湿法磷酸工艺副产物氟硅酸中含有氯等多种杂质，这些杂质的存在不仅影响氟硅酸的纯度和后续产品的质量，还会造成生产设备腐蚀和环境污染。用单因素法对臭氧氧化法去除氟硅酸溶液中的氯进行实验研究，分析臭氧流量、氟硅酸含量、反应时间、反应温度对臭氧氧化去除氟硅酸溶液氯离子的影响，为了更加准确地确定臭氧除氯的参数，选取反应时间、反应温度、氟硅酸含量为影响因素，以氯去除率和氟损失率为响应值，采用单因素实验法运用Design-Expert13中的Box-Behnken（BBD）方法设计3因素3水平实验方案来进行响应面实验，结果得出臭氧去除氟硅酸中氯的最佳条件为臭氧流量为48 g/h、反应温度为45 ℃、反应时间为4 h、氟硅酸质量分数为36.00%。在最佳实验条件下，氯的去除率为96.85%，氟的损失率为3.29%，研究结果为脱除氟硅酸中氯提供新思路。

The by-product fluosilicic acid produced by the wet-process phosphoric acid production contains various impurities such as chlorine.The presence of these impurities not only affects the purity of fluosilicic acid and the quality of subsequent products，but also causes corrosion to the production equipment and pollutes the environment.In this paper，the single-factor method was used to conduct an experimental study on the removal of chlorine from fluosilicic acid solution by ozone oxidation.The effects of ozone flow rate，fluosilicic acid content，reaction time，and reaction temperature on the removal of chloride ions from fluosilicic acid solution by ozone oxidation were analyzed.In order to more accurately determine the parameters for ozone chloride removal，based on the results of the single-factor experiments，three factors that had a significant impact on the chloride removal rate were selected，including reaction time，reaction temperature，and fluosilicic acid content.The Box-Behnken（BBD） method in Design-Expert 13 was used to design a 3-factor 3-level experimental scheme for response surface experiments.The results showed that the optimal conditions for ozone to remove chlorine from fluosilicic acid were：ozone flow rate of 48 g/h，reaction temperature of 45 ℃，reaction time of 4 h，and fluosilicic acid content of 36.00%.Under the best experimental conditions，the chlorine removal rate was 96.85%，and the fluoride loss rate was 3.29%.This study could provide new ideas for removing chlorine from fluosilicic acid.