基于紊流射流理论的连铸结晶器液面波动

doi:10.13228/j.boyuan.issn0449-749x.20160253

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Abstract Level fluctuation in the mold has great influence on the quality of continuous casting slabs. In order to study the regularity of level fluctuation in the mold，prevent slag entrapment and enhance slab quality，based on the theory of turbulent submerged jet，a theoretical model was constructed to study the flow velocity and the position of impingement point when the flow jet impacted on the narrow face in the mold. An analytical formula was derived to describe the level fluctuation index whose calculated value was later compared with that of the experiment and the result verified the correctness of the established theoretical model. Numerical simulation was applied to investigate the wave under various level fluctuation indexes. It shows that the error between the theoretical value and experimental result ranged from －4% to 2.5%，which could be adopted to evaluate the intensity of level fluctuation in mold. According to the established theoretical model，1.4 m/min was the best casting speed for mold with cross section of 1 000 mm×130 mm. This research is of theoretical significance in the prediction of surface wave and can provide practical guidance in the slab continuous casting process.

Key words： continuous casting mold liquid level fluctuation index F number turbulent submerged jet

Received: 12 June 2016 Published: 10 March 2017

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	MENG Zi-Yao
	JIN Xin

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MENG Zi-Yao,JIN Xin. Level fluctuation in continuous casting mold based on theory of turbulent submerged jet[J]. Iron and Steel, 2017, 52(3): 42-48.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20160253 OR http://www.chinamet.cn/Jweb_gt/EN/Y2017/V52/I3/42

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