阳极焙烧温度场的数值模拟

以FLUENT 6.3为计算平台,建立了阳极焙烧温度场的计算模型,采用数值模拟的方法研究了不同焙烧曲线对阳极升温过程、终焙温度和内外温差的影响.结果表明:数值模拟结果与实测值极为接近,所建模型具有较高的可信度.在其它参数一定的条件下,随火焰周期的延长,阳极表面和中心的升温速率变小,终焙温度升高且出现的位置后移,阳极内外温差缩小,阳极内部温度均匀性得到改善；随火焰周期的变短,阳极在各焙烧阶段的平均升温速率增大,保温时间减少,操作参数的控制难度增大.

Numerical Simulation on Temperature Field of Carbon Anodes during Baking

The heat transfer mathematical modes for carbon anodes baking process were established to simulate the influence of baking curves on the process of raising temperature,finishing baking temperature and the difference in temperature between inside and outside of carbon anodes on FLUENT 6.3 software.The results show that the mathematical modes are reasonable because the simulated results of temperature raising rate is much close to the measured results in carbon anodes.The temperature raising curves of carbon anode-central gradually move to right,the finishing baking temperature gradually rise,and the difference in temperature between inside and outside of carbon anode decreases with the increase of fire cycle time when the other parameters are constant.The temperature raising rates rise in each baking phases increases,the soaking time decreases and the operating difficulties increases with the fire cycle time reducing.