Production of Al‐Sc Alloy by Electrolysis of Cryolite‐Scandium Oxide Melts

Production of Al-Sc Alloy by Electrolysis from Cryolite Melt Using Secondary Feedstock Material

“…Figure 3). A precipitation of the intermetallic phase occurred upon slow cooling of the electrolysis cell, but a uniform distribution of scandium in the aluminium metal is expected owing to the electromagnetic forces created during electrolysis, as reported previously [6]. The amount of Sc in the metal product was analysed by ICP-MS and increased with the current density, ranging from 1.87 wt% Sc at 0.79 A cm −2 to 2.6 wt% Sc at 0.93 A cm −2 .…”

“…Previous work has been published suggesting molten salt electrolysis as a suitable method in the manufacture of Al-Sc alloys from fluoride-or chloride-based molten salts [3][4][5][6], using reasonably priced Sc 2 O 3 as raw material.…”

Electrowinning of Aluminum and Scandium from KF-AlF3-Sc2O3 Melts for the Synthesis of Al-Sc Master Alloys

“…The production of the Al-Sc master alloys using rather cheap Sc 2 O 3 in the alumina reduction cells seems to be more profitable, because this way excludes such operations as cooling, transportation, and subsequent heating of the obtained pure aluminum as well as does not demand an additional reactor for the Al-Sc master alloys production. 7,8 This technology is characterized by high temperature (950-960°C), low degree of the scandium extraction, presence of the excess hazardous gaseous products, and low common energy-efficiency.…”

Electrode processes in the KF–AlF3–Al2O3 melt

“…Although, W forms an intermetallic compound Al4W with Al interaction on its surface, no significant effect on the kinetic parameters of the cathode process were observed [39,40]. In addition, W shows relatively good chemical resistance towards the liquid aluminium [41]. The electrolysis tests were conducted using aluminium bronze alloy in NaF-KF-AlF3 system with different proportions [42,43].…”