Technology of Reducing Carbon Dust Amount in Aluminum Electrolysis Production with High Lithium Potassium Electrolyte System

This publication addresses a significant high carbon dust amountCarbon dust amount in aluminum electrolysisAluminum electrolysis with a high lithium potassium electrolyte. The wettabilityWettability of electricity on carbon materials and the influence of molecular ratiosMolecular ratio on carbon content in electrolyte melts were studied. Industrial tests were carried out, and the carbon dust amountsCarbon dust amount dropped significantly due to targeted measures. The results show that the wettabilityWettability of high lithium potassium electrolyte with carbon materials is better than that of pure electrolyte with low or no LiF and KF content. Generally, the carbon content and carbon dust in high lithium potassium electrolytes caused by domestic aluminaAlumina use are higher than those of pure electrolyte systems, but a reasonable range of molecular ratiosMolecular ratio could keep the carbon content below 0.2%. The key measures for reducing carbon dust in high lithium and high potassium systems follow the same rules for the wettabilityWettability of the electrolyte to the carbon materials.