简介:TheformingtemperatureofClinkermeltunderdifferentburningconditionshasbeenstudiedbyappearanceexaminationandthermalshrinkerdetermination,andtheviscosityofmelthasbeendiscussedbystudyingthecoordinationnumberofAl3+andFe3+incementclinkerburnedbydifferentmethodwithx-rayfluorescenceanalysisandMoss-bauerspectroscopy.Theresultsshowthattheclin-kermeltunderrapidburningmaycomeintoexis-tenceatlowertemperatureandIt’sviscosityislower.Sotheformingprocessesofclinkermaybedifferentatrapidburningfromordinaryburning.Theyareprobablyanimportantfactortopromotetheformationofclinkerburnedatlowertemperaturewithrapidburningmethod.
简介:Basedonpremixedflame,thetheoreticalmodeloftransportpropertieswithtemperaturevariationwasestablishedinsideapreheatedzone.Lewisnumberofthedeficient-to-stoichiometrichydrocarbon/airmixturehasbeentheoreticallypredictedoverawiderangeofpreheatedtemperature.Thesepredictionsarecomparedwiththeexperimentaldataontransportpropertiesthatexistinthelitexature.TheresponseoftheburningvelocitytoflamestretchcanbeparameterizedbythelaminarflamespeedandMarksteinlength.Therefore,ifthelaminarflamespeedandMarkateinnumbercouldbeaccuratelysimulatedbyusingananalyticexpressionofcharacterizedtemperature,equivalenceratio,andLewisnumber,theresultsareapplicabletothepredictionofmethane,acetylene,ethylene,ethane,andpropaneflames.Expandingpreviousstudiesontheextinctionofpremixedflamesundertheinfluenceofstretchandincompletereaction,theresultswerefurtherclassifiedandrescaled.Finally,itcouldbeinferredthatparameterpq,therescaledextinctionKarlovitznumbercouldbeusedtoexplainthedegreeofflamequench.
简介:Thedeterminedresultsofthesulfurcontentsandisotopiccompositionofcoalsamplesfrommajorcoalminesin15provincesandregionsofChinashowthatthecoalminedinthenorthofChinaischaracterizedbyhigher^34Sandlowersulfurcontent,butthatinthesouthofChinahaslower^34Sandhighersulfurcontent.Duringthecoal-burningprocessinbothindrstrialanddailyuseofcoalasfuelthereleasedsulfurdioxideisalwaysenrichedinlightersulfurisotoperelativetothecorrespondingcoal;theparticlesarealwaysenrichedinheaviersulfurisotope.Thediscussionontheenvironmentalgeochemicalsignificanceoftheabove-mentionedresultsalsohasbeenmade.