简介:ReviewonthedevelopmentofrefractoriestechnologyinChina'sironandsteelindustryduringtheperiodof"theninthfive-yearplan"hasbeenmade.Somesugges-tionsandopinionsonthefuturedevelopmentofrefractoriesscienceandtechnologyinChinahasbeenputforward,includingfullutilizationofdomesticrichresourcesofrefrac-toryrawmaterialstodevelopsophisticatedsyntheticrefrac-toryrawmaterialswithChinesecharacteristicsandtheR&Donhigh-techrefractoryproductsformeetingtherequire-mentofthedevelopmentofnewmetallurgicaltechnology.
简介:Thedevelopmentandapplicationofhighqualityrefractoriesforself-heatingcopper-smeltingfurnae(SHCSF),whichadoptsthemostadvancedcopper-smeltingprocessintheworld,hasbeenintroducedinthispaper.Theservicelifeofthefurnacehasbeenincreasedfromoneandahalfmonthstoaround20monthsbyusinghighqualityrefractioriesandimprovingthemasonmethod.
简介:Thispaperdescribesdevelopmentsofhighqualitymagnesite-chromebricksusedforsecondarysteelmakingfurnaces,mainlyincludingdirect-bond-edmagnesite-chromebrick,fullysynthesized(co-clinker)magnesite-chromebrick,semi-rebondedmagnesite-chromebrickandfusedgrainrebondedmagnesite-chroebrick,Investigationshavealsobeenconductedontheeffectsofvariouschromitesonthepropertiesofthedirectbondedmagnesite-chromebrick,effectsofdifferentsesquioxides(CrO3,Al3O3,Fe2O3)onthepropertiesofthefullysynthe-sized(co-clinker)magnesite-hromebrickandef-fectsofZrO2,Cr-Fealloy,ultra-finepowdersonthepropertiesofthefusedgrainrebondedbrickandthesemi-rebondedmagnesite-chromebrick,Applica-tionsofthebricksinvarioussecondarysteelmakingfurnaceshavebeenbrieflyintroducedaswell.
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简介:Thispaperintroducesofthedevelopmentandapplica-tionofheavilyburnedmullitedbrickwithhighreractorinessunderloadlowcreep,whichismadeofandalusiefineandcoarsegrains(asaggregate),highaluminabauxiteproducedinYangquancounty,clayproducedinGuangxiprovine,industrialaluminapowderandsilliman-itepowder(asmatrixmaterial)andalittleamountofad-ditivesandbondedwithsyntheticbond.
简介:Thepaperdescribestheprocessofproducinghighqualitymagnesite-chromebricksforVODre-finingfurnace,Theservicelifereaches14heats,averagelife12heats.Thestudiesshowthatthewearofthemagnesity-chromebricksismainlyduetochemicalcorrosion,thermalspallinginducedbythermalshockandthecorrosionarousedfromaccumulationofmoltenmaterialsintransitionzone.
简介:Inthepast25yearsinChina,tomeetwiththerapidincreaseinsteelproductionaccompaniedbyadoptionofadvancedmetallurgicaltechnologies,therehasbeenfastdevelopmentofChina'srefractoriesindustryinproductioncapacity,inqualityimprovementandindevelopmentofnewproducts.Sophisticatedhighperformancerefractorymaterialsmainlybasedonourrichreservesofmagnesite,bauxiteandflakegraphitehavebeendeveloped,suchascarbon-bondedproducts,highpurityoxideproducts,bauxite-basedlowcreepandhighstrengthhighaluminabricksandLC,ULCandZCcastables.Theyhavebeenusedinblastfurnaces,BOFs,EAFs,secondaryrefiningandcontinuouscastingwithconsiderableimprovementinserviceperformance.
简介:Inordertomeettheneedsofhotrepairingtechnologyofcokeoven,thezeroexpansionsilicabrickwithsuperpropertieshasbeendeveloped,andtheproblemofpoorthermalstabilityofcommonsilicabrickhasbeenovercomned.Thisproductcanbedirectlyusedafterbeingrapidlyheatedafterconstruction.Atpresent,ithasbeenappliedincokeovensinItalyandBaosteel.
简介:Thepropertiesofcastablesforironmaintroughhavebeenimprovedbymeansofincreaingthecastable'scriticalsizeandaddingexpandablemate-rial,TheprecastblocksmadefromthiscastablehavebeenusedasthescumwallofthemaintroughinBaosanI&sCo.,Whichhavesolvedtheproblemsusuallyoccurredinthisarea,suchasseriousero-sion,easycrakingandlowerservicelife.
简介:Thenon-burnedcorundumspineluppernozzle,maldeofelectro-fusedcorunndumpowder,highpureelectro-fusedspinelwiththermosettingresinasbinder,addedwithcompoundant-oxdationadditives,hassuperiorHMOR,excellentcorrosionresistanceandsimpleproductionprocess,Theuppernozzlewasusedin90MTladleandtheservicelifewasimprovedby50%to60%
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简介:AnO'-Sialon-Al2O3compositerefractorywaspreparedbyinsitureactionofSi3N4-ZrSiO4-Al2O3mixturewithfusedaluminaaggregates.Densification,insitureactionprocedureandmicrostructureofthematerialwereinvestigatedbymeansofX-raydiffraction,opticalandscanningelectronicmicroscopesandEDAX.