Mathematical modeling of conditions for iron extraction from ash and slag waste of heat power plants

Troeglazova Anna Vladimirovna, Vihareva Nadezhda Anatol’evna

The possibility of extracting iron ions from the ash and slag waste of thermal power plants obtained by burning brown coal is estimated. The method of probabilistic-determined multi-factorial design of the experiment was used to study the effect of the concentration of sulfuric acid, the duration of the leaching process, the proportion of ash and slag waste in the mixture (T + F), the concentration of sodium chloride and its fraction in the mixture. The significance of the influence of all these factors, except for the fraction of sodium chloride in the mixture, on the degree of analyte extraction from ash and slag waste of thermal power plants into the solution was established. The degree of analyte recovery under established optimal conditions was 92%.

Keywords:ash and slag waste from thermal power plants, extraction, iron, multi-factorial design of the experiment, Protodyakonov equation, sample preparation