(1. 重庆大学 材料科学与工程学院， 重庆 400044;
2. 重庆大学 动力学院， 重庆 400044;
3. 中国铝业公司广西分公司， 平果 531400)
摘 要: 针对大型预焙铝电解槽槽底形状复杂同时存在多块阳极的计算对象， 应用整体建模及耦合求解方法， 对烟气加热启动的温度场进行了数值计算。计算模型中紊流模型采用RNGκ-ε模型， 用离散传播法计算辐射传热时可避免了复杂的空间积分运算，使温度场的求解简单方便， 较好解决了电解槽烟气加热启动的温度场计算。 结果表明： 烟气加热启动具有升温速度易控制、 阴极表面最大温差被控制在100℃左右， 对扎缝和边部扎固糊的加热充分， 能较好地满足大型铝电解槽加热启动工艺要求。
关键字: 铝电解槽; 温度场; 数值模拟; 焙烧
gas start-up method for aluminum electrolysis cell
（1. College of Materials Science and Engineering,
Chongqing University, Chongqing 400044, China;
2. College of Power Engineering, Chongqing University, Chongqing 400044， China;
3. Guangxi Branch, China Aluminum Ltd., Pingguo 531400， China）
Abstract:Considering the complicate shape and large number of anodes of prebaked cells bottom, the temperature field was numerically simulated by integral model and coupling method with RNGκ-ε turbulent model, and the radiation field was calculated by discrete transmission method, avoiding the difficulties to integral space. The results reveal that the gas baking start-up can easily control the temperature-up speed, and the maximum temperature difference of cathode surfaces is up to 100℃. With the start-up method, the joint and ramming paste of the edge can be fully baked, which meets the requirements of start-up process of aluminum electrolysis cell.
Key words: aluminum electrolysis cell; temperature field; numerical simulation； start-up method
