Recycling process of waste liquid of electrode foil formation tank liquid

The invention discloses a process for recycling waste liquid of an electrode foil formation tank liquid, which comprises the following steps of: filtering the waste liquid to obtain filtrate and filter residues; adding ammonia water into the filtrate, stirring, and adjusting the pH value to 7-8; filtering the solution with the adjusted pH value to obtain an aluminum hydroxide solid and a filtrate without aluminum ions; performing first-stage membrane separation on the filtrate without aluminum ions to obtain first-stage separated concentrated liquor and ammonium chloride dilute liquor; adding pure water into the primary separation concentrated liquid for washing; the washed diluent is subjected to secondary separation, and secondary separation concentrated liquid and ammonium chloride dilute liquid are obtained; concentrating the ammonium chloride dilute liquid to obtain ammonium chloride concentrated liquid and pure water; carrying out cooling crystallization treatment on the ammonium chloride concentrated l