Designation:C454−10(Reapproved2017)StandardTestMethodforDisintegrationofCarbonRefractoriesbyAlkali1ThisstandardisissuedunderthefixeddesignationC454;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthebehaviorofcarbonrefrac-torieswhensubjectedtotheactionofanalkaliatanelevatedtemperature.Thisdestructiveconditionasencounteredinserviceisacceleratedinthetesttoshowinashorttimetheprobablebehaviorofthecarbonrefractoryduringuse.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.SignificanceandUse2.1Thedisintegrationofcarbonrefractoriesbyalkaliattackatelevatedtemperaturesisanimportantconsiderationinusingthesematerialsforcertainapplications.Disruptionofcarbonrefractoriesinthetestissensitivetoanumberofvariables,includingalkaliconcentration,temperature,andthepresenceofwatervapor.Theprocedureissuitableforguidanceinproductdevelopmentandforrelativecomparisonsinapplica-tionworksuchasinblastfurnaceservice.3.ApparatusandMaterials3.1Sagger—Asagger,andcokebreezepassingaNo.4(4.75-mm)sieve.3.2Kiln—Thekilnshallbecapableofmaintainingthespecifiedrateofheating.Duringthetemperatureholdingperiod,thetempera...
