Preparation and character of inorganic polymeric coagulates from fly ash by activation method

摘要

Using the main raw material of fly ash, metal scrap and waste industrial acid, with the activating method of specific self-activator, can prepare poly-ferric-aluminum-silicate(PFAS) flocculant of inorganic polymeric coagulates. Specific activator can effectively open the Si-Al bond in the fly-ash, greatly enhance the leaching rate of each element by adding a special activator (M), the added amount of M: SiO_2 = 1:3, activation time of 1 hour, activation temperature to 900°C, get the original product, on 65°C with turbid acid to stir and leach, leaching time is 2 hours, get the best rate of leaching. By Controlling Molar ratio of (Al + Fe) and Si 1:1, Silicic acid polymerization pH 1.7, by choosing the appropriate amounts of flocculants and flocculation time, can get the very good flocculation function, the light transmission rate of the handling-water may amount to more than 92.7%.