【英文标准名称】:StandardTestMethodforPerformingtheSieveAnalysisofCoalandDesignatingCoalSize
【原文标准名称】:进行煤和特定煤粒度筛选分析的标准试验方法
【标准号】:ASTMD4749-1987(2007)
【标准状态】:现行
【国别】:
【发布日期】:1987
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D05.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:筛选(大小);燃料;质量;适用性;试验;煤;固体燃料
【英文主题词】:coalsize;sieve;sieveanalysis
【摘要】:Thistestmethodconcernsthesievingofcoalintodesignatedsizefractionsforthepurposeofcharacterizingthematerialastoitsparticlesizedistributionforfurtherprocessingorforcommercialpurposes.ThisiscoveredinPartAofthisstandard.Raw,aswellasprepared(crushed,cleaned,orscreened),coalscanbetestedbythistestmethod.Thistestmethodisapplicableforalltypesofcoals,exceptforpulverizedcoals(seeMethodD197)suchasfedintosteamboilers.Lowrankcoals,thatis,lignites,subbituminous,andhighvolatilebituminousC,mustbedriedwithcautionandhandledwithcaretominimizedeteriorationorsizedegradationduringsieving.Thistestmethodisapplicableforthewetordry-sievingofcoalatsizesfrom200mm(8in.)to38x03BC;m(No.400U.S.A.Standard).Methodsforsizingmaterialsbelow38x03BC;mareoutsidethescopeofthistestmethod.Note28212;Thesizingofmaterialthatpassesthe38x03BC;msieveisnormallyperformedbyopticalmicroscopy,sedimentation,centrifugation,lightscatteringorobfuscation,surfaceareameasurement,orothersuchmethods.Subsievetechniquesarealsousedsometimes.Thistestmethodalsoconcernsthedesignationofacoalsampleastoitsupper(nominaltop-size)andlower(nominalbottom-size)limitingsizesforthepurposeofcharacterizingthematerialforfurtherprocessingorforcommercialpurposes.ThisiscoveredinPartBofthistestmethod.Anthracitecoalisfurtherdesignatedbyaoneworddescriptiveterm(see14.4).Enoughmaterialmaynotbecollectedbythistestmethodtomeetsubsequenttestprocedures,suchaswashabilityanalyses(TestMethodD4371).PARTA.SIEVEANALYSISOFCOALTop1.1Thistestmethodcoversproceduresfordeterminingthesieveanalysisofcoalanddesignatingthesizeofcoalfromsieveanalysisdata.Rawaswellasprepared(crushed,cleanedorscreened)coalscanbetestedbythistestmethod.1.2Thistestmethodexplainshowtodesignatecoalsizesfromtheresultsofsieveanalysisdatainordertorepresenttheconditionofthecoalassold.Inthecaseofspecialmixturesorcoalswithnoncontinuousrangesofsizes,asufficientlycompletesieveanalysismustbemadetoproperlydescribethesizedistribution.1.3Thistestmethodisnotapplicablefordeterminingthesieveanalysisnorfordesignatingthesizeofpulverizedcoal.(See.)Sizefractionsdowntoandincluding38m(No.400U.S.A.StandardSeries)canbetreatedbythemethodsdiscussedinthistestmethod.Methodsforhandlingsizefractionsbelow38m(No.400)willbedevelopedbythiscommittee.Note1Forpowderedorpulverizedcoalasisfiredintosteamboilers,refertoTestMethodD197.1.4si-value;Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother,withoutcombiningvaluesinanyway.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:D27
【国际标准分类号】:19_120
【页数】:10P.;A4
【正文语种】: