矿热炉炉衬结构的温度场分析

Analysis of temperature field of lining structure in submerged arc furnace

为进一步研究矿热炉炉衬中温度场的分布情况,采用ANSYS仿真软件对真实简化的炉衬模型进行仿真分析。通过改变炉内温度和对流换热系数的数值,得到炉壁处的温度数据,与实测数据进行对比,验证模拟数据的合理性。结果表明,炉衬中不同耐火材料的温度分布存在差异;炉壁温度会随着炉内温度的增大而逐渐升高,随着对流换热系数的增大而降低;炉壁温度随对流换热系数的变化曲线斜率从0.13降到0.06,当曲线斜率逼近于0时,对流换热系数不再影响炉壁温度的变化,得到最优化的对流换热系数;模拟数据占实测数据的百分比在3%~8%范围内时,模拟数据能合理反映炉壁温度值。这为炉体保温结构设计和耐火材料的选用提供依据。

In order to further study the temperature field distribution of the submerged arc furnace lining, ANSYS analytical software was used to simulate the simplified model of the real furnace lining. By changing the furnace tem- perature and convection heat transfer coefficient, the temperature of furnace wall was obtained, which was compared with the actual measurement data to verify the reasonableness of the simulation data. The result showed that the temperature distributions of different refractory materials in furnace lining were different. The temperature of fur nace wall increased with the increase of temperature in the furnace, while decreased with the increase of convection heat transfer coefficient. And the slope of the curve about the variation of the furnace wall temperature with the con- vective heat transfer coefficient was decreased from 0.13 to 0.06. When the curve slope was approximate to zero, the convective heat transfer coefficient no longer had any effect on the change of the furnace wall temperature, then the optimized convective heat transfer coefficient was obtained. The percentage of the simulated data in the measured data was in the range of 3 %-8%, the temperature of the furnace wall was reasonably reflected by the simulation da- ta, which could provide the basis for the design of the insulation construction and the selection of refractory materials.