学科分类
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20 个结果
  • 简介:增加的人口和单个财富为精力和原料资源以及为鉴于资源的有效使用,处理技术并且在生产避免排出物并且再循环过程的稳定的改进导致了一个更高的要求。Presentsituation和再循环处理的未来趋势被例子从铝和钢工业讨论,汽车和消费者以后的市政的恢复再循环。热力学的法律并且4E策略的更多的强烈遵守的重要性“经济”,精力,环境和教育被构画出。

  • 标签: 工业进程 再循环 环境 持续能力 球循环
  • 简介:Itisoftenstatedthatevencleantokamakdischargesdisruptathighdensity.Onepossibilityisthatsuchdisruptionresultfromtheenergylossarisingfromhydrogenrecyclingattheedgeoftheplasma.thisenergylosscouldleadtoacontractionofthecurrentchannelandtheproductionofadisruptivelyunstableconfiguration.

  • 标签: 循环效应 HL-1M 托卡马克装置 放电分布 等离子体
  • 简介:Inthispaper,thejointproductionandrecyclingproblemisinvestigatedforahybridmanufacturingandremanufacturingsystemwherebrand-newproductsareproducedinthemanufacturingplantandrecycledproductsareremanufacturedintoas-newproductsintheremanufacturingfacility.Boththebrand-newproductsandremanufacturedproductsareusedtosatisfycustomerdemands.Returnsofusedproductsthatarerecycledfromcustomersareassumedtobestochasticandnonlinearlyprice-dependent.Amathematicalmodelisproposedtomaximizetheoverallprofitofthesystemthroughsimultaneouslyoptimizingtheproductionandrecyclingdecisions,subjecttotwocapacityconstraints?themanufacturingcapacityandtheremanufacturingcapacity.BasedonLagrangianrelaxationmethod,subgradientalgorithmandheuristicalgorithm,asolutionapproachisdevelopedtosolvetheproblem.Arepresentativeexampleispresentedtoillustratethesystem,andmanagerialanalysisindicatesthattheuncertaintiesindemandandreturnhavemuchinfluenceontheproductionandrecyclingpolicy.Inaddition,twentyrandomlyproducedexamplesaresolved,andcomputationalresultsshowthatthesolutionapproachcanobtainverygoodsolutionsforallexamplesinreasonabletime.

  • 标签: 协调生产 随机和 回收 求和 再制造系统 拉格朗日松弛法
  • 简介:Theservicelifeofrefractoriesinladlewallsislimitedbycorrosion,abrasion,thermalshockandstructuralspallingmechanisms.Whentheladleislinedwithbrickstheytypicallyneedtobecompletelyremovedafteracertainnumberofheatstobereplacedbynewbricksofthesamesizeastheoriginalbricks.Notsoformonolithicladlelinings.Attheendoftheirservicelifetheremainsofthecastablecanalmostcompletelyberecycledastheycaninfactstayinplace.Onlytheworn-outpartofthelininghastobereplacedbyanewcastable.20%-50%oftheinitialladleliningcanberecycled"insitu".Theinstallationcanefficientlybedonebyshotcretingtechnics.Butitrequiresacastablethatresistsslagpenetrationverywell.Castablesbasedonacalciummagnesiumaluminatebondprovidetherequiredpenetrationresistance.Pumpingandshotcretingisverywelladaptedforrepairsofblastfurnaceshafts,torpedocars,hotmetalandsteelladlelinings[1].However,verylittleispublishedabouthowagoodpumpingandshotcretingperformancecanbeachievedwhentheinstallationhastobedoneunderextremeweatherconditions.Athighambienttemperaturethechallengeistoensureagoodpumpingresultwithoutearlycastablestiffening.Blockageofthepumpwouldbetheconsequence.Atlowambienttemperaturethedifficultyistode-activatethehighlyefficientdeflocculantfastenoughwithagellingagentaddedintothewetmixatthenozzletopreventthegunnedmaterialslippingoffthewall.Thispaperstudiesstrategieshowtoachievegoodinstalledpropertiesevenatextremeambienttemperatures.Theinteractionsbetweendeflocculants,retarders,gellingagents,andcalciummagnesiumaluminatebinderasafunctionoftemperaturearestudiedforanalumina-spinelladlecastable.Besideanewgellingagentforthiscastabletypealsoaspecialstabilizertoreducethetemperaturesensitivityhasbeeninvestigated.Itwillbehighlightedhowtheuseofthenewcalciummagnesiumaluminatebinderinlad

  • 标签: 钢包衬 单片 钢包浇注料 低环境温度 喷射混凝土 混凝土性能
  • 简介:Thetemperatureis56.5°Cwhenacetonegasisrectifiedduringtheproductionofpowderyphospholipid.Ifheatexchangerisadded,heatenergythatisreclaimedcanbeusedbyotherheaters.Onthebasisofexchangehotwater(51°C)4m3everyminute,afactorywiththeproductivityofpowderyphospholipidbeing10tonadaycansave533.2tonstandardcoalwhichisequivalentto746.48toncommoncoal.Ifthistechniqueofsavingenergyandreducingemissioncouldbewidelyusedincorrelativeindustriesofalloverthecountry,economicbenefitswillbeprominent.

