Abstract
Thermal balance of an aluminium reduction cell is indicated by a stable freeze profile with acceptable thickness. One of the main factors which contributes to a stable freeze profile, where the freeze is not extending beyond the anode shadow is the cell lining design. In this study, a 3D quarter cell thermo-electric model of an 86 kA cell was developed using ANSYS. The model was validated with the plant measurements and subsequently utilized to evaluate the influence of carbon seam on the freeze profile in the aluminium reduction cell. The simulations were conducted both at design amperage and at increased amperage. It was observed that the impact of the seam shape was significant on the freeze profile and seam shape modifications could be investigated for achieving a stable freeze profile and for amperage increase programs. A nearly vertical seam provided a stable freeze profile both at design and higher amperages compared to conventional bevel shaped seam.
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