为探索某选矿厂铁尾矿回收利用的新途径，对铁尾矿酸浸液制备聚氯化铁的试验过程进行了研究，并将自制的聚氯化铁应用到高岭土悬浊液的混凝试验中测试产品的絮凝性能。结果表明：聚合的适宜条件为温度为40 ℃、pH为1.0、聚合时间为3 h，在该条件下合成的聚氯化铁盐基度为20.91%，符合相关标准，影响聚合过程因素的主次顺序依次为聚合温度、pH、聚合时间；混凝的适宜条件为聚氯化铁投加量为250 mg/L、pH为7.0、搅拌时间为3 min、温度为20 ℃、混凝时间为60 min，在该条件下浊度去除率为95.54%，产品除浊效果良好。

In order to explore a new approach to the recovery and utilization of iron tailings from an iron ore dressing plant，the experimental process of preparing polymeric iron chloride from the acid leaching solution of the iron tailings was studied，and the self-made polymeric ferric chloride was applied to the coagulation test of kaolin suspension to test the flocculation performance of the product.The experimental results showed that the suitable conditions for polymerization were temperature 40 ℃，pH of 1.0，and polymerization time 3 h.Under these conditions，the alkalinity of synthesized polymerized ferric chloride was 20.91%，which met relevant standards，and the primary and secondary ranking of factors affecting the polymerization process were polymerization temperature，pH and polymerization time.The suitable conditions for coagulation were the dosage of polymeric ferric chloride of 250 mg/L，pH of 7.0，stirring time of 3 min，temperature of 20 ℃ and coagulation time of 60 min.Under these conditions，the turbidity removal rate was 95.54%，and the product had a good turbidity removal effect.