Results showed that 3 kinds of polyacrylamide were all favourable to the sedimentation of red mud,but only cationic polyacrylamide could be used as filtration aid.

• 结果表明 :三种型式的聚丙烯酰胺均可作为赤泥的沉降助剂 ,但阴离子和非离子型不宜用作赤泥的过滤助剂 ,阳离子型则在赤泥的过滤过程中表现出了一定的助滤作用。