A PARTICLE COMPRISING COMPOSITE OXIDE OF CALCIUM AND MAGNESIUM AND COMPOSITE CARBIDE OF THEREOF, MANUFACTURE METHOD OF THE PARTICLE;AND ADDITIVE FOR PROTECTING FURNACE WALL COMPRISING THE PARTICLE

摘要

PURPOSE: A particle including the composite oxide and the composite carbide of calcium and magnesium, a method for manufacturing the particle, a furnace wall protecting additive including the same are provided to maintain the intensity of the particle by carbonizing the surface of a material containing the composite oxide. CONSTITUTION: A particle(10) includes a core part(11) and a surface layer(12). The core part includes the composite oxide of calcium and magnesium. The surface layer includes the composite carbide of the calcium and the magnesium. The core part is the massive body of the composite oxide or the molded body of the powdered composite oxide of the calcium and the magnesium. A binder is one selected from textrin, molasse, and Pregelatinized starch. The molded body includes 0.5-30 parts by weight of the binder, based on the 100.0 of the powdered composite oxide. The particle is obtained by contacting the core part with carbon dioxide.