The invention belongs to the technical field of overhaul
slag treatment, and discloses a method for efficiently removing cyanofluoride from electrolytic aluminum overhaul
slag, which comprises the following steps of: S1, crushing the electrolytic aluminum overhaul
slag by using a
crusher until the particle size is less than 60mm; S2, adding a
fluorine fixing agent, the overhaul slag and clear water into the
ball mill according to the mixing
mass ratio of (1-5): 30: 18, carrying out mixing and ore
grinding, and meanwhile carrying out
fluorine fixing; S3, diluting the ore pulp in the step S2 with clear water until the concentration is 15%-40%, pouring the diluted ore pulp into an advanced oxidation reaction container of an
ozone micro-nano generator, starting the
ozone generator, introducing
ozone into the leached
slurry, and continuing to stir for reaction; and S4, carrying out
solid-liquid separation on the ore pulp reacted in the step S3, and adding a separated
liquid phase and a part of
solid phase into the ore pulp obtained by ore
grinding in the step S2. Compared with the prior art, the method provided by the invention comprises the four steps of crushing, ore
grinding and
fluorine fixing, micro-nano ozone
cyanogen removal and
solid-liquid separation, and has the advantages of simple process, short flow, high efficiency, low cost and the like.