Deep defluorination treatment method for lead-zinc smelting high-salinity wastewater

The invention relates to a deep defluorination treatment method for lead-zinc smelting high-salinity wastewater, and belongs to the field of deep defluorination of high-salinity wastewater, the method comprises the following steps: firstly adjusting the pH value of the high-salinity wastewater, then adding polyaluminum chloride (PAC), and finally adding nonionic polyacrylamide (PAM), and the fluorine content of the low-fluorine high-salinity wastewater can be reduced to 2.95 mg/L. The low-fluorine high-salt wastewater treated by the method completely reaches the national discharge index of water pollution fluoride of lead and zinc smelting enterprises, namely the fluorine content is lower than 8mg/L. The method not only is environment-friendly and low in cost, but also has a good fluorine removal effect, and meets the current national green development requirement. 本发明涉及一种铅锌冶炼高盐废水深度除氟处理方法，属于高盐废水深度除氟领域，本发明首先调节高盐废水的pH，然后加入聚合氯化铝PAC，最后加入非离子型聚丙烯酰胺PAM，本发明可将该低氟高盐废水含氟量最低可降至2.95mg/L。经过本发明处理后的低氟高盐废水已完全达到国家对铅锌冶炼企业水污染氟化物