混凝沉淀除氟在钢厂中的应用研究

Research on the Application of Coagulation Precipitation Fluoride Removal in Steel Mills

摘要: 氟化物对人类的生活及环境有着重大的影响，在钢厂等工业废水的除氟工艺中，混凝沉淀除氟工艺应用较为广泛。为研究混凝沉淀法除氟在钢厂中的应用，以神美高效除氟剂为试验药剂，以马鞍山某钢厂生产废水为处理对象进行实际应用研究试验。首先通过室内小试试验，筛选出除氟效果最优的神美除氟剂A。然后以小试试验结果为指导，在马鞍山某钢厂两套除氟系统中进行实际应用生产试验研究。结果表明，为满足出水指标要求(氟化物含量 ≤ 30 mg/L)，1#系统除氟剂投加量需控制在2500~2700 mg/L，2#系统除氟剂投加量需控制在8000~8500 mg/L；折合药剂投加比例为：(60~80 mg/L药剂)/(1 mg/L氟化物)。

Abstract: Fluoride has a significant impact on human life and environment. In the fluoride removal process of industrial wastewater such as steel mills, the coagulation and precipitation fluoride removal process is widely used. In order to study the application of coagulation precipitation fluoride removal in steel mills, Shenmei high-efficiency fluoride remover is taken as the test agent, and the production wastewater of a steel plant in Ma’anshan is taken as the treatment object for practical application research test. First through the indoor small test, the optimal fluoride removal effect of Shenmei fluoride removal agent A is selected. Then, with the small test results as the guidance, the practical application of production test research is conducted in two sets of fluorine removal systems in a steel plant in Ma’anshan. The results show that in order to meet the requirements of effluent index (fluoride content ≤ 30 mg/L), the amount of fluoride remover of 1# system should be controlled at 2500~2700 mg/L, and the amount of 2# system should be controlled at 8000~8500 mg/L; the dosage ratio is: (60~80 mg/L agent)/(1 mg/L fluoride).