Therefore, comparable settling tests were made on the settling agents such as PAM, lime, PFS, alum, and PAC. It was found that a combination of PFS and lime could achieve good settling effect of tailings. 为此,通过沉降试验对PAM、石灰、聚合硫酸铁(PFS)、明矾、聚合氯化铝(PAC)等沉降剂进行了比较,发现PFS与石灰组合可获得较好的尾矿沉降效果。