简介:IntheprocessofVHD,argonisblownintothemoltensteelthrouhttheporousplugswhicharemountedintheladlebottom.AnewtypeofporouscorundumplughasbeendevelopedfortheVHDsecondaryrefiningladlefurnaceinFushunSteelWorks,Itisfoundthatwhenthemeangrainsizeofcorundumarticlesdecreasesfrom760μmtp650μm,thephysicalpropertiesandservicelifeoftheplugarethesameasthatofimportedone,andcanbenormallyusedintheVHDprocess.