Method for recycling sewage in sodium fluosilicate production

The invention discloses a method for recycling sewage generated in sodium fluosilicate production. The sewage generated in the sodium fluosilicate production process can be effectively recycled. The method comprises the following steps: collecting fluosilicic acid in a phosphoric acid fluorine absorption system produced by wet-process phosphoric acid, or collecting silica gel-containing thick slurry in a fluosilicic acid settling tank and a fluosilicic acid settling tank; the method comprises the following steps: storing fluosilicic acid in a fluorine phosphate absorption system produced by wet-process phosphoric acid into a first storage tank; storing the silica gel-containing thick slurry in the fluosilicic acid settling tank and the fluosilicic acid settling tank into a second storage tank; filtering the fluosilicic acid in the first storage tank and the silica gel-containing thick slurry in the second storage tank by adopting filtering equipment; collecting the filtered filtrate, preparing the filtrate in