Unit3Theblastfurnaceplant剖析.ppt

Unit3 Theblastfurnaceplant SMM NEU 2020 3 25 2 Vocabulary SMM NEU 2020 3 25 3 Vocabulary SMM NEU 2020 3 25 4 Vocabulary SMM NEU 2020 3 25 5 Vocabulary SMM NEU 2020 3 25 6 Vocabulary SMM NEU 2020 3 25 7 Text Acompleteblastfurnaceplant seethefigurebelow consequentlycomprisesmanycomponents Themostimportantoftheseare theblastfurnace bunkers chargingequipment thecasthouse hotblaststoves topgasremovalandcleaningequipment 1stockhouse 2scalecar skipsystem 3systemof bells orachutebell lesstop 4offtakes 5uptakes 6downcomer 7bleeders 8dustcatcher 9gascleaningsystem 10thewatergas stovestack 11hotblastmain 12mixerline 13ringmainbustlepipe 14tuyeres 15casthouse 16trough 17ironrunner 18slagrunner SMM NEU 2020 3 25 8 Text 1 TheblastfurnaceTheblastfurnaceisacontinuouslyworkingshaftfurnace Initsoriginalform itwasslimandtulipshaped Today itssilhouetteconsistsoftruncatedcylindersandcones Blastfurnaceisalargerefractory linedsteelvesselandtheentirefurnacerequirescooling Thefollowingisanintroductiontothepartsandfunctionsofamodernblastfurnace Thefurnaceisbuiltonafoundationofpilingsandconcretetosupportthefurnaceandburden Theinsideprofileoftheblastfurnaceistermed fromtoptobottom furnacethroat shaft belly bosh andhearth seethefigureinthenextslide SMM NEU 2020 3 25 9 Text Thelowerportionofthefurnaceiscalledthehearth Thehearthcomprisescarbonsidewallandacentralcompositeplug Oneormoreironnotchesarelocatedabovethehearth andthemoltenironandslagareremovedthroughthem Abovetheironnotchistheslagnotch Withmodernlowslagvolumepractice theslagnotchistypicallyforblowing inoremergencyuseonly Theportionabovethehearthisthebosh andtheboshangleisacriticalparameterinthedesignofthefurnace Thebellyofthewidestpointcanbecooledbyavarietyofmethods Theboshandstackusuallyhaveceramiclining Thethroatiscylindricalandisreferredtoasthestocklinesection Thetopofthefurnacedirectsthegastotheofftakes SMM NEU 2020 3 25 10 Text Themodernblastfurnacehasmuchcoolingequipment suchas highdensitycoppercoolingplates cast ironstavecoolers andexternalshowercooling etc Usingwater coolingprocessathighersmeltingtemperatureaidsinmaintainingthefurnaceshapeandstructure Thedesignofthecoolingsystemandrefractoryshouldbeundertakentogether 2 BunkersorhoppersandchargingequipmentRawmaterialfromthesinterandcokeplantsarefedtoasystemofbunkers wheresinter pelletsandcokearescreenedandweightedbeforebeingchargedviaabeltsystemortheskipcar Themethodoffeedingthechargeintothefurnaceissomewhatcomplicated theobjectbeingtoavoidwastinganyoftheblastfurnacegasandtodistributethecontentsofthefurnaceevenly Thechargeishoistedtothetopofthefurnaceanddumpedontoadoublebellandthehopperarrangement Thesmallbellthenopens admittingthechargeontothelargebell Thesmallbellthencloses preventinggasfromescapingwhenthelargebellopensintotheblastfurnace Arecentdevelopmentisthebell lesstopinwhichthechargeisdistributedfromsealedbunkersatthefurnacetopbymeansofarotatingchute SMM NEU 2020 3 25 11 Text 3 ThecasthouseLiquidslagwillfloatontheironandisseparatedfromtheironbythe skimmer aftertapping Moltenironflowsundertheskimmerintoanironpoolandthenoverthe irondam totheironrunner Theslagheldupstreamoftheskimmerflowsoveraslagdamtotheslagrunner Theironandslagrunnersystemsarealsorefractory linedtrenches Themoltenironisdeliveredtoaseriesofrefractory linedhotmetalcarsfortransportationtothesteelplant Themoltenslagusuallygoesdirectlytoslagpitsadjacenttothecasthouse whereitiscooledwithwatersprays Somefacilitieslackingthespaceforlocalpitsuseslagladlestotransporttheslagtoremotepits Therearetwocriticalpiecesofequipmentinthecasthouse