简介：The10thCoalGeologyConference,jointlyorganizedbytheFacultyofScienceoftheCharlesUniversityinPrague,theCzechGeologicalSurveyandtheInstituteofGeologyoftheAcademyofSciencesoftheCzechRepublic,tookplaceinJune7-11,2004,attheFacultyofScience.Thecoalgeologyconferenceshavebeenheldatthefacultyeverythreeorfouryearssince1972.Theywereprecededbycoalgeologyseminarswhichbeganevenearlier,inJanuary1968.Theseseminarsandconferencesprovidedanexcellentopportunitytoexchangeknowledgeandnewinformationoncoalgeologyandrelatedfieldsand,aboveall,tobringtogetherpeoplefromvariousfieldsstartingwithscienceandendingupwithawidespectrumofinterests.

简介：ThisstudymainlyintroducesthetechnicalpropertiesofakindofleancoalminedfromLu'an,aprefectureofShanxiProvinceanditsapplicationtocoalinjectioninlarge-scaleblastfurnaces(BFs)inBaosteel.Chinaisrichinleancoalresources.Thetechnicalpropertiesofleancoal,includingashcontent,sulfurcontentandcaloricity,etc.,aresimilartothoseofanthracitecoalusedinBaosteel,exceptthefactthatthevolatileofleancoalishigher.Besides,theexplosivepropertyandthecokingpropertyofleancoalaresuitablefortheBFcoalinjection.Inthisstudy,leancoalwastestedinthepulverizedcoalinjection(PCI)ofaBF.Inthetest,theblendingproportionofleancoalinthecoalblendwasincreasedgradually,andtheconsequentialproductionindexesweretraced.AlltheoperationalindexesshowthattheresultsoftheBFcoalinjectionaregood,demonstratingthatleancoalcanbesubstitutedforanthracitecoalinthePCIinBFs.Withanabundantamountandspecificutilization,leancoalisfoundtobeofahigheconomicvalue.

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简介：HuainanCoalMiningBureau,aspeciallargecoalenterpriseandastatekeycoalproductionbase,issituatedincentral-northpartofAnhuiProvince.Thearea,well-knownas"thecoalcapitalofEastChina",aboundsincoalresources,andtheprovencoalreserveisestimatedtobeupto70billiontonswithcompletevarietiesandsuperiorquality.Bytheyearof2010,theannualproductioncapacitywillreach30milliontons.Thereareexcellentinvestmentenvironmentandconvenientcommunicationandtransportation

简介：Outburstsofcoalandgasarecloselyrelatedtocoalmicrostructures.Partofmicrostructuresofcoalareassociatedwiththecoal-formingenvironments,butmostofthemareproducedbytectonicdeformation.Inthispaperthetypesofmicrostructuresofcoalaredistinguishedaccordingtothetypesandfeaturesoftectonicdeformations,whichisconvenientandcanbeeasilyemployedbygeologists.BasedontheSEMstudyoncoalpetrographyofNo.4andNo.6coalseamsoftheYutianbaocoalmine,Nantongcoalfield,fivetypesofcoalaredistinguished:nontectoniccoal,microfissurecoal,microcleavagecoal,cataclasticcoalandmyloniticcoal.Themicrostructuralfeaturesofvarioustypesaredescribedindetailandtheirgeologicalimplicationsandrela-tionshipswithcoalandgasoutburstsarealsodiscussed.Specialmentionismadeofaseriesofthefeaturesofplasticdeformationofmyloniticcoal.Itisconcludedthat,otherthingsbeingequal,theplacewithmyloniticcoalisthemostlikelyrisksiteforoutbusts.Theprocessandmechanismofcoalandgasoutburstsaresuggestedbasedonaseriesofchangesinmicrostructuresofthecoalafterbursting.Intheprocessofgasoutbursts,theplasticdeformationissuperimposedbybrittledeformation,thusejectinglargequantitiesofcoaldust.

简介：The500kt/acoal-basedmethanolunitwasputonstreamatYanzhouCoalMineAdministrationinShandong.Theinvestmentinthisprojecttotals2.217billionRMB.ThisprojectadoptstheAmericantechnologytogasifythewa-

