FIELD: metallurgy.
SUBSTANCE: invention relates to electrolytic metallurgy. Method to clean flushing water of a catching bath from the compounds of lead, tin and boron fluoride anions with the help of two-chamber electrolytic cell involves removal of tin and lead compounds from catholyte - flushing water - by way of recovery on the cathode up to metal with its further return to the operating bath and removal of boron fluoride anions due to their migration through an anion-exchange membrane to the anolyte where fluoboric acid is accumulated and used again; chemically stable insoluble anode material based on titanium and lead dioxide with anodic current density equal to 1-20 A/dm2 is used as the anode.
EFFECT: significant (by many times) increase of the duration of continuous installation operation.
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