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1、Effectofiron〉contentinsphaleriteonflotationAbstractTheeffectofsubstitutedinthe?mineral>lattice,onthefrothflotationofsphaleritehasbeeninvestigatedatalkalinepH.Ithasbeenfoundthatacriticalcoppersulphateconcentrationexistswheresphaleriterecoveryismaximized,abovewhichthereco
2、veryofsphaleritethendecreases.Thepresenceofironinsphaleriteisdetrimentaltotherateofsphaleriteflotationandhenceitsrecovery,withthecoarserparticlesbeingmoreaffectedthatthefines.Thepresenceofiron?reducestheactivationofsphaleritebycopper,whichinturnresultsinareductionincoll
3、ectoradsorption.Keywords:Frothflotation;Flotationactivators;Flotationkinetics;ParticlesizeArticleOutline1.Introduction2.Experimentalsection3.Resultsanddiscussion4.ConclusionsReffewnces1?IntroductionAsxanthatecollectorshavearelativelylowaffinityforzincions,activationofsp
4、haleritebycopperionsisgenerallyrequiredtofloatsphalerite.Theactivationofsphaleriteinvolvestheexchangeofzincforcopperions,thusprovidingasurfacereceptivetowardscollectoradsorption(Finkelstein1997).Oneofthemainimpuritiespresentinsphaleriteis^iron,>whichsubstitutesforzincat
5、omsinthesphaleritelattice,thusreducingthenumberofzincatomsavailableforexchangewithcopper.Previousstudiesinvestigatingtheeffectof?ironcontentinsphaleriteoncopperactivation,collectoradsorptionandsubsequentsphaleriteflotationhaveproducedconflictingresults(Pomianowskietal^1
6、975-MukherjeeandSeru1976°Soleckietal“1979.Nakahio1980、HarrisandRichter1985andGigowskietaL1991).Forexample,bothanincreaseanddecreaseincopperactivation,collectoradsoiptionandfrothflotationofsphaleritehavebeenreportedwithincreasingironcontentinsphalerite.Thelossofsphalerit
7、etotailingsinflotationcircuitsasaresultofinadequateparticlesurfacehydrophobicityreducestheeconomicviabilityoftheprocessingoperation.Thusanunderstandingoftheeffectthatironinsphaleritehasontheflotationbehaviourofthismineralmayallowustomaximisesphaleriterecovery?Intheprese
8、ntstudy,wehaveinvestigatedtheeffectofironcontentinsphaleriteonsphaleriteflotationasafunctionofparticlesize.The
