Method for deeply removing fluorine from fluorine-containing wastewater in lithium battery resource recycling process

The invention discloses a method for deeply removing fluorine from fluorine-containing wastewater in a lithium battery resource recycling process, which adopts a technological process of one-stage two-stage neutralization flocculation sedimentation and two-stage one-stage coagulation deep fluorine removal, and adopts a neutralization reaction tank, a flocculation tank, a mixed sedimentation tank and the like. The fluorine-containing wastewater in the lithium battery resource recycling process is subjected to one-stage first-stage and one-stage second-stage fluorine removal, the fluorine ion concentration in the wastewater subjected to fluorine removal is smaller than 100 mg/L, after supernate obtained after one-stage fluorine removal overflows to an intermediate water tank to adjust the pH value, two-stage first-stage coagulation deep fluorine removal is carried out, and qualified supernate is discharged after sedimentation. According to the method, deep fluorine removal of the fluorine-containing wastewater