ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Control Mechanism for Alumina Dissolution in Cryolite Melts

Ž. Lubyová and V. Daněk

Institute of Inorganic Chemistry, Slovak Academy of Sciences, SK-842 36 Bratislava

Abstract: The process determining the alumina dissolution rate in cryolite-based melts containing increased amount of AlF₃ and CaF₂, KF and LiF as additives, was studied. The influence of KF on the equilibrium solubility of Al₂O₃ in these melts was investigated.It was found that the dissolution rate of alumina in the cryolite-based melts may be limited by diffusion or heat transfer. Which of these processes becomes the control one is determined by the specific surface and the starting mass of Al₂O3, its solubility in the given melt, and the convection of electrolyte.

Full paper in Portable Document Format: 492a59.pdf

Chemical Papers 49 (2) 59–63 (1995)