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为测定消失模工艺生产的球墨铸铁冷却壁的实际冷却性能,进行1∶1热态实验。同时建立铸铁冷却壁三维稳态传热模型,模拟铸铁冷却壁的温度场分布。热态实验结果表明:该球墨铸铁冷却壁壁体与冷却水之间的综合换热系数为228 W/(m2·℃),与日本新日铁第四代冷却壁相近。炉温变化对冷却壁热面温度的影响大于其对冷却壁冷面温度的影响。提高冷却水速可以降低冷却壁壁体温度,但效果不明显。模型计算结果与热态实验的比较,验证了计算模型的有效性。
In order to determine the actual cooling performance of the ductile iron stave produced by EPC process, a 1: 1 thermal experiment was carried out. At the same time, a three-dimensional steady-state heat transfer model of the cast iron stave was established to simulate the temperature distribution in the cast iron stave. The experimental results show that the comprehensive heat transfer coefficient between the cooling wall and the cooling water of the ductile iron is 228 W / (m2 · ℃), which is close to the fourth generation of Nippon Steel cooling wall in Japan. The effect of furnace temperature on the hot surface temperature of the cooling wall is greater than the impact on the cold surface temperature of the cooling wall. Increasing the cooling water velocity can reduce the temperature of the cooling wall, but the effect is not obvious. The comparison between the model calculation and the thermal experiment verifies the validity of the calculation model.