Abstract
The quality of carbon anode used in aluminum industry depends strongly on the baking process. Impact of operational parameters and geometry on the performance of baking furnace by using plant tests are generally expensive and may disrupt the baking process. Numerical modelling is an imperative tool to study the effect of different operational parameters on the baked anode quality, and furnace performance. In the present work, a two-dimensional (2-D) computational fluid dynamics (CFD) model is developed that simulates heat transfer and flow characteristics of gas in the baking furnace flue-wall. Effect of several operational parameters on gas temperature distribution is investigated. During anode baking process, the main challenge is to obtain a uniform flow field and consequently a homogenous anode temperature distribution. In the present study, flow and temperature uniformity indices based on mass and area weighted averages are introduced as a quantitative indication of the flow and temperature homogeneity. Effect of variation in flue-wall design for two different geometries on flow field are studied and it is observed that closing the top side of the first baffle results in more uniform flow distribution and less energy consumption.
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