ASTM D440-2007 煤的跌落粉碎试验的标准试验方法

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【英文标准名称】:StandardTestMethodofDropShatterTestforCoal
【原文标准名称】:煤的跌落粉碎试验的标准试验方法
【标准号】:ASTMD440-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:煤;跌落试验;燃料;固体燃料;测试
【英文主题词】:breakage;coal;coalhandling;dropshatter;friability;sizestability
【摘要】:Thevaluesdeterminedinthistestmethod,whenevaluatedintermsofpertinentexperiencewithothercoals,maybeusedasindicationsoftheextenttowhichcoalwillbreakinconventionaltransitandhandlingbeyondthepointofsampling.1.1Thistestmethodofdropshattertestcoversthedeterminationoftherelativesizestabilityanditscomplement,thefriability,ofsizedcoal.Itaffordsameansofindicatingtheabilityofcoaltowithstandbreakagewhensubjectedtohandlingatthemineandduringtransittotheconsumer.Thetestmethodisserviceableforascertainingthesimilarityofcoalsinrespecttosizestabilityandfriabilityratherthanfordeterminingvalueswithinnarrowlimitsinordertoemphasizetheirdissimilarity.Thistestmethodisconsideredapplicablefortestingaselectedsinglesizeofdifferentcoals,fortestingdifferentsinglesizesofthesamecoal,andformixedsizesofthesameordifferentcoals.Note1Bysinglesizesismeantthosewithfixedupperandlowersieveopeninglimits,selectedfromthosedesignatedin;andbymixedsizesismeanteither"slack"oramixtureoftwoormoresinglesizes.1.2Thistestmethodappearsbestsuitedformeasuringtherelativeresistancetobreakageofthelargersizesofcoalwhenhandledinthinlayerssuchasfromloadertominecar,fromloadingboomtorailroadcar,fromshoveltochute,etc.Whileitmaynotbesowelladaptedformeasuringtheliabilitytobreakageofcoalwhenhandledinmass,asinunloadingopen-bottomcars,emptyingbins,etc.,itisbelievedthatthetestmethodwillservealsotoindicatetherelativesizestabilityofcompositesizesofcoalwhere,incommercialhandling,thesmallersizedpieceshaveacushioningeffectwhichtendstolessenthebreakageofthelargerpiecesofcoal.1.3Thevaluesstatedininch-poundunitsshallberegardedasthestandard.Massmaybeexpressedinmetricvalues.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:D21
【国际标准分类号】:73_040
【页数】:4P.;A4
【正文语种】: