Thermal analysis of walls in a new-type billet caster tundish with a vacuum shell

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Jian-bo Xie , Jian-an Zhou , Lan-hua Zhou , Bao Wang , Hua Zhang
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引用次数: 1

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.

新型真空壳坯连铸机中间包壁热分析
为了减少连铸生产中中间包内钢水的热损失,提出了一种将防辐射钢板焊接到小方坯连铸机中间包外壁钢板上的新型中间包。利用该中间包研究了真空室内压力对钢液温度均匀性和真空层热状态的影响。结果表明,转换辐射系数对压力不敏感,高温时的转换辐射系数仅为低温时的1.5倍。压力是影响转换对流附加系数的关键因素。这个因子在105 Pa时比在102 Pa时大100多倍,102 Pa时内部各点的温度平均比105 Pa时高4 K。同时,入口在102 Pa时的局部温差比105 Pa时大1 K。因此,真空小方坯连铸机中间包利用真空的保温能力,可以实现钢的低过热度充盈,有利于降低出钢温度,提高钢的温度均匀性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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