Liquidus temperatures for primary crystallization of cryolite in molten salt systems of interest for aluminum electrolysis

Liquidus Temperatures of Cryolite Melts With Low Cryolite Ratio

“…The melting points of the electrolytes NaF-AlF 3 are as follows: 1000 K (727°C) (CR = 1.3), 1005 K (732°C) (CR = 1.5), and 1133 K (860°C) (CR = 1.7), which are close (within 10 degrees) to literature data, [18] but some differences were noted with data obtained by authors [23] for the Na 3 AlF 6 -AlF 3 system up to 30 wt pct AlF 3 .…”

Solutions of iron oxides in molten cryolite

“…[1] In view of the uncertainties in the auxiliary of the NaF-AlF 3 -Al 2 O 3 -FeF 2 quaternary. Since solid cryodata, the agreement is close enough to lend strong support lite is itself nonstoichiometric [16,17] and the solid solubility to the hypothesis. What has been demonstrated, in effect, is must interact with that intrinsic disorder, the system is that Fe(II) derived by solution from FeO has the same activmuch too complex to analyze further with the very limited ity coefficient as FeF 2 in solution in an oxide-free melt.…”

Anodic Dissolution of Metals in Oxide-Free Cryolite Melts

“…was measured in the raw powders by LECO analysis: initial alumina content in the melt was under 0.21%wt. The melting point was calculated to be 975°C [12].…”