APPLICATION AND PROSPECTS FOR EXPANDING THE USE OF SOLVENT EXTRACTION IN THE PROCESSING OF WASTE AND INDUSTRIAL SEMI-PRODUCTS OF THE RUSSIAN ARCTIC ZONE NON-FERROUS METALLURGY

The overview briefly presents the history of solvent extraction (SX) technologies introduction at the Russian Arctic’s copper-nickel industry. The main developments of recent years in the field of SX of the in-dustrial wastes and semi-products such as acid substandard effluents, ferrous cakes, metallurgical slags, etc., as well as rare and platinum metals-containing waste, are also briefly shown. In particular, hydromet-allurgical method of sulfuric acid SX recovery from copper waste electrolyte with fatty alcohol-based extractant was proposed and laboratoryscale tested. General circuit for copper and palladium SX from waste solutions by kinetic-modified (synergist) hydroxyoxyme-based ex-tractant was developed, etc. It was concluded that there were favorable prospects for the introduction of SX technologies in the field of waste disposal, additional valuable products obtaining and increasing the complexity of raw materials processing while reducing the load on the ecology of the Arctic zone.