Molten salt composition for smelting magnesium using solid oxide membrane (som) process

Abstract

Provided is a molten salt composition for smelting magnesium using a solid oxide membrane (SOM) process. The low-temperature molten salt composition can be applied to a SOM process and contains, by wt %, 42% to 47% of MgF 2 , 42% to 47% of CaF 2 , 6% to 16% of one or more of LiF and NaF, and a remainder of inevitable impurities.

1 . A low-temperature molten salt composition applicable to a solid oxide membrane (SOM) process, comprising, by weight%: 42% to 47% of MgF 2 , 42% to 47% of CaF 2 , 6% to 16% of one or more of LiF and NaF, and a remainder of inevitable impurities. 
     
     
         2 . The low-temperature molten salt composition of  claim 1 , wherein the composition has a MgF 2 —CaF 2 (=1:1)-MF(M═Li, Na)-base composition. 
     
     
         3 . The low-temperature molten salt composition of  claim 1 , wherein solubility of magnesium oxide (MgO) in the composition is 1.5 wt % or higher at 950° C. 
     
     
         4 . The low-temperature molten salt composition of  claim 1 , wherein a melting point of the low-temperature molten salt is 950° C. or below, and a partial pressure of LiF or NaF is less than 2.0×10 −3  atm.