Smelting method:
    

     Rare earth smelting method has two kinds, namely wet metallurgy and pyr

ometallurgy.

 

Specification:

 

 One is the lack of sulfide and sulfate (only extremely individual), it shows that the rare

 

earth elements have a close oxygen sex.

 

   The second is rare earth silicate mainly is the island, no lamellar, frame shape and chain structure.

 

   The third is part of the rare earth mineral (especially complex oxide and silicate) present amorphous state.

 

   The fourth is rare earth mineral distribution, in the magmatic rock and pegmatite in silicate and oxide is given priority to, in the hydrothermal deposit and weathering crust deposit in fluorine carbonate, phosphate is given priority to.