(1. 重慶大學(xué) 材料科學(xué)與工程學(xué)院， 重慶 400044;
2. 重慶大學(xué) 動力學(xué)院， 重慶 400044;
3. 中國鋁業(yè)公司廣西分公司， 平果 531400)
摘 要: 針對大型預(yù)焙鋁電解槽槽底形狀復(fù)雜同時存在多塊陽極的計(jì)算對象， 應(yīng)用整體建模及耦合求解方法， 對煙氣加熱啟動的溫度場進(jìn)行了數(shù)值計(jì)算。計(jì)算模型中紊流模型采用RNGκ-ε模型， 用離散傳播法計(jì)算輻射傳熱時可避免了復(fù)雜的空間積分運(yùn)算，使溫度場的求解簡單方便， 較好解決了電解槽煙氣加熱啟動的溫度場計(jì)算。 結(jié)果表明： 煙氣加熱啟動具有升溫速度易控制、 陰極表面最大溫差被控制在100℃左右， 對扎縫和邊部扎固糊的加熱充分， 能較好地滿足大型鋁電解槽加熱啟動工藝要求。
關(guān)鍵字: 鋁電解槽; 溫度場; 數(shù)值模擬; 焙燒
gas start-up method for aluminum electrolysis cell
ZHANG Bing-huai1， TANG Qian3
（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
