炉喉钢砖温度场的数值模拟研究

Numerical Simulation for Temperature Field of Throat Armor

炉喉钢砖是冶金工业中高炉反应器的重要部件,该产品的质量影响高炉冶炼过程能否长期稳定进行,对高炉冶炼十分重要。通过数值模拟和高炉实际生产研究相结合的方法,对炉喉钢砖的破坏机理进行了分析研究。结果表明,炉喉钢砖破坏的原因主要是高温侵蚀,在实际应用过程中,炉喉钢砖底部承受较大的热流,致使底部温度较高,温差较大,持续高温使炉喉钢砖上翘、变形、剥落。通过实际考察破损的炉喉钢砖,证实了数值模拟结果与实际情况吻合较好,证实这种被高炉冶炼所广泛采用的炉喉钢砖存在设计缺陷。因此,在炉喉钢砖的实际浇注过程中,应对其设计参数作进一步调整、优化,同时,也证实了带水冷的炉喉钢砖的合理性和必要性。

Throat armor is an important part for blast furnace in metallurgical industry, and its quality determines whether the pi＇ocedure of blast furnace smelting can be carried out steadily for a long time. In this paper, the method of mathematical simulation was adopted, combined with the actual production of blast furnace, to analyze and study the damage mechanism of throat armor. The results show that the high temperature erosion is the main reason for throat armor damage, the bottom of throat armor endures a heavy heat flux, and the persistent high temperature cause throat armor upwarping, deforming and peeling. The practical usage of throat armor proves that the result of mathematical simulation is reasonable, and there is shortcoming in design for this kind of throat armor, which is widely used in blast furnace smelting. So the designing parameter should be adjusted and optimized in process of throat armor casting, and it is also reasonable and necessary to use the water-cooling throat armor.