Sustainable Mining and Metallurgy

In this paper, the new alumina extracted from fly ash was used as the electrolytic raw material. According to the performance characteristics of the new alumina, the simulation calculation was carried out based on the 200kA aluminum electrolytic cell. The electrolyte flow field and the distribution of the new alumina concentration in the electrolytic cell were studied. The mass transfer factors affecting the dissolution, diffusion and convection of the new alumina were analyzed, and the dissolution transport performance in the new alumina electrolysis process was mastered. The results show that the new alumina dissolves quickly and uniformly in the electrolyte, the electrolyte flow field is stable, and the alumina at the aluminum end and the corner of the flue end dissolves fastest. In actual production, by reasonably configuring the feeder and the feeding point to control the dispersion and transport of alumina concentration, the uniform distribution of alumina concentration and the stability of electrolyte flow field can be maintained, which is beneficial to reduce the anode effect and improve the current efficiency.