Study On The Flotation Separation Of Copper Nickel Sulfide Mineral And Multiple Magnesium Silicate

It is the main feature that copper,nickel minerals and kinds of gangue minerals coexist in copper nickel sulfide ore.The complex ore properties,and general coexistence phenomenon of talc,serpentine and chlorite magnesium silicate mineral make the existing beneficiation technology unable to meet the poor ore for efficient development and utilization.This paper mainly studies the flotation separation of copper nickel sulfide minerals and multiple magnesium silicate minerals,through the investigation of dispersant and inhibitor influence on magnesium silicate interaction,revealing the regulation mechanism of component selective aggregation / dispersion and synchronization suppression in the complex system of copper nickel sulfide minerals and multiple magnesium silicate coexist,the formation of "component selection Dispersed and magnesium silicate sync suppression " new technical solution,in order to realize the effective separation of copper nickel sulfide minerals and multiple magnesium silicate gangue lay a theoretical basis.The chalcopyrite,pentlandite,serpentine and talc were used as the object dispersant,inhibitor in multiple flotation system of sulfide minerals and magnesium silicate minerals was added to achieve the flotation separation between sulfide minerals and multiple magnesium silicate minerals.The flotation test,X-ray diffraction(XRD),zeta potential,organic carbon test and Fourier transform infrared(FT-IR)research methods are adopted,copper nickel sulfide minerals and multiple magnesium silicate mineral flotation behavior and inhibition mechanism were researched,draw the following conclusions.Acidifiedified sodium silicate is an effective inhibitor of serpentine,relatively weak inhibition of talc,chalcopyrite and pentlandite;Starch acetate can very good inhibition of talc and serpentine,small amount of the starch acetate with weak inhibitory effect of chalcopyrite and pentlandite,when the dosage of starch acetate is greater than or equal to 100 mg·L-1,it shows strong inhibition of chalcopyrite and pentlandite;When(Acidifiedified sodium silicate + starch acetate)composite inhibitor dosage for(50 mg·L-1 + 50 mg·L-1),it can better realize the effective separation of copper,nickel sulfide minerals and multivariate magnesium silicate mineral composition of mixed ore.The acidified sodium silicate can significantly change surface electric of serpentine.when pH<10.31,joining the acidifiedified sodium silicate,the surface potential of serpentine changed from positive to negative,weakening the heteroaggregation of serpentine with talc,chalcopyrite and pentlandite,solving the key issues of slime cover on the surface of copper nickel sulfide mineral in flotation of copper nickel sulfide ore.Starch acetate can adsorption in the talc and serpentine,chalcopyrite,pentlandite surface;When the dosage of starch acetate is 50 mg·L-1or less,the restraint strength of the four kinds of single mineral is as follows talc?serpentine?pentlandite?chalcopyrite;When the dosage of starch acetate be equal or greater than 100 mg·L-1,it shows strong inhibition of four kinds of minerals,especially significant for talc.Acidified sodium silicate is adsorbed on the surface of talc only by physical adsorption,and the adsorption of serpentine,chalcopyrite and pyrite is combined action of physical and chemical adsorption;The starch acetate is adsorbed on the surface of talc,serpentine,pentlandite and chalcopyrite by physical adsorption.