2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Designation:D5159?04(Reapproved2014)StardGuidefDustingAttritionofGranularActivatedCarbon1ThisstardisissuedunderthefixeddesignationD5159thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseo

2、frevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thisguidepresentsaprocedurefevaluatingtheresistancetodus

3、tingattritionofgranularactivatedcarbons.FthepurposeofthisguidethedustattritioncoefficientDAisdefinedastheweight(calculatedvolume)ofdustperunittimecollectedonapreweighedfilterinagivenvibratingdeviceduringadesignatedtimepe

4、runitweightofcarbon.Theinitialdustcontentofthesamplemayalsobedetermined.Granularactivatedcarbonisdefinedasaminimumof90%beinglargerthan80mesh(0.18mm)(seeTestMethodsD2867).1.2ThevaluesstatedinSIunitsaretoberegardedasthesta

5、rd.Theinchpoundunitsgiveninparenthesesarefinfmationonly.1.3Thisguidedoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisguidetoestablishappropriatesafetyhealthpractice

6、sdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2D2854TestMethodfApparentDensityofActivatedCarbonD2867TestMethodsfMoistureinActivatedCarbonE11SpecificationfWovenWireTestSieveClo

7、thTestSievesE300PracticefSamplingIndustrialChemicals3.SummaryofGuide3.1Aknownvolumeofknownweightofthegranularactivatedcarbonisplacedinasampleholdervibratedatconstantacceleration(g)faknowntime.Thedustiscarriedbyanairstrea

8、mpassingthroughthevibratingsampleisthencollectedonapreweighedfilter.Thequantitiesofdustcollectedinsix10minintervalsaredeterminedbyweighingsonananalyticalbalance.4.SignificanceUse4.1Threefcescanmechanicallydegradeagranula

9、ractivatedcarbon:impactcrushingattrition.Ofthesethreeattritionabrasionisthemostcommoncauseofdustfmationinactualservice.Publishedtestprocedurestodeterminethe“hardness“ofactivatedcarbonsproduceresultsthatingeneralcannotbec

10、relatedwithfieldexperience.Fexampletheballpanhardnesstestappliesallthreefcestothesampleinavariablemannerdeterminedbythesizeshapedensityoftheparticles.The“stirringbar“abrasiontestmeasuresattritionsolongastheparticlesizeis

11、smallerthan12mesh.Thereissomeevidencehoweverthattheresultsofthistestmethodareinfluencedbyparticlegeometry.Theproceduresetfthinthisguidemeasurestheeffectoffrictionfcesbetweenvibratingslowlymovingparticlesduringthetestmayb

12、eonlyslightlydependentonparticlesizeshapedensityeffects.5.Apparatus5.1VibratingTable3capableofprovidinganRMS(rootmeansquare)accelerationof40mss(4g).5.2TestCellsuchasshowninFig.1preferablymadeofaluminumotherelectricallyco

13、nductivematerial.5.3PiezoelectricAccelerometer4capableofmeasuringanRMSaccelerationchosenbytheuser.Avalueof40mss(4g)issuitablewhenusingtheapparatusinFig.1Fig.2.5.4SignalConditioner5tointerfacetheaccelerometerwithanACmilli

14、voltmetercapableofproducingalinearoutputvoltagefrom0to1Vacproptionaltotheacceleration.1ThistestmethodisunderthejurisdictionofASTMCommitteeD28onActivatedCarbonisthedirectresponsibilityofSubcommitteeD28.04onGasPhaseEvaluat

15、ionTests.CurrenteditionapprovedJuly12014.PublishedSeptember2014.Lastpreviousversionapprovedin2009asD5159–04(2009).DOI:10.1520D515904R14.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnn

16、ualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3ABuffaloDentalManufacturingCo.(UnderhillBlvd.SyossetNY11791)vibratModelNo.1rated40Wat115V60HzaSyntronModelJ1Avibratingjoggerrated30W

17、at115V60Hzhavebeenfoundsuitablefthispurpose.4AnEndevcoaccelerometerModelNo.2251hasbeenfoundsuitablefthispurpose.5AnEndevcoModel4416signalconditionerbatteryoperatedhasbeenfoundsuitablefthispurpose.Copyright?ASTMInternatio

18、nal100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates15.5Voltmeter60to1Vac.5.6Ammeterac0to1000mAaccurateto1mA.5.7VariableTransfmer0to120V.5.8TimerControl0to120min.5.9RubberIsolationPada45durometerneoprener

19、ubberpadhasbeenfoundsatisfacty.5.10Flowmeterwithflowcontrolvalvecapableofcontrollingairflowattheflowratechosenbytheuserofthisguide.Aflowofabout7LminissuitablewhenusingtheapparatusofFig.1Fig.2.5.11ParticulateFiltersizedto

20、interfacewithtestcellcapableofcapturingcarbonfines.Severalcommercialglassfiberfiltershavebeenfoundsatisfacty.Alsoeffectivearetheparticulatefilterssoldfrespiratyprotectionagainstpaintsprayotherparticulatehazards.5.12Gradu

21、atedCylinder100mLcapacity.5.13AnalyticalBalancecapableofweighingto0.1mg.6.SamplingTestSpecimensTestUnits6.1GuidanceinsamplinggranularactivatedcarbonisgiveninPracticeE300(seealso8.1).7.PreparationofApparatus7.1Assembleate

22、stcellsimilartothatshowninFig.1Fig.2.7.2Mounttheaccelerometeratthecenterofthecoverplate.7.3Placethevibrattestassemblyonthevibrationisolationpadsothatthecoverplateofthetestcellislevel.7.4Connecttheaccelerometerleadtothesi

23、gnalconditionerthenconnecttheoutputofthesignalconditionertothemicrovoltmeter(seeFig.3).7.5Connecttheaccelerometerleadtothesignalconditionerthenconnecttheoutputofthesignalconditionertothemicrovoltmeter(seeFig.3).7.6Connec

24、tthevibrattothevariabletransfmerconnectthetransfmertoatimercontrolwiththemilliammeterinseries(seeFig.3).6AKeithley179digitalmultimeteravailablefromKeithleyInstrumentsAuraRd.ClevelOH44139hasbeenfoundsuitablefthispurpose.N

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