简介：Thelong-termdumpingofcoalwastepileshascausedseriousenvironmentalproblems.Releaseoftraceelements(includingrareearthelements,REEs)fromcoalspoilsgobswasinvestigatedatYangquancoalmine,ShanxiProvince,China.X-raydiffraction(XRD)wasusedtoanalyzethemineralcompositionofthecoalspoils.Themineralsofthecoal-spoilsamplesaremainlykaoliniteandquartz,withaminorproportionofpyrite.Thebatchandcolumntestswereemployedtosimulatetheleachingbehavioroftraceelementsfromcoalspoils.ElementsV,Cr,Zn,As,Pb,andCdarehighlyenrichedinallcoalspoils.ThecoalspoilsalsohaveelevatedlevelsofGa,Ge,Se,Sn,Hf,andTh.Theleachateofcoalspoils,friedcoalspoilsandCSFGM(coalspoilsfiregasmineral)samplesareacidic,withthepHvaluesrangingbetween3.0and6.6.Thereleasedelementswithhighconcentrations(over100μg/L)includeFe,Mn,Co,NiandZn,whilemoderately-releasedelementsareCu,Se,MoandAs.Ahighcontentofheavymetalsinbatch-testleachatewithCSFGMindicatesanincreasedmobilityofheavymetalsincoalspoilcombustionbyproduct.Withinthefirsthourwashingwiththeelectrolytesolution,arapidriseofcommoncations,traceelements,andREEscontent,aswellasadropofpHvalue,ineffluentwasobserved.Anincreasedleachingvelocityfavorsthereleaseoftraceelementsfromcoalspoils.Inaddition,thepulseinputofprecipitationledtomoreelementstobereleasedthancontinuousleaching.

简介：Thedeterminedresultsofthesulfurcontentsandisotopiccompositionofcoalsamplesfrommajorcoalminesin15provincesandregionsofChinashowthatthecoalminedinthenorthofChinaischaracterizedbyhigher^34Sandlowersulfurcontent,butthatinthesouthofChinahaslower^34Sandhighersulfurcontent.Duringthecoal-burningprocessinbothindrstrialanddailyuseofcoalasfuelthereleasedsulfurdioxideisalwaysenrichedinlightersulfurisotoperelativetothecorrespondingcoal;theparticlesarealwaysenrichedinheaviersulfurisotope.Thediscussionontheenvironmentalgeochemicalsignificanceoftheabove-mentionedresultsalsohasbeenmade.

简介：TheCOREXprocessisauniqueindustrializedsmeltingreductiontechnologyforiron-makingpresentlyintheworld.Oneofitsstrikingcharacteristicsisitsabilitytodirectlyutilizelumpcoalasitsmainfuel.Therefore,theCOREXprocessuseslittle,ornocokeatall.TherequirementsonlumpcoalfortheCOREXprocessweregiveninthispaper.Inordertoreducethecokeconsumptionandgiveplaytotheadvantagesofdirectlyusinglumpcoal,theappropriateratioofcoketolumpcoalneedstobedetermined.Thispaperalsosummerizedseveraladvancedmethodsofusingpowderedcoalgeneratedbythetransporting,loadingandunloadingoflumpcoal.InordertosolvethelackofcoaltypesforCOREXandobservethecrackinganddevolatilizationactionoflumpcoalinthemelter-gasifier,anexperimentaldeviceandanewmethodwereproposedtotestthecrackinganddevolatilizationcharacteristicsoflumpcoal.Bymeansofthenewmethod,thedevolatilizationandcrackingbehaviorsoflumpcoalcanbeinvestigated,whichishelpfultotheselectionoflumpcoalfortheCOREXprocess.

简介：Inductivelycoupledplasmamassspectrometry,inductivelycoupledplasmaopticalemissionspectroscopy,hydridegeneration-atomicfluorescencespectrometry,emissionspectrometry,Xfluorescencespectrometry,andX-raydiffractionwereemployedtostudythegeochemistryandmineralogyofcoalganguesfromNos.2,3,and8coalseamsoftheDu’erpingcoalmine,Xishancoalfield,Taiyuan,ShanxiProvince.Thestudyrevealedthatcomparedwiththesedimentarycover,uppercontinentcrust,Carboniferous-PermiancoalfromNorthChina,aswellasmostcoalinChina,coalganguesfromNos.2and3coalseamsarerichinLi,Be,Sc,Cr,Cu,Ga,Ba,Th,Nb,Cd,Pb,Taandrare-earthelements,andcoalganguesfromNo.8coalseamarerichinLi,Sc,V,Cr,Ga,U,andrare-earthelements.ComparedwiththeCarboniferous-PermiancoalfromNorthChinaandmostcoalinChina,coalganguesfromNos.2,3and8seamsarerichinRb,V,CsandSr.Therefore,TheDu’erpingcoalganguesintheXishancoalfieldarerichinmosthazardoustraceelementsandrare-earthelements,whereinthecontentsofGaandLireachtheindustrialgradeandhavesignificanceforindustrialutilization.Onthewhole,coalganguesoftheShanxiFormationfromthePermianarerichinmoretraceelementsthanthoseoftheCarboniferousTaiyuanFormation.ThedistributionsofREEshowobviouslydippingrightwardswithnegativeEuanomalies.Thecontentsofrare-earthelementsinthethreeseamsarequitedifferent.Alloftheaboveindicatethatthesourceoftherare-earthelementsisterrigenousdebris.MineralsinNo.2seamidentifiedbyX-raydiffractionmainlyincludequartz,kaolinite,inadditiontocalcite,pyrite,apatite,epidote,andepsomite.No.3seammainlycontainsquartz,kaolinite,inadditiontoasmallamountofsodiumfeldspar,calciumnitrate,ironore,gypsum,andvivianite.No.8seammainlycontainskaolinite,dickite,quartz,illite,andasmallamountofhematiteandU.Thecorrelationsbetweenmajorelementsandtraceel

