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冷却工艺对薄板坯结晶器传热的影响

刘增勋 张路平 肖鹏程 张朝阳 朱立光

刘增勋, 张路平, 肖鹏程, 张朝阳, 朱立光. 冷却工艺对薄板坯结晶器传热的影响[J]. 钢铁钒钛, 2022, 43(4): 150-157. doi: 10.7513/j.issn.1004-7638.2022.04.023
引用本文: 刘增勋, 张路平, 肖鹏程, 张朝阳, 朱立光. 冷却工艺对薄板坯结晶器传热的影响[J]. 钢铁钒钛, 2022, 43(4): 150-157. doi: 10.7513/j.issn.1004-7638.2022.04.023
Liu Zengxun, Zhang Luping, Xiao Pengcheng, Zhang Zhaoyang, Zhu Liguang. Influence of cooling process on heat transfer of thin slab mold[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 150-157. doi: 10.7513/j.issn.1004-7638.2022.04.023
Citation: Liu Zengxun, Zhang Luping, Xiao Pengcheng, Zhang Zhaoyang, Zhu Liguang. Influence of cooling process on heat transfer of thin slab mold[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 150-157. doi: 10.7513/j.issn.1004-7638.2022.04.023

冷却工艺对薄板坯结晶器传热的影响

doi: 10.7513/j.issn.1004-7638.2022.04.023
基金项目: 国家自然科学基金资助项目(51904107);河北省自然科学基金优秀青年科学基金资助项目(E2020209005);河北省高等学校科学技术研究资助项目(BJ2019041)
详细信息
    作者简介:

    刘增勋(1966—),男,博士,教授,主要从事钢铁冶金相关研究,E-mail:liuzengxun@ncst.edu.cn

    通讯作者:

    肖鹏程(1985—),男,博士,副教授,主要从事连铸相关研究,E-mail:xiaopc@ncst.edu.cn

  • 中图分类号: TF777

Influence of cooling process on heat transfer of thin slab mold

  • 摘要: 为揭示高速连铸结晶器铸坯-铜壁-冷却水体系的传热机制,建立了FTSC结晶器内铸坯-铜壁-冷却水三维流-固-热耦合数值模型。分析了高拉速条件下结晶器冷却工艺对结晶器铜壁和冷却水温度分布的影响。结果表明:采用反向供水铜壁热面温度峰值比正向供水降低15 ℃,冷却水温度峰值降低14 ℃;提高冷却水速度可有效降低铜壁和冷却水温度;在保证冷却水不出现沸腾的条件下,增加供水压力对结晶器温度场变化没有影响;冷却水进水温度对铜壁整体和弯月面附近冷却水的温度影响较小。在结晶器下部低热流区,冷却水温度变化受进水温度的影响较为明显。冷却水道与铜壁热面间距对铜壁温度具有显著的影响,对于冷却水温度,冷却水道在距铜壁热面15 mm和25 mm处温度相差不大,距离热面为35 mm时冷却水温度明显降低。
  • 图  1  三维铜壁-铸坯模型

    Figure  1.  Three-dimensional copper wall-slab model

    图  2  三维铜壁-冷却水模型

    Figure  2.  Three-dimensional copper wall-cooling water model

    图  3  铜壁模拟温度和热电偶实测温度对比

    Figure  3.  Comparison of the simulated and measured temperature on copper wall

    图  4  供水方向对铜壁热面温度分布的影响

    Figure  4.  The influence of water supply direction on temperature distribution on hot surface of copper wall

    图  5  供水方向对靠近铜壁热面侧水道温度分布的影响

    Figure  5.  Influence of water supply direction on temperature distribution of water channel near hot surface of copper wall

    图  6  水速对铜壁热面温度分布的影响

    Figure  6.  The effect of water velocity on the temperaturedistribution on hot surface of copper wall

    图  7  水速对靠近铜壁热面侧冷却水温度分布的影响

    Figure  7.  The effect of water speed on the temperaturedistribution of cooling water near hot surface of copper wall

    图  8  供水压力对铜壁热面温度分布的影响

    Figure  8.  Effect of supply pressure on temperature distribution on hot surface of copper wall

    图  9  供水压力对靠近铜壁热面侧冷却水温度分布的影响

    Figure  9.  Effect of water supply pressure on temperature distribution of cooling water near hot surface of copper wall

    图  10  进水温度对铜壁热面温度分布的影响

    Figure  10.  Influence of inlet water temperature on temperature distribution on hot surface of copper wall

    图  11  进水温度对靠近铜壁热面侧冷却水温度分布的影响

    Figure  11.  Influence of inlet water temperature on temperature distribution of cooling water near the hot surface of copper wall

    图  12  水道位置对铜壁热面温度分布的影响

    Figure  12.  The influence of water channel position on temperature distribution on hot surface of copper wall

    图  13  水道位置对靠近铜壁热面侧冷却水温度分布的影响

    Figure  13.  The influence of water channel position on the temperature distribution of the cooling water near hot surface of copper wall

    表  1  结晶器的工艺参数

    Table  1.   Technical parameters of mold

    铜壁长度/mm冷却水道直径/mm冷却水速/(m·s−1)冷却水进水温度/℃供水压力/MPa拉坯速度/(m·min−1)浇注温度/℃
    1200148、10、12、1420、25、301.4、1.6 、1.861550
    下载: 导出CSV

    表  2  不同大气压下水的沸点

    Table  2.   The boiling point of water under different atmospheres pressure

    压力/MPa水的沸点/℃
    1.4194.1
    1.6200.4
    1.8206.1
    下载: 导出CSV

    表  3  铜的物性参数

    Table  3.   Physical parameters of copper

    密度/ (kg·m−3)热容/(J·kg−1·℃−1)热导率/(W·m−1·℃−1)
    8900390380
    下载: 导出CSV
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  • 收稿日期:  2021-08-12
  • 刊出日期:  2022-09-14

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