  • 标签: 热能回收 生产厂 磷脂 粉状 再利用 废气排放
  • 简介:TheEuropeanstainlesssteelproducersgenerate20-30kgdustpertonofproducedstainlesssteel.ThedustformedduringvariousstagesoftheproductionprocesscontainsvaluablemetalssuchasCr,NiandMo.Ingeneralthisdustisconsideredasahazardouswaste.Ifnottakencareofthedustwillbeanenvironmentalriskcausingpotentialproblemssuchasleachingofheavymetalsintogroundwaterandpollutionoflandandair.Byapplyingtechniquesforrecyclingthedusttheproblemisminimizedandvaluablemetalsarerecoveredandre-usedasrawmaterialinthesteelmakingprocess,leadingtoasignificantreductionoftheconsumptionofnaturalresourcestodeceleratetheclimatechangeandensureasustainabledevelopment.OneofthebusinesssegmentsofBefesaZincS.L.U.,asubsidiarycompanyofAbengoa,istherecyclingofdustsandotherresiduescontainingnickel,chromiumandmolybdenumfromthestainlesssteelindustry.Thetechnologiesappliedaresubmergedarcreductionsmelting(BefesaValeraS.A.S.,Gravelines,France)andplasmareductionsmelting(BefesaScanDustAB,Landskrona,Sweden).Stainlesssteelplantdusts,millscaleandotherresiduesaredeliveredinclosedcontainersandbigbagsbyship,railortruckandstored.Afterapreparationoftheresiduesandchargingintothepyrometallurgicalfurnace,themetalcompoundscontainedinthechargearereducedtometalsinthepresenceofthecarbonadded.AtBefesaScanDust,theregularlytappedliquidmetaliscastintheformofgranulesviatheGranshot?granulationprocess.Thegranulatedproducthasmanyadvantagessuchasexcellentpreheatingpropertiesandfastmeltingwhenaddedtoametallurgicalprocess.Thegranulessizeandshapealsomakesitverysuitabletohandlewithmostrawmaterialhandlingsystems.Bygranulatingtheso-calledalloyedpigiron(API)ahighmetallicyieldisachievedensuringmaximumrecoveryofmetalandlessnewdustgenerationcomparedtoacrushedmaterial.Thegranulesareredeliveredtothestainlesss

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  • 简介:这篇文章讨论物理原则在在设计最小化熵率的运作的控制算法下面跑的一个热力学的工程太阳系被考虑。建议植物基于热力学和古典地建立的科学基础从遥远的来源处理化学元素并且与生热的俘获的技术的性质的理论,和实验学科。计量器原则在在熵率的控制背景的一个必要工具包含了的理论形式化被使用。介绍的工业系统被计划在一条稳固的浪费管理政策的范围以内再循环压缩物质。

  • 标签: 物质控制 循环压缩 计量器 熵率 太阳能 控制算法
  • 简介:Afacileandefficient1,4-conjungateaddition(Michaeladdition)reactionofactivemethylenecompoundstoα,β-unsaturatedcompounds,catalyzedbyguanidiniumlactateionicliquid(IL9),hasbeendeveloped.Arangeofchalconesandnitroalkenestogetherwithactivemethylenecompoundshavebeenconvertedsmoothlytothecorrespondingproductsinhighyields.

  • 标签: 迈克尔加成反应 离子液体 催化剂 乳酸 活性亚甲基化合物 MICHAEL加成
  • 简介:Theinnovationoftechnologyandtheimprovementofpeople'slivingstandardacceleratethereplacementofconsumerelectronicappliances,resultinginasignificantincreaseofwastehouseholdelectronicappliances(WHEA).ToaddresstheenvironmentalproblemsofWHEA,manycountrieshaveenactedlegislationaccordingtoWHEAmanagement,includingcollecting,processingandrecycling.TheregulationsonthemanagementofWHEAwerealsodraftedinChinaandpilotprogramsofWHEArecyclingmanagementencountereddifficultiesincollectingWHEA.Thesuccessofarecyclingschemeisdependentonpeople'swillingnessofparticipatinginthescheme.ThispaperappliesAjzen'stheoryofplannedbehaviortoseekthemainfactorstoengourageconsumerstoparticipateinWHEArecyclingmanagementinChina.Datafromasurveyconductedwithasampleof633consumersshowthatservicemotivationisthefirstpredictorofparticipationbehaviorintention,followedbyenvironmentalbehaviorattitude,economicmotivation,subjectivenorm,andperceivedbehaviorbarrier.Environmentalknowledgeisfoundnottobethepredictorofbehaviorintentioninthisrecyclingscheme.StudyresultsalsosuggestthatpublicityisthekeysituationalfactorintheWHEArecyclingmanagement.Recyclingnetworkandpolicyhavelittleinfluenceonchangingconsumers'currentbehaviorintentionandparticipation.Implicationsofthefindingsarediscussedandfutureresearchdirectionsaresuggestedintheend.

