Abstract
The paper gives the results of a study on the processing of model systems by a coagulating suspension made on the basis of dust from electric arc furnaces (EAF). Dust of electric furnace steelmaking is a large-tonnage waste containing in its composition a large number of iron compounds. When treating EAF with hydrochloric acid, formed ions FeOH+, FeOH2+, [Fe(OH)2]+ in this process provoke coagulation, which leads to the adhesion of particles in the system and their sedimentation. It is shown that the suspension is effective for clarifying aqueous media from suspended particles (kaolin clay). It has been established that precipitation occurs more effectively in a neutral and alkaline environment than in an acidic one. When processing multicomponent model systems (industrial oil stabilized with sodium lauryl sulfate and clay particles), the efficiency of clarification decreases, but remains high enough (65%). Taking into account the research results, the coagulating suspension can be used at the stage of pre-treatment of highly contaminated sewage of mixed composition to facilitate and reduce the cost of subsequent stages of water treatment.
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