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The fluorine removal agent uses the strong polar electron cloud hybrid orbital of the effective component to achieve a strong bond with the fluorine element in the wastewater and fix it to achieve the effect of removing fluorine. It does not contain aluminum and iron, and does not affect the whiteness of evaporative crystalline salt. Suitable for high concentration brine (TDS content of 30000mg/L-80000mg/L can be used, the resulting suspended matter is easy to settle in high brine); The effluent fluoride was less than 10mg/L.