采用聚丙烯酰胺作絮凝剂可促进采矿、洗煤回收水中的固体物沉降，使水澄清，同时可回收有用的固体颗粒，并避免对环境造成污染。

Using polyacrylamide as flocculant can promote the solid content of settlement in mining, coal washing, make the water clear, recycle useful solid particles at the same time, also avoid damage to the environment .