ASTM D6558-2000a(2005) 测定碳阳极和阴极块的TGACO2反应性的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminationofTGACO2ReactivityofBakedCarbonAnodesandCathodeBlocks
【原文标准名称】:测定碳阳极和阴极块的TGACO2反应性的标准试验方法
【标准号】:ASTMD6558-2000a(2005)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D02.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:anode;cathodeblock;CO2reactivity;dusting
【摘要】:TheCO2reactivityratesareusedtoquantifythetendencyofacarbonartifacttoreactwithcarbondioxide.Carbonconsumedbytheseunwantedsidereactionsisunavailablefortheprimaryreactionsofreducingaluminatotheprimarymetal.CO2dustingratesareusedtoquantifythetendencyofthecokeaggregateorbindercokeofacarbonartifacttoselectivelyreactwiththesegases.Preferentialattackofthebindercokeorcokeaggregateofacarbonartifactbythesegasescausessomecarbontofalloffordust,makingthecarbonunavailablefortheprimaryreactionofreducingaluminaand,moreimportantly,reducingtheefficiencyofthealuminumreductioncell.ComparisonofCO2reactivityanddustingratesisusefulinselectingrawmaterialsforthemanufactureofcommercialanodesforspecificsmeltingtechnologiesinthealuminumreductionindustry.CO2reactivityratesareusedforevaluatingeffectivenessandbeneficiationprocessesorforresearchpurposes.1.1Thistestmethodcoversthethermogravimetric(TGA)determinationofCO2reactivityanddustingofshapedcarbonanodesandcathodeblocksusedinthealuminumreductionindustry.Theapparatusselectioncoversasignificantvarietyoftypeswithvariousthermalconditions,samplesizecapability,materialsofconstruction,andproceduresfordeterminingthemasslossandsubsequentrateofreaction.Thistestmethodstandardizesthevariablesofsampledimensions,reactiontemperature,gasvelocityovertheexposedsurfaces,andreactiontimesuchthatresultsobtainedondifferentapparatusesarecorrelatable.1.2solely-SI-units;1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:77_020
【页数】:5P.;A4
【正文语种】: