Performance Analysis of a Horizontal Anode Baking Furnace for Aluminum Production
Anode baking is a critical step in production good quality of carbon anodes which are needed for aluminum production. The operational and geometrical parameters have significant influence on the anode baking furnace performance and the resulting carbon anode quality. Numerical modelling is an imperative tool to investigate the effect of different parameters on the anode baking process. In the present study, a numerical model is developed which simulates heat transfer and flow distributions of the entire anode baking process. This numerical model is employed to study the effects of various factors on anode temperature distribution. The impact of degraded refractory-wall thermal conductivity on baking process is also investigated and it is observed that the material properties degradation for the aged furnace should be addressed accordingly. During the preheating and firing sections. the temperature drops drastically from fluegas to the center of the anode through the width of the pit which indicates a huge loss of energy. For the entire baking process, the result shows that the temperature non-uniformity presents mostly in the refractory wall and packing coke regions, and anode experiences a homogenous temperature distribution.