Convexity of a Set on the Plane in a Given Direction

A review of the existing methods for producing aluminum master alloys with silicon, zirconium, scandium and boron are given. Basic parameters, advantages and disadvantages of the existing methods are analyzed, indicating the need to develop new more energy-efficient technologies. The prospects of obtaining aluminum master alloys in the electrolysis of melts based on the KF-NaF-AlF 3 -Al 2 O 3 -MeO (MeO = SiO 2, ZrO 2 , Sc 2 O 3 , and B 2 O 3 ) system are considered. For this purpose, the results of physical and chemical measurements in these melts are presented, including data on the solubility of Al 2 O 3 , SiO 2, ZrO 2 , Sc 2 O 3 , and B 2 O 3 oxides in KF-NaF-AlF 3 melts, data on the effect of oxide additives on the liquidus temperature of studied melts, as well as data on the kinetics of electrowinning of aluminum and alloying element from KF-AlF 3 -Al 2 O 3 -MeO melts. Based on the measurements, the parameters were selected and electrolysis tests were carried out for obtaining aluminum master alloys with silicon, zirconium, scandium, and boron from its oxides. The composition and structure of the obtained master alloys were studied.

show abstract

“…Pressing of briquettes of Zr and Al (in the ratio 7:3) and dissolution in Al at 1300 °С. 1,36,37 + high concentration of Zr in Al (up to 70 wt%);…”

Section: Direct Mixingmentioning

confidence: 99%