Method of preparing compound flocculating agent by utilizing fly ash and killing pickle
A technology of composite flocculant and pickling waste liquid, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of waste of resources, pollution of the environment, and incomprehensible utilization of enterprises, and achieve good results
Inactive Publication Date: 2013-11-06
宫惠峰
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The invention discloses a method of preparing compound flocculating agent by utilizing fly ash and killing pickle. The method comprises following steps: (A) burning: adding fly ash and Na2CO3 in a crucible to make aluminum and silicon in the fly ash turn into more activated amorphous state or crystal; (B) acid soaking: adding killing pickle into the burned fly ash, stirring and then filtering in a constant temperature water bath, obtaining acid soaked filter liquid and filter slag, drying and grinding the filter slag; (C) alkali dissolving: adding the filter slag into an alkali solution to boil, then filtering the reaction liquid, and obtaining the filter liquid, which is the sodium silicate solution; (D) adding acid to polymerize: adding waste acid in the sodium silicate solution to adjust pH value and then having polymerization reactions under stirring, and obtaining the polysilicic acid solution; (E) mixing the polysilicic acid solution and the acid soaked filter liquid, stirring, curing and obtaining a reddish brown gel liquid, which is the compound flocculating agent. The invention is aimed to provide a preparation method, which has a simple technology and can effectively utilize fly ash and killing pickle in iron and steel plants.
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