| 摘要 |
The present invention provides for long-term prevention of hydration (slaking) of CaO during a production stage, during storage, and during an operation stage in a refractory comprising a CaO component. That is, this refractory comprises refractory particles including a CaO component and refractory particles including an MgO component, where a chemical component after heating in a 1,000°C non-oxidizing atmosphere contains 0.1-5.0 mass% in total of one or more species of metal oxide selected from B2O3, TiO2, V2O5, P2O5, and SiO2, and 2-35 mass% of free carbon, the remainder being CaO and MgO and the (CaO/MgO) mass ratio being 0.1-1.5, and where an inorganic material coating 0.1-25 µm in thickness comprising CaO and the metal oxide(s) is formed on at least the CaO surface of the refractory particles including the CaO component and/or the MgO component in room-temperature microscopic observation of a sample after heating in a 1,000°C non-oxidizing atmosphere. |
