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红土镍矿深度还原-磁选工艺富集镍和铁（英文）.docx

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红土镍矿深度还原-磁选工艺富集镍和铁（英文） Redsoilnickeloreiswidelydistributedintheworld,especiallyintropicalandsubtropicalregions.Thedeepreduction-magneticseparationprocess(DRMS)hasbeenwidelyusedtoenrichbothnickelandironfromredsoilnickeloreduetoitsuniqueadvantages,suchashighyield,lowenergyconsumption,andenvironmentalfriendliness. Firstly,theDRMSprocessinvolvesheatingtheredsoilnickeloreatahightemperatureinareducingatmosphere,followedbyamagneticseparationprocesstoremovetheironparticlesandrecoverthenickelconcentrates.Thereductionofnickeloxideintheoretometallicnickelbyreactionwithsolidcarbontoformcarbonmonoxideandnickelcarbonyliscriticalinthisprocess. TheDRMSprocesshasmanyadvantagesoverotherprocesses,suchaslowenergyconsumptionandsimpleequipment.Thereductionofthenickeloxidetonickelcarbonyloccursinthereductionfurnace,whichisaclosedcontainerthatcaneffectivelycontroltheatmosphere,reducingtheoxidationofnickelandiron.Thecarbonusedinthereactionisusuallyintheformofcoke,reducingtheenergyconsumptionoftheprocess.Besides,themagneticseparatorisasimpleandeasy-to-operateequipmentthatcanseparateironfromnickelconcentrateaccurately. Secondly,theDRMSprocessissuitablefortheenrichmentoflow-gradeandrefractoryredsoilnickelores.Duetotheuniquegeologicalformationofredsoilnickelore,itcontainsalotofclayminerals,suchaskaoliniteandillite,whichcanadsorbanddestroythestructureofthenickelsulfideminerals.Therefore,thenickelgradeofredsoilnickeloreisusuallylow,andthenickelmineralsarecloselyassociatedwithotherminerals,makingitdifficulttoextract.TheDRMSprocesscaneffectivelyseparatenickelandironmineralsandproduceahigh-gradenickelconcentrate. Lastly,theDRMSprocesshassignificanteconomicandenvironmentalbenefits.Asmentionedabove,theDRMSprocesshaslowenergyconsumption,whichcansignificantlyreducetheproductioncost.Besides,theprocessissimpleandrequireslessinvestmentinequipment,makingitappealingtosmallandmedium-sizedminingenterprises.Moreover,theDRMSprocesscaneffectivelyreducethedischargeofpollutants,suchasSO2,NOx,andCOD,intotheenvironme