简介:IntheprocessofVHD,argonisblownintothemoltensteelthrouhttheporousplugswhicharemountedintheladlebottom.AnewtypeofporouscorundumplughasbeendevelopedfortheVHDsecondaryrefiningladlefurnaceinFushunSteelWorks,Itisfoundthatwhenthemeangrainsizeofcorundumarticlesdecreasesfrom760μmtp650μm,thephysicalpropertiesandservicelifeoftheplugarethesameasthatofimportedone,andcanbenormallyusedintheVHDprocess.
简介:AkindofZrO2ceramicmaterialforporousmediaburnerwaspreparedbypolymericspongeprocesswithstartingmaterialsofzircon,zirconiapowder,microsilica,andballclay,andbinderofsilicasolthroughreaction-sintering.Theeffectsofmicrosilicaadditiononcoldcrushingstrengthandzirconia/zirconaddingratioonthermalshockresistancewerestudied.Theresultsshowthattheporousmediamaterialhasproperporosity,highstrength,andexcellentthermalshockresistancewhenzirconiaadditionis85%andzirconadditionis5%.Theperformanceindexesare:porosity82%,coldcrushingstrength3.1MPa,thermalshockresistancemorethan10cycles,andgoodthermalshockresistanceto1500℃flame.