Azo Derivatives of Phenol and 1-Naphthol as Flotation Collector of Sulfide Ore of Non-Ferrous Metals

Nine heterocyclic and aromatic azo derivatives of phenol and 1-naphthol were studied as flotation collectors of sulfide ores of non-ferrous metals. The constants of acid dissociation of compounds in aqueous solutions and their solubility in alkaline media are determined. It has been established that the adsorption of reagents on the surface of sulfide copper-nickel ore has a physical character. The adsorption constants are calculated. It is shown that the reagents under study exhibit collective properties with respect to the sulfide minerals of copper, cobalt and nickel. The use of mixtures of azo compounds with potassium butyl xanthate leads to an increase in both the recovery degree and the quality of the concentrate for nickel and copper in comparison with a single butyl xanthate.