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外文翻译--衬板的新发展情况和趋势 英文版【优秀】.pdf

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外文翻译--衬板的新发展情况和趋势 英文版【优秀】.pdf

CrushingandGrinding2002ConferencePage1CRUSHINGANDGRINDING2002CONFERENCENewDevelopmentsAndPracticesInLiftersAndLinersINTRODUCTIONThemineralprocessingindustryisinthemidstofarevolution,agrindingplantrevolution.Majorbreakthroughsinbothmetallurgicalperformanceandoverallgrindingplantavailabilityareundeniable.Thefullbenefitsofthesedevelopmentsarenotwidespread.Metallurgicalperformanceisbeingenhancedbysuperiormilloperatingmodellingbythediscreteelementmethodwhich,incertainapplications,encouragestheuseoffewer,shelllifterrowswithhigherlifterheights.Thisresultsinlargerandheavierliners.Overallplantavailabilityandutilisationarebothenhancedbyfundamentalmillsystemsequipmentqualityandreliabilityacredittomillmanufacturersandplantmaintenancepersonnelandfaster,safer,relinetimesusingRMEswornlinerremoval,newlinerplacementMillReliningSystem.Thispaperdefines,asRMEbelieves,thefinalfrontiersoflargegrindingmillreliningpracticeswithaparticularemphasisontheteameffortrequiredofallinterestedparties.MineralGrinding–AComplexGameofferingworthwhileprizesGrindingplantdesign,construction,operationandmaintenanceareeachcomplexactivitieswheneachisreviewedindividually.Whencombined,thecomplexitiesmayseemoverwhelmingandsomeissuesareperhapsoverlooked,especiallyduringtheheavyworkloadofnewplantdesignandconstruction.ThispapernominatesalltheinvolvedpartiesthePlayersinasuccessfulmillreliningTeamandprovidesafoundationdocumentforfuturediscussioninthisarea.RMEwillprovidethispaper,andsubsequentupdatedversions,asareferencesourceatboththewww.gomillsworld.comandwww.rmeq.com.auwebsites.AsinanycomplexGame,thisTeamofPlayerscombinetheirindividualskillstoachieveasuccessfuloutcome,ie.apodiumfinishintheworldseries,annualmillutilisationcontest.ThePlayersinaSuccessfulMillReliningTeamForagreenfieldsgrindingplantproject,theTeamplayersare1.ProjectOwner2.ProjectManager3.MillSupplier4.LinerSupplierCrushingandGrinding2002ConferencePage25.PlantOperatingPersonnel6.PlantMaintenancePersonnel7.MillReliningCrew8.MillReliningSystemSupplierRMEForanexistinggrindingplantoperation,theProjectManagerhasnofurtherinfluence,reducingthefieldtoseven7Players.TheProjectOwnershouldhowever,nominatearemainingPlayer,probablythePlantOperator,toreviewtheProjectManagersareasofresponsibility.ThecontributionofeachPlayertotheTeamsoverallsuccessisnowdiscussedindetail.1.PROJECTOWNER1.1ThinkingbeforebuildingTheProjectOwner,theultimatebeneficiaryofworldclassgrindingplantperformance,willfacemanydecisionsregardingexpenditureofProjectCapital.OnlytheOwner,throughthosedecisions,possessesthepowertoinfluenceallotherPlayers.Somedecisionswillhaveapositiveinfluenceonthefinaloutcome.Somedecisionswillhaveanegativeeffect.Thosedecisionswilldetermineplantperformance,availability,utilisationandsafety,sometimesfortheentiredurationofthegrindingplantslife.Inotherwords,poordecisionsmayembodyirreversibleandnegativeeffectsonoperationalandmaintenanceoutcomesincludingmillrelining.TheOwnermustfirstconsidertheimportanceofgrindingplantperformanceandavailabilitytotheoverallproject.Afewoperations,notablyaluminarefineries,havebeenknowntoinstallasparemillandarethereforenotexposedtotheusualgrindingmillavailabilitydemandstomaintainthroughput.Usually,millavailabilityiscriticalandespeciallysoinamoderngrindingplantequippedwithasingle,large,primarymill.If,afterconsideration,grindingplantperformanceandavailabilityaredeemedimportant,therolesofeachotherPlayermustbeconsideredandtheirpotentialsoptimised.TheOwnerwillberequiredtoworkespeciallycloselywiththeperhapsconservativeProjectManager.BothOwnerandProjectManagershouldmakethemselvesawareofallrecentdevelopmentsinthisarea,eg.amovetowardsignificantlylargermilllinersmadepossible,inpart,byRMEswornlinerremoval,newlinerplacementMillReliningSystem.SimplythinkingaboutreliningissuesatthebeginningoftheProjectwillrevealmanyopportunities.Givenalittleconsideration,thefullpotentialofallotherTeamPlayerswillbereleasedateachandeveryrelineandforthelifeoftheplant.Anextra13annualplantutilisation,wonthroughefficientmillrelining,istheprizeonofferforsuchthoughtatthedesignstage.CrushingandGrinding2002ConferencePage31.2AnexampleoftheconsequencesofnotthinkingattheplantdesignstageTheOwnerofProjectXYZdoesnotconsidermillreliningissuesanddoesnotbrieftheProjectManagerregardinganyparticularwishesinthisarea.TheXYZProjectManageralsodoesnotconsidermillreliningissuesandseeksgrindingmillsupplyviaaSpecificationwhichdoesnotcontainmillreliningrequirements.TheMillSuppliersallengagedinacompetitivebusinessseekthelowestinitialcostsolutioninordertowinthemillsupplycontract.Forsomesuppliers,theirsolutionincludesplacingthemillmotoralongsidethemillshell.Thisarrangementisvisuallycompactandappealing,promisingasmallerplantbuildingandsignificantcostsavings.TheProjectManagerawardsthesupplycontracttoaMillManufacturerofferingthiscompactarrangementanddesignsthegrindingplanttosuit.Anotherplantrequirementisathroughplantapertureforliftingequipmentfromthegroundfloortootherplantlevels.Thisliftingwellisplacednexttothemill,denyingthemillreliningcrewaccesstothenonmotorsideofthemill.PleaserefertoFigure1.1.Platforms,withinthethroughplantcranewell,arenotpossiblesincethewholeclearapertureisrequiredduringshutdowns.Figure1.1PlanviewofanillconsideredplantlayoutwithrespecttomillreliningactivitiesCrushingandGrinding2002ConferencePage4Unfortunatelyandforevermore,millreliningcrewsaresentencedtoworkingbetweentheconfinesofmillshellandmillmotor.Theyfaceconstantexposuretoincreasedphysicalriskandmechanizedlinerboltremovalisprecluded.Reliningtimesarealwayslongandaccidentsnotuncommon.1.3Summary–theProjectOwnersopportunitiesTheProjectOwnermustconsidergrindingplantavailabilityanditsimportancetoplantperformanceandultimately,profitability.TheProjectOwnermustworkcloselywiththeProjectManagertoensureallissuesrelatingtogrindingmillreliningareconsideredandaddressedviathesupplyspecificationdocumentsrelatingtomillsupply,associatedplantsupplyandthedetaileddesignoftheadjacentplant.Thispaper,providedinaconstantlyupdatedformatatwww.gomillsworld.comandwww.rmeq.com.auwebsites,canservebothasasetofguidelinesandachecklistfortheProjectOwnerandtheProjectManager.Constructivecriticism,towarddevelopingacompleteandaccuratechecklist,iswelcomed.2.PROJECTMANAGERProjectManagersareconstantlydevelopingtheirexpertiseinawiderangeofareas,includingthoserelatingtogrindingmillplantdesignandmillreliningissues.Mostmoderngrindingplantsareeasytoworkwithinandproduceexcellentresults.TheProjectManagerssupplyspecificationdocuments,includedineveryRequestforQuotationRFQ,willdefinethefutureoutcomesforhisclient,theProjectOwner.Innoparticularorder,theProjectManagerskeyquestionsandresponsibilitiesregardingtheperformanceoffuturemillreliningactivitiesinclude2.1Millsupplycontracttechnicalissuesrelatingtomillrelining2.1.1ObstaclesDothemillmotorsorothermillcontractsupplyitemsimpedeLinerboltremoval/replacementincludingaccessfortoolssuchasRMEsTHUNDERBOLTrecoillesshammers

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