简介：

简介：Theapplicationresultsofsemi-rebondedmagnesite-chromebricksatRHlowevesselofNKKCorporationKeihinWorkshavebeenanalysed,Theresultsindicatethatthemainreasonsthatcausethedamageoftherefactorybrcksinclude:chemicalattackofslagetothesemi-rebondedmagnesite-chromebricks;pene-trationofmoltenstel,slagintothebricks;andthermaspallingduetotemperaturefluctua-tionduringsteelmakingoperation.Theresultsofmultipleeffectionofthesefactorsleadtoalternativeactionoferosion(chemicalattackandpenetration)andspalling(thermalspallingandstructurepeeling)resultinginthedamageofthebrik,Inordertoimprovetheperformanceofthebricks,itisnecessarytopromotetheresistancetoerosionandthermalshockresistanceaswellastokeeptheaccuratedimensionsofthebrick,Themeasuresofimprovementofresistancetoerosionofmagne-site-chromebrickstakenbytheresearchesmainlyinclude:loweringthecontentsofimpu-ritiesinthebricks(mainlyincludingSiO2,CaO,andnextFe2O3andAl2O3);promotingtheextentofdirectbondofthebrick;formingalargeamountofmagnesia-chromecompositespinelwell-distributedinthebricksthroughaddingalargeamountofsynthesizedmateri-als;enhancingtheresistancetoerosionbyaddingalittleamountofhigh-effectiveadditives,Improvementofthermalshockresistanceofthebricksismainlythroughintroducingsomeadditivetomakeacertainamountofmi-cro-cracksoccurinthebricksoastoobtainaneffectofincreasingtoughnesorthroughfor-mationofsecondhightemperaturesolidphaseinthebrickbyadoptingadditive,Inaddition,itisneededtoimprovethequalityofthebrickappearanceandensureaccuratedimensionsofthebrick,Thepurposeofthispaperistofurtheriprovetheservicelifeoftherefractorybricksbymakinguseoftheimprovementmea-surestakenonthebasisoftheanalysisresultsoftheusedbricks.

简介：TheapplicationresultsofSemi-rebondedMagnesite-ChromebricksatRHlowervessloftheNKKCorporationKeihinWorkshavebeenanalysed.Theresultsindicatethatthemainreasonsthatcausethedamageoftherefractorybricksincludechemicalat-tackofslagtotheSemi-rebondedMagnesite-Chromebricks;penetrationofmoltensteelandslagnintothebricks;andthermalspallingduetoteperaturefluctuationduringsteelmakingoperation.There-sulitsofmultipleeffectionofthesefactorsleadtoalternativeactionoferosion(chemiclattackandpenetration)andspalling(thermalspallingandstructurepeeling)resultinginthedamageofthebrick,Inordertoimprovetheperformanceofthebricks,itisnecessarytopromotetheresistancetoero-sionandthermalshockresistanceaswellastokeeptheauratedimensionsofthebrick.Themeasurestoimprovetheresistancetoerosionofmagnesite-chromebrickstakenbytheresearchersmainlyin-clude:loweringthecontentsofimpuritiesinthebricks(mainlyincludingSiO2,CaO,andnextFe2O3andAl2O3);promotingtheextentofdirectbondofthebrick;formingalargeamountofmagnesia-chromecompositespinelwell-distributedinthebricksthroughaddingalargeamountofsynthe-sizedmaterials;enhancingtheresistancetoerosionbyaddingalittleamountofhigh-effectiveaddi-tives,Improvementofthermalshockresistanceofthebricksismainlythroughintroducingsomeaddi-tivetomakeacertainamountofmicro-cracksoccur-inginthebricksoastoobtaintheeffectofincreasetoughnessorthroughformationofsecondhightem-perturesolidphseinthebrickbyadoptingaddi-tive,Inddition,itisneededtoimprovethequalityofthebrickappearanceandensureaccuratedimen-sionsofthebrick,Thepurposeofthispaperistodescribethefurtherimprovementoftheservicelifeofrefactorybrickbythemeasurestakenonthebasisofthenalysisresultstotheusedbricks.

简介：BasedontheanalysesoftheliningtechnologiesofthehotpressformedcarbonbrickiuU.S.A.,ofthece-ramiccupinFranceandofthecreativeself-bakingcar-bonbrickinChina,thetechnologyofsemi-graphitizedcar-bonblock-ceramicbrickworkhasbeenstudiedanddeveloped,andhassuccessfullybenusedinNo.7blastfurnace(2580m^3)atAnshanIromandSteelCompanyandinNo.3blastfurnace(1200m^3)atTaiyuanIronandSteelCompany,Thispaperputsfourwardafeasibleschemeforrealizationoflongservicelivesofthebootmsandthehearthsoflarge-sizedblastfuracesinChina.