冷却工艺对高速连铸结晶器传热的影响

 为了分析冷却水的供水工艺对结晶器铜壁和冷却水温度场的影响,基于结晶器铜壁热电偶实测温度,构建铸坯/铜壁传热反问题和铜壁/冷却水正问题数学模型,采用ANSYS建立铸坯/铜壁/冷却水数值分析模型,对薄板坯结晶器温度场进行耦合传热分析,解析不同冷却工艺对高速薄板坯连铸结晶器内传热行为的影响。结果表明,水缝内冷却水流动方向对铜壁温度场具有显著影响,采用自上而下“反向供水”,比常规冷却工艺时铜壁热面温度峰值降低117 ℃,铜壁侧冷却水最高温度降低24 ℃,有效改善铜板工作状态,抑制冷却水局部沸腾趋势。提高冷却水速度可以进一步降低铜壁和冷却水温度,冷却水温度对铜壁温度场影响较小。

Influence of cooling process on heat transfer of high-speed continuous casting mold

In order to analyse the influence of the cooling water supply process on the temperature field of mold copper wall and cooling water gap,based on the mold temperature data measured by thermocouples in the copper wall,a mathematical model for the inverse heat transfer question of the slab/copper wall and the forward question of the copper wall/cooling water were constructed. The numerical analysis model of the slab/copper wall/cooling water of thin slab casting mold was established by ANSYS. Coupled heat transfer analysis of the temperature field of the reactor is carried out to analyze the influence of different cooling processes on the heat transfer behavior in the high-speed thin slab continuous casting mold. The result shows that the direction of water flow in the water gap has a significant impact on the temperature field of the copper wall. The top-down "reverse water supply" is adopted,which reduces the peak temperature of the hot surface of the copper wall by 117 ℃ compared with the conventional cooling process,and the maximum temperature of the cooling water on the copper wall side Lowering 24 ℃ can effectively improve the working condition of the copper plate and suppress the local boiling tendency of cooling water. Increasing the cooling water speed can further reduce the temperature of the copper wall and the cooling water,and the cooling water temperature has less influence on the temperature field of the copper wall.