混凝法预处理冷轧钢废乳化液的研究

Study on Pretreatment of Waste Emulsion from Cold Rolling by Coagulation

摘要:  本实验采用混凝法对某钢厂冷轧钢废乳化液进行预处理，该废乳化液的浊度为3900NTU，COD为16,400mg/L。实验结果表明，聚合氯化铝铁具有一般铝盐和铁盐破乳剂的双重优点，将它与非离子型聚丙烯酰胺联合使用对冷轧钢废乳化液进行预处理时取得了良好的效果。在pH值为7.3，聚合氯化铝铁用量为1600mg/L，非离子型聚丙烯酰胺用量为1.5 mg/L的情况下处理废乳化液，出水剩余浊度为75 NTU，COD去除率可达97.2%。

Abstract:   In this study, the process of coagulation is adopted to pretreat the waste emulsion from cold rolling. The turbidity of waste emulsion is 3900 mg/L. The COD (Chemical Oxygen Demand) is 16,400 mg/L. The results show that PAFC has the dual advantages of general aluminum and iron salts. It is one of the most suitable demulsifiers. It has achieved such a good result when making the PAFC and the non-ionic PAC used in combination to pretreat the waste emulsion from cold rolling. To treat the waste emulsion from cold rolling, the optimum conditions are pH 7.3, 1600 mg/LPAFC and 1.5 mg/L non-ionic PAC.