摘要
研究了用ＮａＣｌ处理钙镁磷肥厂含氟废水并以Ｎａ２ＳｉＦ６固相形式回收其中氟的工艺条件和可行性。实验证明，在室温、ＰＨ值为１０～１２时，在废水中加入浓度为１０％左右的ＮａＣｌ，是Ｎａ２ＳｉＦ６生成和以固相形式存在的较好条件。
We have discussed the feasibility and technology requirement of retrieving fluorine in waste water from the factory producing calaium magesium phosphate, that is to use NaCl to turn fluorine into Na2SiF6 in solid state. Experiments have said that on the conditions of pH 10 - 12 and room temperature, adding NaCl which concentration is some ten percents into waste water is fitter for producing Na2SiF6 in sotid state.
