Method for removing heavy substances from industrial wastewater in production of aluminum-doped cobalt carbonate

The invention belongs to the technical field of heavy metal removal of industrial wastewater, and discloses a heavy metal removal method of industrial wastewater in aluminum-doped cobalt carbonate production, which comprises the following steps of: collecting supernatant with higher cobalt content generated by slurry concentration in the process of synthesizing aluminum-doped cobalt carbonate, adding a stirrer and an internal circulation device in a supernatant storage tank, and after the supernatant flows into the storage tank, removing heavy metal in the aluminum-doped cobalt carbonate. Slaked lime is added for heavy removal, the slaked lime and ion-state cobalt in the supernate react to generate cobalt hydroxide and calcium carbonate, meanwhile, cobalt carbonate and an ammonia nitrogen complex in the supernate are decomplexed through the slaked lime, the decomplexed cobalt carbonate is precipitated, and the cobalt carbonate is separated out; the slaked lime is pumped into a settling pond for settling, flow