[Utilizing fly ash to prepare polysilicon acid and compounded PFS and the study of its properties].

Fly ash which is a kind of solid waste of power station in Dalian was prepared as polysilicon acid, and compound polymerized ferric sulphate and its properties was studied. Fly ash was dipped in NaOH solution. The effects of temperature, concentration of NaOH solution and reactive time were examined respectively on the conversion efficiencies of silicon.