TWI466844B

The present invention is directed to preventing a refractory material comprising a CaO component from hydration (slaking) of CaO, in a production stage, during storage and in a casting stage, over long periods. Specifically, the present invention provides a refractory product comprising CaO component-containing refractory particles and MgO component-containing refractory particles. The refractory material contains, in terms of a chemical composition measured after it has undergone heating in a non-oxidizing atmosphere at 1000°C, one or more metal oxides selected from the group consisting of B 2 O 3 , TiO 2 , V 2 O 5 , P 2 O 5 and SiO 2 in a total amount of 0.1 to 5.0 mass%, and free carbon in an amount of 2 to 35 mass%, with the remainder including CaO and MgO whose mass ratio (CaO/MgO) is in the range of 0.1 to 1.5, wherein, in microscopic observation performed at room temperature on a sample of the refractory material which has undergone heating in a non-oxidizing atmosphere at 1000°C, an inorganic film com