Abstract
The better understanding of anode bubble behavior during aluminum electrolysis can help not only improve the “noise control”, but also optimize the operational conditions and parameters. The effects of current density, electrolysis temperature and alumina content on bubble behavior were investigated in this study. The voltage signals were analyzed using Fast Fourier transform to study variations in the frequency responses. This study demonstrates that the size of bubbles become smaller with the increase of current density, electrolysis temperature and alumina content. Bubble release frequency increases with increase of current density, electrolysis temperature and alumina content. The amplitude of cell voltage fluctuations decrease from 80 mV to 15 mV as current density increases from 0.4 to 1.0 A/cm2. The domain frequency increases from 0.1 Hz to 0.2 Hz as temperature increases from 950 °C to 970 °C.
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