  • 标签: 行为理论 废物回收 消费者 家用电器 回收管理 设备更换
  • 简介:FordeterminingtheoptimalpercentageofRAPmaterialincentralplanthotrecycling,binderwasrecoveredfromRAPbymeansofAbsonrecoverymethod,andpropertiestestsofmixedbindersconsistingofrecoveredasphaltandfreshasphaltatdifferentratioswereperformed.Inaddition,theperformancesofmixturewithdifferentpercentagesofRAPsuchasruttingresistance,anti-cracking,moisturesusceptibilityandfatigueresistanceweretested.ThebindertestresultsshowedthatthehightemperatureperformancewasimprovedwiththeincreaseofthepercentageoftheRAP,whilethelowtemperatureperformancewasdeclined.Whenthepercentageoftherecoveredbinderwaslessthan30%,themixedbindercouldmatchthetechnicalstandardsforfreshasphalt.TestsonthemixturesshowedthatruttingresistanceincreasedgraduallyasRAPpercentageincreased,whilethermalanti-crackingatlowtemperatureandfatiguepropertiesdeclined.TheeffectofthepercentageofRAPonmoisturesusceptibilitywaslimited.ItisindicatedthatlowtemperatureperformanceandfatiguepropertiesareimportantforselectingtheoptimalpercentageofRAP.Basedondataobtainedfrombindersandmixtures,itisconcludedthatthemaximumpercentageofRAPisapproximately30%withouttheadditionofrejuvenatingagent.

  • 标签: 沥青路面再生 最佳比例 热再生 工厂 中央 混合料
  • 简介:Inordertoachievesustainableutilizationofnaturalresources,saveenergyandprotectenvironmentandecosystem,itisimportantforaregionoranationtodevelopandimplementaviablewasterecyclingmodelfromboththeoreticalandpracticalpointofview.Somepackagingrecyclingmodelsoperatedindevelopedcountriesareintroducedinthisarticle.Aluminiumcanrecoveryandrecyclingisemphasized.Costeffective,economicandenvironmentalbenefitofdifferentmodelsarecomparedandanalyzed.Theresultshowsthatallrecyclingmodelshavetheircharacteristicsduetotheinitialpurposeofrecoveryandthesituationoftheimplementingcountry.However,allthemodelscontributetothereductionofmunicipalsolidwastedisposalandresourcesconservation.

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  • 简介:Themechanismofhealtheffectscausedbyorganohalogenpollutants,e.g.,toxinsfromelectronicwaste(e-waste),ispoorlyunderstood.WesupposedthatmicroRNAs(miRNAs),animportantpost-transcriptionalregulator,couldplayaroleinthisprocess.Inthisstudy,fastingperipheralbloodsampleswerecollectedfromresidentslivingatane-wastesiteinnorthernChinaandanearbyreferencepopulation.Concentrationsofe-wasterelatedorganohalogenpollutantsinplasmafromtheexposuregroupwerehigherthanthecorrespondingmeasurementinthereferencegroup.Correspondingly,sixtymiRNAsinplasmashowed>2-foldchangebetweenthetwogroupsinmicroarrayanalysis.Amongthem,miR-125a-5pwasconfirmedtobeupregulatedbyqRT-PCRanditsvalidatedtargetswereenrichedinresponsestoxenobioticsandcancerrelatedpathways.Furthermore,significantpositivecorrelationswerefoundbetweenlevelsofmiR-125a-5pinplasmaandreactiveoxygenspecies(ROS)inpolymorphonuclearneutrophilleukocytes(P<0.05).Theseevidencessuggestedoxidativestressmightbeanintermediatebetweene-wasterelatedPOPsexposureandalterationofplasmamiRNA.

  • 标签: E-WASTE originated POLLUTANTS micro RNA mi
  • 简介:氧化铝在层次地多孔的氧化锆固体酸做和硫酸化经由一个壶和bi-surfactant-assisted同时被完成了自己组装过程,把铝硫酸盐用作艾尔和SO42吗?来源。没有氧化铝没有层次地多孔的结构,做和做Al的sulfated氧化锆,准备的合成的稳固的酸与sulfated氧化锆相比为酯化作用反应显示出许多提高的酸味和再循环的催化活动。

  • 标签: 氧化铝掺杂 多孔氧化锆 一锅合成 硫酸铝 固体酸 循环利用