汽雾冷却条件下转炉炉体瞬态温度场
The Distributions and Variations of the Instant-temperature-field of BOF During Spraying Cooling
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摘要: 通过有限元方法,对汽雾冷却条件下大型转炉炉体瞬态温度场进行了三维有限元仿真分析及宝钢300 t大型转炉热电偶数据实测,研究了该条件下炉体瞬态温度场的分布及变化规律.实测的炉壳温度及其变化规律与有限元仿真结果吻合较好,证实了炉体瞬态温度场有限元分析的可信性.研究结果表明,汽雾冷却条件下炉壳温度呈锯齿形波动(降温速度快,升温较慢),平均降温速度为2~2.5℃/min.运用汽雾冷却技术,可将炉壳温度控制在材料热蠕变温度(约400℃)以下,有效抑制了炉壳热蠕变变形.Abstract: The distributions and variations of the instant-temperature-field of BOF during spray cooling have been studied.The instant-temperature-field FEA model for the converter has been established.Compared with the measured thermocouple data from 300 t Furnace of Bao Steel.FEA model reliability has been validated.It is found that the shell temperature line is a zigzag line:it goes down fast, then goes up slowly. The average cooling velocity is 2~2.5℃/min.With spraying cooling system, the shell temperature can be controlled under material's creeping temperature(about 400℃).
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