Method for adding carbonate into lead electrolyte to treat hydrofluoric acid

The invention relates to a method for adding carbonate into lead electrolyte to treat hydrofluoric acid. The lead electrolyte is lead silicofluoride obtained through reaction between industrial silicofluoric acid and lead oxide. The method comprises the following steps of (1) adding silica powder into the industrial silicofluoric acid, wherein the silica powder reacts with hydrofluoric acid to generate silicofluoride, so as to remove a part of the hydrofluoric acid; (2) adding a certain amount of carbonate, and adding the lead oxide after the hydrofluoric acid is removed. The method has the beneficial effects that the using amount of the lead oxide is reduced; the added carbonate is low in cost, so that the cost can be effectively lowered.