Method for preparing an electrolyte and an electrolyte replenishment system during aluminum electrolysis process

A method for preparing an electrolyte during an electrolytic process, including the steps of:

• Step A:
• placing aluminum in a first reactor, vacuumizing the first reactor and feeding inert gas, heating the first reactor to 700-850 degrees centigrade, adding only a first reactant of potassium fluozirconate, stirring 4-6 hours and extracting a first upper molten liquid to obtain only zirconium sponge and a potassium AlF3 cryolite;
• and placing aluminum in a second reactor, vacuumizing the second reactor and feeding inert gas, heating the second reactor to 700-850 degrees centigrade, adding only a second reactant of sodium hexafluorozirconate, stirring for 4-6 hours and extracting a second upper molten liquid to obtain only zirconium sponge and a sodium AlF3 cryolite;
• and
• Step B:
• mixing the obtained potassium cryolite with the obtained sodium cryolite in a molar ratio of 1:1 to 1:3.

A method for preparing an electrolyte comprising the steps of:

• Step A:
• placing aluminum in a reactor, vacuumizing the reactor and feeding an inert gas, heating the reactor to 700-850 degrees centigrade, and adding only sodium hexafluorozirconate;
• and
• Step B:
• stirring for 4-6 hours and extracting an upper molten liquid to obtain only zirconium sponge and an
• 3
• 2
• ⁢
• NaF
• ·
• AlF
• 3
• electrolyte during an aluminum electrolysis process according to a reaction formula of
• Al
• +
• 3
• 4
• ⁢
• Na
• 2
• ⁢
• ZrF
• 6
• =
• 3
• 4
• ⁢
• Zr
• +
• 3
• 2
• ⁢
• Na
• ⁢
• F
• ·
• AlF
• 3
• .