Some Features of the Coagulation Water Treatment Using Dust of Electric Furnace Steelmaking

Abstract

There were described basic principles of wastewater treatment using coagulation. There were listed impurities extracted from wastewater by coagulants. There were specified features of colloidal dispersions and wastewater, give the examples of density and dispersion and particle fineness of some wastewater contaminants. There were pointed out approximate values of electrokinetic potential of dispersed pollutions of wastewater, given the characteristics of the coagulation process. As industrial waste, perspective for iron coagulant, the authors proposed a large capacity waste of Oskol electric and steel works (Belgorod Oblast), i.e. dust of electric arc furnaces (EAF). There was investigated composition, surface electrical properties EAF, and described process of coagulant getting based on the dust of EAF. There was recorded the high efficiency of turbidity reduction of milk emulsion with an iron-based coagulant from dust of EAF. There was demonstrated that degree of model emulsions’ purification is depend on coagulant dose and settling duration, mentioned intensive flocculation at adding to emulsion the optimal coagulant dose.