The for ladle it pours in, material

摘要

PURPOSE: To obtain a casting material for a ladle that is a transferring vessel for molten steel and having excellent slag infiltration resistance and corrosion resistance as the casting material for a slag line by adding a carbonaceous raw material with a specific component. ;CONSTITUTION: This casting material for a ladle is composed of 80-98wt.% of a magnesia raw material and 2-20wt.% of a carbonaceous raw material, which are further mixed with 0.1-1.0wt.% of a basic aluminum lactate, 0.2-2wt.% of silica flour having particle diameters of ≤5μm and 0.1-5.0wt. % of an ammonium salt of a formalin condensate with an aromatic sulfonic acid in terms of outer ratios. Preferably, the carbonaceous raw material is a mixture of carbon black with pitch and the compounding ratio of the pitch to the carbon black is one or less than one in terms of weight ratio. When the carbonaceous raw material is not the mixture of carbon black with pitch, a large amount of water is required for getting fluidity necessary to cast, and accordingly a product has a high porous ratio after dried and fails to get sufficient durability.;COPYRIGHT: (C)1996,JPO