高炉铜冷却壁热态实验及温度场数值模拟

Thermal test and numerical simulation of the temperature field of a blast furnace copper stave

根据铜冷却壁传热过程分析,得到铜冷却壁热面复合传热系数的计算公式,并在1:1的热态实验炉上进行了热态实验,得到不同炉气温度下相应的热面复合传热系数值.建立了铜冷却壁三维数学模型,模拟铜冷却壁在几种不同的热面边界条件下的温度场分布.通过与热态实验结果对比分析可知,热面复合传热系数不能取恒定值,需要考虑炉气温度变化的影响.通过模拟结果,计算壁体热流密度的分布,还可得到热面渣皮的厚度的变化范围.

An expression of combined heat transfer coefficient was obtained based on the heat transfer analysis of a blast furnace copper stave, and the combined heat transfer coefficients at different gas temperatures were obtained through the thermal test in an experimental furnace. A three-dimensional mathematical model was established for the copper stave, and the distribution of temperature field was simulated under different boundary conditions. Comparing the result of simulation with that of the thermal test, the combined heat transfer coefficient should not be a constant but a variable dependant on gas temperature. The distribution of heat flux density in the copper stave and the change range of slag thickness on hot-face were derived from the result of simulation.