高拉速小方坯结晶器热流密度模型的开发及应用

doi:10.13228/j.boyuan.issn1005-4006.20230045

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Abstract As a key component of continuous casting equipment, mould plays a vital role in high speed continuous casting. By developing a calculation model for average heat flux of mould, the masses and heat transfer quantity of solidified shell, mushy zone area and molten steel area of control unit in mould was calculated, and then the average heat flux of mould is obtained. The accuracy of the model is verified by the actual production parameters of low casting speed and numerical simulation analysis too. Under the condition of high casting speed, the results show that for 160 mm×160 mm billet, when the effective mould length is 900 mm and the casting speed is 6 m/min, and the solidified shell thickness at the exit of the mould reaches 10 mm, the average heat flux of the mould should be 4 200 kW/m²; Taking the heat flux calculated by the model as the boundary condition, the solidification state of molten steel in the mould was simulated by finite element simulation, and the calculation results showed that the thickness of solidified shell at the exit of the mould was 10 mm. According to the heat flux obtained from the average heat flux calculation model, combined with the forced convection heat transfer model in the tube, four different mould cooling structures were designed and their convection heat transfer coefficients were calculated. Based on the calculated convective heat transfer coefficient, the heat flux of the mould for the four types of cooling structure is calculated, and then the optimal solution for high casting speed are obtained.

Key words： mould high casting speed heat flux finite element simulation cooling structure

Received: 01 June 2023

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	Articles by authors
	XIANG Hongxue
	HAN Limin
	XIA Fangyong
	WU Guoping

Cite this article:

XIANG Hongxue,HAN Limin,XIA Fangyong等. Development and application of heat flux model of high casting speed billet mould[J]. CONTINUOUS CASTING, 2023, 42(5): 21-27.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20230045 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I5/21

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