Determining the Optimal Anode Baking Level Amidst Coke Quality Variation and Productivity Constraints
摘要
Anode baking levelAnode baking level, measured through crystallite size (Lc) or real density (RD) of baked anodesAnode, is a crucial indicator of the performance of prebaked anodesAnode used in modern aluminiumAluminium electrolysis cells. It significantly affects electrical and mechanical propertiesMechanical properties and serves as a predictor of the dustingDusting propensity or “wasteful” consumption of carbon anodesCarbon anode. Historically, a Lc value of 29 Å was sufficient. However, due to increased variationVariations in raw materials, more stringent electrolysis cell operating conditions, and tighter environmental regulations, it is necessary to strike a balance between the optimal baking level, the lowest practicable carbon consumptionCarbon consumption, and optimal furnaceFurnace productivityProductivity. This article outlines the approach taken by Emirates Global AluminiumAluminium (EGA) to determine the target baking level to minimize carbon consumptionCarbon consumption; and the strategy employed to sustain a consistent level of anodeAnode baking during the natural age-related deterioration of the bake furnaceFurnace.