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The application of nonionic polyacrylamide in building materials has been widely promoted owing to its role of flocculation, water holding, thickening, adhesion and lubrication. In addition, non-ionic polyacrylamide in other building materials, because of its ultra-high viscosity and its special molecular structure, has good water retention effect.
Flocculation studies on iron-ore fines (size < 10 μm) were conducted using three anionic polyacrylamide polymers over the pH range 4.0–10.0 and flocculant dosages up to 0.20 kg/ton.The flocculation was favourable under acidic conditions and was helped substantially by CaCl 2 additions in alkaline conditions. Zeta potential measurements indicated a specific adsorption of polymers.
