The Mechanism And Flotation Behavior Of The Surface Oxide Copper-nicked Sulfide Ore

Copper-nickel sulfide ore properties generally more complex, sulfide minerals can be floating between the similar purpose of the mineral itself apparent surface oxidation, coupled with inevitable ion stimulation, mudding affect gangue minerals, resulting in copper a nd nickel mineral flotation recovery and difficult to separate, for paper systematically studied the mechanism of copper sulfide nickel ore flotation behavior and surface products investigated pentlandite and chalcopyrite in a self- induced and induced flotation conditions flotation behavior and surface oxidation products, for comprehensive recovery of copper sulfide nickel ore provides the foundation for improving the utilization of the significance of a major copper-nickel resources. The main contents are as follows:(1) Self-induced flotation conditions, nickel pyrite in near neutralslurry floatability of chalcopyrite is best, but only in the high alkaline conditions poor flotability are respectively when Ph=4.01, 6.86, 9.18,chalcopyrite and pentlandite flotation potential range by potentialre gulation is similar. Difficult to separate.(2) In the collector inducing conditions, pentlandite in the whole p H range can be floating, but still under neutral p H conditions the maximum flotation recovery, and chalcopyrite in the whole p H values were Flotability better than when self- induced and, chalcopyrite and pentlandite floatability potential range was wider.(3) In the self- induction and flotation systems, pulp potential with increasing p H value decreases, sulfide minerals can only have a float in a certain potential range, too high or too low will affect the mineral floatability sex, and in the flotation of sulfide minerals system can float interval greater than the range of floating water system.(4) The results of cyclic voltammetry chalcopyrite and pentlandite suggests, in an aqueous system, the product of sulfide ore hydrophobic surface elemental S, mineral electrode surface is oxidized to elemental S interval and minerals can float basically the same potential range; in butyl xanthate system, the product of sulfide ore surface hydrophobic butyl dixanthogen, when the potential of high sulfur mineral surface will be excessively oxidized S2O32- or SO42-, make mineral surfaces hydrophilic.(5) The use of infrared spectroscopy to further define the product pentlandite and chalcopyrite after xanthate with butyl mainly dixanthogen, which results thermodynamics and cyclic voltammetry tests is consistent. Pulp potential in a certain range, the intensity of the infrared spectra of the surface of the product, the adsorption and flotation recovery had some correspondence between the surface and the type of product does not change with pulp potential change.Through this study, can be more in-depth understanding of the mechanism of copper nickel sulfide ore potential controlled flotationbehavior and butyl xanthate, laid the foundation for the application ofpotential control flotation in complex in copper nickel sulfide ores, and provides theoretical guidance for the actual production of the mine...