PRODUCTION OF CARBON-CONTAINING CALCINED REFRACTORY

摘要

PURPOSE:To obtain a refractory useful as an inner lining material for molten metal container, showing oxidation preventing function even at low temperature by blending an oxide mixture containing specific amounts of carbon and chromium oxide, molding and calcining in an oxidizing atmosphere. CONSTITUTION:A mixture comprising 3-30wt.% carbon (e.g., natural graphite, artificial graphite and pitch coke), 0.1-20wt.%, preferably 0.0-10wt.% chromium oxide (=0.05mm particle size) and the rest of oxide such as silica rock, agalmatolite, sintered alumina or electrofused magnesia, molded and heat-treated at =1,2500 deg.C in an oxidizing atmosphere to give carbon-containing calcined refractory.