Electroflotation Extraction of Highly Disperse Titanium Dioxide TiO2 from Water Solutions of Electrolytes

Abstract

The electroflotation extraction of fine particles of TiO₂ and Ti(OH)₄ was studied. It was determined that in water solutions of electrolytes with pH = 2 – 12 electroflotation of TiO₂ proceeds inefficiently: the degree of extraction is 10 – 15%. The degree of extraction is 25 – 30% in the presence of surfactants and 90 – 95% in the presence of surfactants and the coagulant Fe⁺⁵. Electroflotation of Ti(OH)₄ proceeds efficiently: the degree of extraction at pH = 3 reaches 99%, the electroflotation time 5 – 10 min, and energy consumption 0.5 kW · h/m³ of solution.