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| Thermal analysis of walls in a new-type billet caster tundish with avacuum shell |
| Jian-bo Xie1,2,Jian-an Zhou1,2,*,Lan-hua Zhou3,Bao Wang1,2,Hua Zhang1,2 |
1 State Key Laboratory of Refractories & Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, Hubei, China
2 Key Laboratory of Ferrous Metallurgy and Resources Utilization, Ministry of Education, Wuhan University of Science & Technology, Wuhan 430081, Hubei, China
3 School of Resources and Environmental Engineering, Panzhihua University, Panzhihua 617000, Sichuan, China |
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Abstract To reduce thermal loss from molten steel in a tundish during continuous casting production, a new tundish fabricated by welding radiation-proof steel plates onto the steel plates of the exterior walls of a billet caster tundish was proposed. This new tundish was used to investigate the effect of pressures inside the vacuum chamber on the uniformity of the temperature of molten steel and the thermal conditions of the vacuum layer. The results show that the conversion radiation coefficient is not sensitive to pressure and its value at high temperatures is merely 1��5 times greater than that at low temperatures. Pressure is the key factor affecting additional factor of conversion convection. This factor is more than 100 times greater at 105 Pa than at 102 Pa, and the temperature at inner points at 102 Pa is, on average, 4 K higher than that at 105 Pa. Meanwhile, the local temperature difference of the inlet at 102 Pa is 1 K higher than that at 105 Pa. Thus, the proposed vacuum billet caster tundish can achieve low superheat teeming of steel because of the thermal preservation capability of the vacuum, which helps to reduce the tapping temperature and improve the uniformity of the temperature of steel.
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Received: 20 June 2016
Published: 12 May 2017
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| Fund:National Natural Science Foundation of China and Shanghai Baosteel |
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Corresponding Authors:
xie jian-bo
E-mail: xjbhbwust@163.com
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2017, Vol. 24 