简介：Athree-dimensionalmathematicalmodelofthecombustionofpulverizedcoalandcokehasbeendeveloped.Themodelisappliedtotheblowpipe-tuyere-raceway-cokebedregioninanironmakingblastfurnaceinonecomputationaldomain,whichincludestwoparts:pulverizedcoalcombustionmodelintheblowpipe-tuyere-racewaycavityandthecoal/cokecombustionmodelinthesurroundingcokebed.Theeffectsofcoalpropertiesareexaminedcomprehensively,intermsofcoalburnoutandgasspeciesdistributions.TheresultsindicatethatusingacoaloffineparticlesizeorhighVMcontentcouldimproveburnoutandwouldaffectthegascompositionconsiderably.Theburnoutisexaminedintwoways:comparedwithburnoutalongtuyereaxis,burnoutovertheracewaysurfaceisamoresensitiveandsensibleparametertodescribetheamountofunburntcharenteringthecokebed.Themodelisusefulforexaminingtheflow-thermo-chemicalcharacteristicsofthepulverizedcoalinjection(PCI)processundervariousconditionsinablastfurnace.

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简介：摘要：煤缝接和充满煤的地区的形成是在煤累积过程的一系列因素的综合结果。煤累积系统是煤累积因素的建筑上的聚集。它能被分类进4个层次：全球煤累积超级系统，煤累积领域大系统，煤累积盆系统，和煤缝接或煤缝接设定分系统。煤累积进程是一个开、动态、灰的系统，并且是同时有象聚集的如此的性质的一个系统，关联，全部，面向目的，层次，和环境适应性。在这份报纸，我们作为一个系统拿煤累积过程学习煤缝接和充满煤的地区的起源；并且我们将讨论煤累积过程的系统的分析的方法论。作为一个例子，Ordos煤盆被调查阐明煤累积系统分析的方法的应用程序。

简介：BytheendofApril2008the500kt/aCTM(coal-to-methanol)unithadstablycrankedoutmethanolatLongyuCoalChemicalCompanyunderYongchengCoalPowerGroup.Analysisofproducthadrevealedthatthequalityof

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简介：Atthebeginningof2008,theCentral,EastandSouthChinasufferedararesnowandicedisaster.Afterthedisaster,powergenerationandpowergridenterprisesfacedabigproblemofpowercoalsupply.

简介：Since1978,China’scoalindustryhaswitnessedrapidandhealthydevelopment.AsChinaisundergoingastructuraltransitiontoasocialistmarketeconomy,China’scoalindustrywillimplementamoreopenpolicy,createanidealinvestmentenvironmentandabroadinvestmentfieldforforeigninvestors,conductinternationaltechnicalexchangeandeconomiccooperationonthebasisofequalityandmutualbenefit,andpromotethetechnicalprogressandeconomicgrowthofChina’scoalindustry.

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简介：Inthepresentpaper,amultifluidmodeloftwo-phaseflowswithpulverized-coalcombustion,basedonacontinuum-trajectorymodelwithreactingparticlephase,isdevelopedandemployedtosimulatethe3-Dturbulenttwo-phaseflowsandcombustioninanewtypeofpulverized-coalcombustorwithoneprimary-airjetplacedalongthewallofthecombustor.Theresultsshowthat:(1)thiscontinuum-trajectorymodelwithreactingparticlephasecanbeusedinpracticalengineeringtoqualitativelypredicttheflamestability,concentrationsofgasspecies,possibilitiesofslagformationandsootdeposition,etc.;(2)largerecirculationzonescanbecreatedinthecombustor,whichisfavorabletotheignitionandflamestabilization.

简介：BauxitefromQingzheniscalcinedforrefractoriesapplications.Threefuelsourceswithdifferentamountsofresidualashandferricoxidewereusedforbauxitecalcinationinarotarykiln.Itisfoundthequality,includingthecontentofferricoxide,bulkdensity,apparentporosityandwaterabsorption,ofthebauxiteishighlyinfluencedbythefuelsourceofrotarykiln.Inessence,theeffectoffuelonthequalityofbauxiteisattributedtotheamountofferricoxideintroducedbythefuel.Introductionofamodestquantityofferricoxideisbeneficialforpromotingthedensificationofbauxite.