用dem模擬和實(shí)驗(yàn)?zāi)Ｐ万?yàn)證圓錐破碎機(jī)的性能評(píng)估-畢業(yè)論文外文翻譯

1、翻譯部分翻譯部分英文原文英文原文ConecrusherperfmanceevaluationusingDEMsimulationslabatyexperimentsfmodelvalidationKeywds:ConecrusherDEMValidationExperimentSimulationModellingAbstract：Conecrushersarecommonlyusedfsecondarytertiarycrushing

2、stagesintheaggregateminingindustry.Ithaspreviouslybeendemonstratedthatthediscreteelementmethod(DEM)canbeusedtosimulaterockbreakageincrushersusingavarietyofmodellingtechniques.Indertoprovideconfidenceinthesimulationresult

3、stheDEMmodelsneedtobevalidatedagainstexperimentaldata.Suchvalidationefftsarescarcelyreptedintheexistingliteraturetherearenostardizedproceduresdefined.InthispaperalabatyconecrusherissimulatedusingDEMtheresultsarecomparedw

4、ithlabatyexperiments.TherockmaterialismodelledusingtheBondedParticleModelapproachcalibratedagainstsingleparticlebreakageexperiments.Twocasesimulationshavebeenperfmedinvestigatingtheinfluenceofeccentricspeed.Thelabatycrus

5、herisaMgrdshammarB90conecrusherthathasbeenequippedwithcustommachinedlinersvariablespeeddriveaNationalInstrumentsdataacquisitionsystem.Theresultsprovidenovelinsightregardingthestochasticflowbehaviourofparticleswhenexitedb

6、ythemantleathighfrequency.TheestimatedproductsizedistributionmatchestheexperimentalresultsrelativelywellwhenevaluatingthecrespondingcoarseregionthatisfeasibletocalculatefromtheDEMproductdisgedata.1.IntroductionTheconecru

7、sheristhemostcommonmachinetypefsecondarytertiarycrushingofhardrockmaterialsinthemineralsprocessingindustry.Duringrecentyearsmineralsprocessingexpertsengineershaveshownanincreasedinterestintheoperationofprimarysecondarycr

8、ushingpotentialefftstooptimizetheperfmanceoperationhavefollowed.Thisinterestdirectsfocusonmodellingsimulationcapabilitiesindertoprovideaccuraterobustpredictions.Modelscommonlyrangefromrelativelysimpleempiricalanalyticalm

9、odelstomechanisticanalyticalmodelsnumericalmodelswhichfinstanceutilizethediscreteelementmethod(DEM).Therequiredqualityapplicabilityofthedifferentmodellingapproachesdependsonwhyitisapplied.Ifthemodelisusedinafastsimpleste

10、adystatesimulationafittedempiricalsizereductionmodelmaybeenoughatleastifthepredictioncapabilitylimitationsarewellunderstoodconsidered.IncaseswherefinstancetheinfluenceoncircuitperfmancedueEvertsson20162010Quistetal.2011)

11、.TheBPMmodelisimplementedonclustersofsubparticlesassembledwiththeshapefrom3Dscannedrockparticles.ThemicropropertiesoftheBPMmodelwerecalibratedagainstsingleparticlebreakageexperimentstheresultshavebeencomparedtoindustrial

12、scaleexperiments.TheexperimentswereconductedonaSvedalaH6000conecrusherthepowerdrawpressuresignalsweremeasuredusingacustomdataacquisitionsystemwithasamplingrateof500Hz.TheseattemptstodevelopavalidatedDEMmodelstructurefcom

13、pressivebreakageinconecrushershavebeencontinuedinlabatyscaleexperimentsusingaB90MgrdshammarconecrusherbyJohanssonQuist(Johanssonetal.2015).Inthementionedwktheeccentricspeedofthemantlewasinvestigatedatlevelssignificantlyh

14、igherthannmalfconecrushers.ItwasfoundthattheiginallinerdesignwithadistinctshtparallelzoneintheCSSregionwaspossiblysuitableflabatysamplesizereductionpurposeshoweverlesssuitableftheinvestigationofhighspeedcrushing.Anewline

15、rdesignCADmodelwasdevelopedwithcontinuouslinersurfacesthisdesignwasevaluatedusingDEM.Inthiswknewlinercomponentshavebeenmachinedtwolabatyexperimentshavebeenconductedateccentricspeeds10Hz20Hzwithaclosesidesettingof2.2mm.Th

16、eeccentricthrowofthecrusherisfixedat4.3mm.ThecrespondingcasehasbeenmodelledinDEMthemainscopeofthispaperistocomparethelabatyresultwiththeDEMsimulationresults.ThiscomparisonisbothofscientificvalueintermsofDEMvalidationbuta

17、lsointermsofunderstingthemechanicsphenomenaofhighspeedconecrushing.Themotivationfexplingconecrushingathigherspeedsistoinvestigateifitispossibletocapitalizeontheincreasednumberofsingleparticlebreakagecompressionevents.Ith

18、aspreviouslybeenshownthatsingleparticlebreakageissuperiintermsofenergyutilizationwhencomparedtofinstancesingleparticleimpactbreakageinterparticlebedbreakage(Schnert1972).ThelayoutconfigurationofthispaperfollowstheIMRDCst

19、ructurewherethemethodologyoftheexperimentsDEMmodellingisfirstpresented.InthesubsequentsectiontheexperimentalresultsareshownfollowedbytheDEMsimulationresults.Finallytheexperimentalsimulationfindingsarediscussedconclusions