基于热流密度分布模型的连铸倒角结晶器温度分布研究  

Study of temperature distribution of continuous casting chamfer mold based on heat flux distribution model

作　　者：宋景欣 张发斌[2] SONG Jingxin;ZHANG Fabin(Steelmaking Department of R&D Center for Meisteel of Bao Steel Central Research Institute,Nanjing 210039,China;Steelmaking Plant of Shanghai Meishan Iron&Steel Co.,Ltd.,Baosteel,Nanjing 210039,China)

机构地区：[1]宝钢股份中央研究院梅钢技术中心,江苏南京210339 [2]宝钢股份上海梅山钢铁股份有限公司炼钢厂,江苏南京210039

出　　处：《炼钢》2019年第6期35-40,51,共7页Steelmaking

摘　　要：基于热流密度分布模型,建立了全弧形板坯连铸机倒角结晶器窄面冷却水流动和铜板传热耦合的数学模型。采用多元回归的方法拟合得到描述连铸结晶器热流密度对结晶器高度的函数表达式。铜板表面沿拉坯方向的热流密度呈非线性分布,弯月面附近的热流密度先急剧增加然后迅速减小,在距离弯月面0.1 m处的热流密度达到最大值。模型计算结果表明,在结晶器距上口150~200 mm的铜板表面温度最高达到608~678 K,低于723 K的铬锆铜再结晶软化温度;尽管该区域铜板水缝的最高表面温度近420 K,但不影响整体传热。计算的铜板温度与热电偶测量值相吻合。A mathematical model for the coupling of cooling water flow and heat transfer of copper narrow face in arc chamfer mold for slab continuous casting was established based on the heat flux distribution model. The expression for describing the heat flux distribution along the height of the mold were obtained by means of multiple regression fitting in the study.The heat flux distribution of copper hot surface along the casting direction are non-linear. The heat flux near meniscus increases first and then decrease dramatically, which reaches maximum value at 0.1 m from the meniscus.The results of the calculation show that the surface temperature of the copper plate in the 150~200 mm range from the mold top reaches the highest 608~678 K, and is lower than that of the 723 K chrome-zirconium copper recrystallization softening temperature.Although the maximum temperature of the copper plate water slot surface is nearly 420 K, it does not affect the overall heat transfer.The calculated copper plate temperatures agree with the measured values of thermocouples.

关 键 词：结晶器 数值模拟 温度场 热流密度 

分 类 号：TF777.1[冶金工程—钢铁冶金]