全氢罩式炉退火过程中钢卷温度场计算模型

doi:10.13228/j.boyuan.issn0449-749x.20200251

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Abstract Aiming at the phenomenon of product quality problems due to the large temperature difference between the hot spots and cold spots of the steel coil,and the long holding time during the annealing process of a full hydrogen bell annealing furnace unit of a certain plant,the heat transfer mathematical model of the unit in the annealing process is established. A correction factor is added to the thermal conductivity and convection heat transfer coefficient of the steel coil,and the processing method of each coefficient is studied. Through a large number of actual data corrections,a better correction factor is obtained. Using the finite difference method to solve the mathematical model,compared with the measured data,the results show that the error of 92% of the temperature points in the calculated value of hot spot temperature is below 5.12%,and the error of 90% of the temperature points in the calculated value of cold spot temperature is below 5.05%. This shows that the mathematical model and calculation method are reliable and can be used for predictive analysis of the temperature field during the annealing process of the plant's full-hydrogen bell furnace unit,which has certain guiding significance for the optimization of the annealing schedule.

Key words： full hydrogen bell annealing furnace temperature field of steel coil finite difference method correction factor annealing

Received: 12 May 2020

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	LIANG Peng-wei
	DONG Zhi-kui
	JIAO Yun-jing
	XIE Xing-hua

Cite this article:

LIANG Peng-wei,DONG Zhi-kui,JIAO Yun-jing等. Calculation model of steel coil temperature field in annealing process of full hydrogen bell furnace[J]. Iron and Steel, 2021, 56(2): 99-104.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200251 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I2/99

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