

Key words： mold level fluctuation particle image velocimetry F value orthogonal experiment

Received: 30 June 2023

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	Articles by authors
	GAO Yu
	WANG Zhendong
	SHAN Qinglin
	ZHANG Junguo
	LU Boxun
	WANG Bin
	CUI Heng

Cite this article:

GAO Yu,WANG Zhendong,SHAN Qinglin等. Optimization of mold level fluctuation index based on particle image velocimetry[J]. CONTINUOUS CASTING, 2023, 42(5): 35-38.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20230059 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I5/35

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