本文研究了有无表面活性剂 (SDS、CTAB和TX10 0 )存在时 ,非离子型聚丙烯酰胺聚合物 (PAM N)对水悬浮液中高岭土的絮凝作用。从高岭土表面的电荷、表面活性剂和PAM N在高岭土表面上的吸附量和吸附结构、以及溶液性质讨论了高岭土悬浮液的絮凝和脱水性能。PAM N的絮凝作用使高岭土的沉降速度约增大 2 0倍。絮凝使滤饼单位阻力从 7 8·10 1 1 m/kg降至 1 1·10 1 1 m/kg。但是高分子聚合物将大量水俘获到絮团中 ,使滤饼水分提得很高。表面活性剂预处理降低了PAM N在高岭土上的吸附量 ,这是由于表面活性剂分子堵塞高岭土表面上的一些质点。假设在这些情况下聚合物具有不同的适于通过桥联作用发生絮凝和提高沉降速度的条件。虽然经表面活性剂预处理后高岭土的絮凝没有进一步降低SRF值 ,但滤饼水分大幅度降低。添加PAM N与表面活性剂的混合物使得PAM N在高岭土表面上的吸附量增大 ,但是 ,沉降速度和滤饼水分降低 ,而SRF值不变化 In this paper, the flocculation of nonionic polyacrylamide polymer (PAM N) to kaolin in aqueous suspension in presence of surfactant (SDS, CTAB and TX10 0) was investigated. The flocculation and dehydration properties of kaolin suspension were discussed from the charge on the surface of kaolin clay, the adsorption capacity and adsorption structure of surfactant and PAM N on kaolin surface, and the nature of the solution. The flocculation effect of PAM N increases the settling velocity of kaolin about 20 times. The flocculation reduced the cake unit resistance from 7 8 · 10 1 1 m / kg to 1 1 · 10 1 1 m / kg. However, the polymer will be a large number of water captured flocs, so that the filter cake made of water is very high. Surfactant pretreatment reduces the amount of PAM N adsorbed on the kaolin because the surfactant molecules block some of the mass on the surface of the kaolin. It is assumed in these cases that the polymer has different conditions suitable for flocculation and increasing settling velocity by bridging action. Although flocculation of kaolin after surfactant pretreatment did not further reduce the SRF, the water content of the filter cake decreased significantly. Addition of a mixture of PAM N and surfactant increased the adsorption of PAM N on the surface of kaolin, however, the settling velocity and the cake moisture decreased while the SRF value did not change