Anionic polyacrylamide (APAM) series products are water soluble linear polymers synthesized under high degree polymerization, easily soluble in water , mainly used in water clarification and purification treatment. Due to its molecular chain contains a certain amount of negative gene, it can through the adsorption of solid particles suspended in water, make the bridge between particles or by charge neutralization particles condensed to form large flocculate, so it can accelerate particle in the slurry settlement also , there is a very significant  effect to speed up the solution to clarify, promote the filter and so on.