STUDY OF THE EFFICIENCY OF ELECTROFLOTATION PROCESS ON A MIXTURE OF HEAVY HYDROXIDES AND NONFERROUS METALS IN VARIOUS ELECTROLYTES

The features of electroflotation extraction of a mixture of heavy hydroxides and non-ferrous metals (Fe 2+ , Ni 2+ , Zn 2+ , Co 2+ , Cu 2+ ) from a five-component system in the presence of various background electrolytes were studied. The influence of the nature of various background electrolytes on the kinetics of electroflotation extraction of the mixture of the studied hydroxides at pH=10 was established. It is shown that the addition of NaCl electrolyte can increase the efficiency and stabilize the electroflotation process of extraction of hard-to-dissolve heavy and non-ferrous metal compounds as part of multi-component systems from the wastewater of various electroplating plants, the recovery rate can reach to 99%. The conducted research shows the principal possibility and high efficiency of the process of electroflotation extraction of a mixture of insoluble compounds of copper, zinc and cobalt in the form of hydroxides. after electroflotation recovery