采用氯化钙化学沉淀,聚合氯化铝混凝,聚丙烯酰胺助凝,净化石英提纯工业废水中的氟离子.试验结果表明:pH值、药剂用量、添加顺序、反应时间等条件对净化效果有明显影响.在模拟选矿废水条件下可将氟离子质量浓度从100 mg/L降至8 mg/L,用优化后的反应条件净化石英提纯工业含氟废水,净化排水中氟离子质量浓度符合国家工业废水氟化物一级排放标准,为石英提纯工业含氟废水的净化提供技术支持.%The fluoride ions of quartz industrial wastewater were purified by chemical precipitation, coagulation and auxiliary coagulation using calcium chloride, polymeric aluminum chloride and polyacrylamide respectively. The results showed that the effects had been obviously affected by pH, dosage of reagent, adding order and reaction time. The fluoride ion concentration of wastewater were degraded from 100 mg/L to 8 mg/L under the condition of simulating mineral processing wastewater. Optimized conditions were used to deal with the fluoride ions of quartz industrial wastewater, and it meet the criteria of the nation first grade standard. It will provide a technical support for purification of industrial wastewater containing fluoride.
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