This invention discloses a method for preparing
rare earth metals by electrolytic oxides using a
fluoride system, belonging to the field of
rare earth metal preparation technology. This invention modifies
graphite anodes used in
rare earth molten salt electrolysis. It improves oxidation and
corrosion resistance, reduces
anode wear, lowers replacement frequency, and increases production efficiency, yielding high-purity, low-carbon rare earth
metal lanthanum. A three-dimensional network framework material is constructed using
Prussian blue self-
assembly and SiC is deposited to obtain a composite framework material. During pre-
calcination with
graphite and other materials, the derivatives optimize the
crystal structure and
interfacial bonding, enhancing the strength of the pre-shaped
anode material and ensuring the integrity and performance stability of the
electrode structure. Thirdly, the pre-shaped
anode material is impregnated with a specific impregnation solution, altering the gas
diffusion path and resistance, inhibiting oxidation reactions, and high-temperature
sintering generates substances that fill the pores, forming a dense
microstructure. Simultaneously, the compounds formed by
phosphoric acid enhance cohesion and adhesion, improving oxidation and
molten salt corrosion resistance, and extending the service life of the
graphite anode.