永久层浇注料种类对钢包保温性能的影响

Effect of Permanent Layer Castable on Heat-insulating Properties of Ladle

以某钢厂90 t整体浇注钢包为研究对象,利用ANSYS软件建立三维有限元模型,采用数值模拟方法对钢包盛钢过程的温度分布规律进行研究,比较钢包内衬永久层采用铝镁浇注料和轻质浇注料两种材料时对钢包保温性能的影响。研究结果表明:永久层采用轻质浇注料替代铝镁浇注料后,钢水平均温度提高7 K,钢水温降速率降低0.35 K/min,永久层温度梯度增加17.5 K/mm,由于钢包外壳散热的减少每小时可以节能993.6 MJ,折合标煤为33.9 kg。数值模拟结果与测量数据基本吻合,其相对误差小于10%。

Based on ANSYS software, three dimensional finite element model for a 90 t overall ladle furnace was built. The study on temperature distribution of ladle in molten steel holding process was conducted with numerical method. Comparison between the effect of using alumina-magnesia castable and lightweight castable as permanent layer material to the ladle heat-insulating property was highlighted. The results show that when using lightweight castable in place of alumina-magnesia castable as permanent layer material, the average temperature of molten steel is increased by 7 K, and the temperature drop rate is reduced by 0.35 K/min, and the temperature gradient of permanent layer is increased by 17.5 K/mm. Due to the reduction of the ladle shell heat loss, the energy of 993.6 MJ could be saved per hour, which is equivalent to 33.9 kg standard coal. The relative error of the simulation results to experimental results is less than 10%.