Preparation Method for Functional Material for Extracting Lithium from Aluminum Salt

A preparation method for a functional material for extracting lithium from an aluminum salt, characterized by comprising the following steps:

• step 1, preparation of an aluminum salt functional material precursor slurry:
• mixing polyaluminum, a lithium source and water in proportion, adding an additive, performing ultrasonic stirring to obtain a mixed salt solution, adding an alkali liquor or a basic salt solution into the mixed salt solution at a certain flow rate, adjusting the pH value, and then performing constant-temperature stirring reaction to obtain a lithium-intercalated aluminum salt functional precursor slurry;
• and
• step 2, preparation of aluminum salt functional material powder:
• A) preparation of gel:
• The lithium-intercalated aluminum salt functional precursor slurry obtained in step 1 is subjected to solid-liquid separation, and the solid phase obtained is the aluminum salt functional material gel;
• B) scrubbing:
• scrubbing the aluminum salt functional material gel obtained in the step A) with deionized water, and then performing solid-liquid separation to obtain lithium-intercalated gel;
• C) drying and grinding:
• drying and grinding the lithium-intercalated gel obtained in the step B) to obtain a functional material for extracting lithium from an aluminum salt.