The Preparation Research On Polymeric Aluminum Ferric Silicate Flocculant By Fly Ash

1. The solubility promoter NaCl,NaF,CaO,Na2CO3 effects were compared By measuring solubilization ratio of aluminum and ferric. The Na2C03 melting methods used to increase the acid lixiviate property of fly ash were put forward。2. The researches on the optimums technology of solubility promotes and acid dissolves showed us that When Na2CO3/SiO2 ratio of 0.5, 60 minutes baking time, the temperature at 900 oC, the solubilization ratio of aluminum and ferric and silicon reaching highest .Through orthogonal experiments, the best acid dissolves conditions was 4mol/l HCL, Stired at 110°C for 1 hour.3.During the study of synthesize of the flocculants made from fly ash , the best technology conditions were studied by orthogonal experiments. Si:AL(mol:mol)=1:0.5 ,Si:Fe(mol:mol)= 1:0.5, pH value of the flocculants=1.1, ageing temperature=60 oC, ageing time=2hour.4.The influence of Dosage,simulative wastewater pH the kind of clay on the flocculation effect was studied by using synthesized flocculants and simulative wastewater . The synthesized flocculants compared with the PAC and PFS results showed : homemade flocculantion effect are clearly better than the other two.