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1、外文资料翻译PortlandCementPreparationofRawMaterials1.CrushingTherawmaterialsasreceivedfromtheminesareinlumpformandhavetobecrushedbeforefinegrinding.Thesizeofthelumpswoulddependupontherawmaterialandthemethodofmining,sothesizeofthecrushingequipmentusedwoulddependpri
2、marilyuponthesizeofthelumpsreceived.Inamoderncementfactory,manufacturing1000to2000tonnesofcementperday,thelimestoneisminedbymechanicalmeansandhencethesizeofindividualpiecesmaybe1meterorso.Insmallerfactories,theminingoflimestonemaybemanualandthesizeofindividu
3、alpiecesmaybe200mmorso.Similarly,clay,shale,bauxite,laterite,sandstone,coal,gypsum,etc.maybereceivedinsizesnotlargerthan300mm.(a)LimestoneCrushers:Therequirementoflimestoneperdayfora2000TPDfactorymaybeabout2600to3000TPD,fora1000TPDfactory1300to1500TPDandfora
4、300TPDfactory400to450TPD.Astheminingoperationhastobecarriedoutindaylighthoursonly,thecrushingoperationshouldalsobecarriedoutinthe10or12hoursoflightperday.Thecapacityofalimestonecrusherfora2000TPDfactorymaybe300TPH,fora1000TPDfactory150TPHandfora300TPDfactory
5、50TPH.Thedecisiononthetypeoflimestonecrusherwoulddependuponthephysicalpropertiesofthelimestone;however,forsmallerfactoriesusingmanuallyminedlimestone,singlestageHammerCrushersaremostsuitable;butforlargerfactoriestwostagecrushingisalwaysmoreeconomicalandmoree
6、fficient.ThefirststagemaybeaJawCrusher,GyratoryCrusherorImpactCrusherandthesecondstageaHammerCrusherorConeCrusher.Ifpossible,ascreenofsuitablesizemaybeintroducedafterthesecondarycrushertoallowonlyundersizetogoforfurtherprocessingwhileoversizeisreturnedtothec
7、rusher.Atypicalflowsheetforalimestonecrushingplantina2000TPDfactorymaybe.Dumpers--FeedHopperwithLaminatedconveyoratthebottom300TPHJawCrusher(feedsize1000mm-productsize200mm)300TPHHammerCrusherorImpactCrusherorConeCrusher(feedsize200mm--productsize20mm300THPV
8、ibratingscreenacceptsminus20mm--oversizebacktocrusher.Properdedustingarrangementsmustbemadeatthecrushers,thevibratingscreenandthetransferpointsandaDustCollectorwithfaninstalled.Powerconsumedfort