thetapholedrillandthemudgun Thetapholedrillisusedtoopenthetaphole Themudgunisusedtoplugthetapholeattheendofcast SMM NEU 2020 3 25 12 Text 4 HotblaststovesandblastpipesCleancoldblastairissuppliedfromablowerhousetothehotblaststoves Eachblastfurnacehasthreeorfourhotblaststoves Theairisheatedasitpassesthroughthestovestothe hotblastmain A mixerline deliversaportionofthecoldblastairtoblendwiththehotblastairtomaintainaconstanthotblasttemperaturetothefurnacethroughouteachstovecycle Thehotblastmainconnectswitha ringmainbustlepipe whichencirclesthefurnace Fromthebustlepipe thehotblastisdeliveredtothefurnacethroughaseriesofevenlyspacednozzlescalled tuyeres SMM NEU 2020 3 25 13 Text 5 TopgasremovalandcleaningequipmentThegasproducedbytheironmakingprocessexitsfromthetopofthefurnaceandisdeliveredtothegascleaningsystemviaaseriesofrefractory linedductsreferredtoas offtakes uptakes andthe downcomer Atthetopoftheuptakesareaseriesofpressurereliefvalvescalled bleeders Thedowncomerdeliversthedust ladengastothe dustcatcher whichwillremoveabout60 oftheparticulatematterinthegas Thegasthenpassestoa gascleaningsystem whichwillscrubthegas removing99 9 oftheremainingparticulate Atthispoint thegasisasuitablefuelforthestovesandotherareas SMM NEU 2020 3 25 14 Questions Whataretheimportantcomponentsoftheblastfurnaceplant Whatisthelowerportionoftheblastfurnace Doesthemodernblastfurnacehavemuchcoolingequipment Whatcriticalpiecesofequipmentarethereinthecasthouse Whatwillfloatontheironandisseparatedfromtheironbythe skimmer aftertapping Howmanyhotblaststovesdoeseachblastfurnacehave SMM NEU 2020 3 25 15 Exercises I TranslatethefollowingexpressionsintoEnglish 1 高炉车间2 出铁场3 热风管4 炉身5 炉腹角6 撇渣器7 导出管8 铁沟9 渣池10 泥炮11 除尘器12 无钟炉顶13 铁口14 旋转溜槽15 皮带系统 SMM NEU 2020 3 25 16 Exercises II Fillintheblankswiththewordsfromthetext Thefirstletterofthewordisgiven 1 Acompleteblastfurnacep consequentlycomprisesmanycomponents 2 Thelowerportionofthefurnaceiscalledtheh 3 Theb isthewildestpointofthefurnace itcanbecooledbyavarietyofmethods 4 Thesmallbellopens admittingthechargeontothelargeb 5 Moltenironandslagproducedintheblastfurnaceareremovedandseparatedinthec 6 Therearetwocriticalpiecesofequipmentinthecasthouse thet drillandthem 7 Themodernblastfurnacehasmuchc equipment suchashighdensitycoppercoolingplates cast ironstaves externalcoolingchannels orshowercoolingetc 8 Thehotblastmainconnectswitharingmain b pipe whichencirclesthefurnace 9 Thegasproducedbytheironmakingprocessexitsfromthetopofthefurnaceandisdeliveredtothegasc systemviaaseriesofrefractory linedductsreferredtoas offtakes uptakes andthe downcomer 10 Blastfurnaceisalargerefractory linedsteelv andtheentirefurnacerequirescooling SMM NEU 2020 3 25 17 Exercises III Fillintheblankwiththewordslistedbelow notchsupportbleedersundertakenceramicskimmerdoubleplug1 Thefurnaceisbuiltonafoundationofpilingsandconcreteto thefurnaceandburden 2 Abovetheironnotchistheslag 3 Betweentheboshandlowerstackusuallyhasa lining 4 Thedesignofthecoolingsystemandrefractoryshouldbe together 5 Thechargeishoistedtothetopofthefurnaceanddumpedontoa bellandhopperarrangement 6 Liquidslagwillfloatontheironandisseparatedfromtheironbythe inthecasthouse 7 Themudgunisusedto thetapholeattheendofthecast 8 Atthetopoftheuptakesareaseriesofpressurereliefvalvescalled SMM NEU 2020 3 25 18 Exercises IV Decidewhetherthefollowingstatementsaretrue T orfalse F 1 Theinsideprofileoftheblastfurnaceistermed fromtoptobottom furnacehearth shaft belly boshandthroat 2 Liquidslagwillfloatontheironandisseparatedfromtheironbythe skimmer inthecasthouse