废铝回收双室炉的优点——为什么选用双室炉熔废铝.doc

废铝回收双室炉的优点为什么选用双室炉熔废铝AdvantagesofTCFComparingTCFtootherexistingtechnologiesformeltingscrap,esp.formeltingcontaminatedandthinscrap,theTCFhasseveralremarkableadvantages：双室熔化炉与其它废铝熔化炉，特别是在熔化含杂质废料和薄壁废料的情况下比较，有以下显著优点：1.Environmentalpollution环保方面TheprocessintheclosedchambersoftheTCFenablescompletecontrolledburningofthecontaminants.Theprocessofpyrolysthecontaminantstakesplaceinaclosedchamberwithoutanypollutiontotheatmosphereortothebuilding.ControlledburningandafterburningofthepyrolysedgasesfromScrapChamberintheHeatingChamberburnersandalsoquenchingthefluegasintheregeneratorprovideremarkablyreducedcontaminantsinthegasledtothebaghouse.双室炉的密闭双室确保处理过程中杂质燃烧得到完全控制。杂质热分解发生在密闭炉室内，不会污染大气和车间。可控的燃烧和加热室烧嘴对废料室热分解气的二次燃烧以及烟气在换热器内的快速冷却显著地减少了通向废气处理单元的污染物。2.Energyconsumption能耗Bythecoveredareaonthescrapchambertheenergyconsumptionwillbedrasticallyreduced,becauseofreducedheatlossfromthebathareatotheenvironment.Bytheintegratedregenerativesystemtheheatlosswillbereducedadditionallyandtheheatcanbeusedforheatingthefurnacedirectly.废料室能耗由于封闭熔池向环境散热的减少而显著减少。中央换热系统可进一步减少热损失，且其热能可直接用来加热炉室。Usingtheheatfromthecontaminants利用污染物的热量Theprocessofcontrollingthepyrolysisgasandburningitintheheatingchambersupportsheatingthefurnacebyusingthecombustiblescontaininginthepyrolysisgasandtherebyreducestheenergyconsumption.控制热分解气并在加热室作二次燃烧，热分解气中可燃烧成份的热量减少了能耗。3Metalloss金属烧损方面Thisfurnacehasnosaltneededforavoidingoxidationoftheliquidmetalbecauseoftheclosedscrapchamberthemetallossbyoxidationwillbereducedduetothecontrolledreductionatmospherewithinthescrapchamber.Thisatmospherewillbemaintainedforcontainingnooxygen.Nooxygenmeans,nopartnerforproducingaluminiumoxidesandthereforeallthemetalwillbemoltentobepartofthemetalbathandnotpartofthedustsendtothefilterplantandalsowillnotpartofthedrossremovedfromthefurnace.Thisisveryimportanttothin-walledscrapwhichprovidesabigsurfaceforreactionwithoxygen.该炉型不需盐作覆盖剂来避免铝液氧化，因为密闭废料室气氛为可控的还原性气氛，由氧化引起的烧损大大减少。该气氛不含氧，不含氧意味着不会产生氧化铝，因此，铝将熔于熔池，不会成为粉尘的一部分被导向废气处理设备，也不会成为熔渣的一部分被扒渣扒出。这一点对于薄壁料特别重要，因为薄壁料有更大的表面积与氧反应。Puttingthecontaminatedscrapintothebathdirectlywithoutpreheatingandpyrolysingwillincreasethemetallossbyoxidation,becausethecontaminantsarecontainingoxygen,whichwillreactwithliquidaluminiumimmediately.将含杂质的废铝在未经预热和热分解的情况下直接加入到熔池中会增加金属的氧化损失。因为杂质中含氧，直接加入到铝液中，会立刻与铝液发生反应。Theincorporationofhydrogenwillbeavoidedbecauseofnotgettingfreshaircontactingtheliquidmetal.由于没有新鲜空气与铝液接触，避免了氢气的溶入。Thespecialburnerarrangementontheheatingchamberinconnectionwiththeatmospherecontrolwillsupportanequalheatingofthebathareawithouthotspotsonthebathandwithaminimumoxygenconcentration.Hotspotsonthebathareawillincreasedrossformationandhydrogenabsorption.加热室烧嘴的特殊布置及气氛控制系统的配合使熔池表面加热均衡，不会在熔池区域形成过热点，氧浓度最低。熔池内的过热点将增加熔渣的形成和氢的吸入。4Safety安全方面Becauseofsafetyreasonstheoperationofopenbathareasshouldbehistory.Whenputtingscrapintoametalbaththismaterialshouldhavebeendriedbefore.Thisistheonlywayprovidingsafeoperationwithoutanyexplosion.由于安全方面的原因，开放式熔池已成为历史。废料加入熔池前应已被干燥，这是保证操作安全、不发生爆炸的唯一方法。Additionallytheclosedchambersupportssafeoperation.Thewetmaterialwillbepreheatedonthefurnacebridgebeforegoingtothebathandwillhavenoexplosionhappened.Allthetreatmentwilltakeplacewithintheclosedchamberandwillnothaveanyimpactontheoperatorsorequipmentinstalledaround.密闭炉室的操作安全。湿料在被送进熔池前将在炉子的炉桥上被预热，不会发生爆炸。所有处理均在密闭炉室内进行，不会对操作者及炉子周边设备产生影响。5Workingenvironment工作环境Withtheautomaticcontrolandthesophisticatedoperatingtechnologytheoperatorswillfeelcomfortable,becausetherewillbenoinconvenienceduetoheat,duetogasesescapingfromthemeltingprocesstothebuild