The metallurgical industry sewage treatment generally adopts redox treatment. Sewage redox method: the toxic and harmful substances dissolved in the sewage are converted into non-toxic and harmless new substances through redox reaction. This kind of sewage treatment method is called Redox method of sewage. Due to the high temperature of metallurgical wastewater and the presence of many organic substances such as oil, ordinary flocculants are difficult to achieve the desired treatment effect. Polyacrylamide treats metallurgical wastewater with fast flocculation sedimentation, clear surface water, and good sludge dewatering.