保护渣黏度对连铸润滑影响的模拟仿真

doi:10.13228/j.boyuan.issn1005-4006.20200143

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Abstract Viscosity of mold flux is an important property to evaluate the lubrication during the continuous casting of steel, and viscosity with proper value is the key to ensure uniform lubrication and heat transfer during continuous casting of steel.Based on the multiphase flow and enthalpy-porous media model, a two-dimensional transient model was established to study the infiltration of liquid flux into the mold-strand gap at the meniscus, and the effect of viscosity on the lubrication was discussed. The measurement shows that with 9% Al₂O₃ addition into mold flux designed especially for the continuous casting of ultra-low carbon steel, the viscosity of mold flux at 1 300 ℃ was increased, and the trend of the viscosity as a function of temperature indicated that the mold flux gradually transformed from crystal to glass type. The prediction shows that as the viscosity increased, the flow speed of liquid flux at meniscus was attenuated, the liquid film thickness and flux consumption were decreased. Moreover, the fluctuation of inflow and the thickness of liquid film varied with no obvious periodic change during the oscillation cycle.

Key words： mold flux continuous casting viscosity lubrication numerical simulation consumption

Received: 27 December 2020

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	Articles by authors
	LU Chun-xiao
	MAO Yu-min
	ZHANG Xu-bin
	WANG Qiang-qiang
	WANG Qian

Cite this article:

LU Chun-xiao,MAO Yu-min,ZHANG Xu-bin等. Effect of viscosity of mold flux on infiltration in steel continuous casting by numerical simulation[J]. CONTINUOUS CASTING, 2021, 40(2): 43-47.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20200143 OR http://www.chinamet.cn/Jweb_lz/EN/Y2021/V40/I2/43

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